FOOT FRAME BOTTOM PLATE TYPE FIXED PARTS, SEALED INNER LINING STRUCTURE, UNDERGROUND CHAMBER AND CONSTRUCTION METHOD

The present invention provides a foot frame bottom plate type fixed part, a sealed inner lining structure, an underground chamber, belonging to the field of compressed air energy storage technology. The skeleton includes a fixed bottom plate and an umbrella shaped tripod, which is equipped with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part. The umbrella shaped tripod is fixedly connected to the fixed bottom plate in the length direction, forming a semi open containment space clamp. The sealing inner lining structure includes an airtight layer and a foot rest bottom plate shaped fixed part. The underground chamber includes a concrete lining layer and a sealed lining structure. Its construction period is shorter than that of welded steel plates, and the cost is lower.

TECHNICAL FIELD

The present invention relates to the field of compressed air energy storage technology, in particular to foot frame bottom plate shaped components, sealed inner lining structures, underground chambers, and construction methods.

BACKGROUND TECHNOLOGY

Compressed air energy storage technology is a high-capacity, long-term physical energy storage technology that does not involve the combustion of fossil fuels, does not emit any harmful substances, and is more environmentally friendly. It can greatly improve the spatiotemporal structure of power generation and consumption in the power grid, increase the peak shaving capacity of the power grid, and solve the intermittent problem of renewable energy. It is being widely promoted and applied in China. The compressed air energy storage system mainly uses ground steel tanks/pipes, salt rock caves, and artificial lined chambers as high-pressure air storage containers. Large scale storage devices currently rely on salt caves and artificial lined chambers. With the gradual advancement of industrialization, artificial lined chambers will gradually become a widely used gas storage method. Unlike general underground chambers, artificial lined chambers specifically designed for gas storage will withstand high internal pressure, high temperature changes, and high-frequency alternating loads, posing new challenges to the design of chamber sealing layers.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a foot frame bottom plate type fixed component, a sealed inner lining structure, an underground chamber, and a construction method. The foot frame bottom plate type fixed component can be combined to form a sealed inner lining structure, which is constructed for the underground chamber and forms the sealed inner lining structure on the inner wall of the underground chamber. The construction period is shorter than that of welded steel plates, the cost is lower, and it is more suitable for practical use.

In order to achieve the first purpose mentioned above, the technical solution of the foot rest bottom plate shaped fixed part provided by the present invention is as follows:

The foot rest bottom plate shaped fixed part (2) provided by the present invention is in a circular shape, and the foot rest bottom plate shaped fixed part (2) includes a fixed bottom plate (7) and an umbrella shaped foot rest (8). After cutting and unfolding the foot rest bottom plate shaped fixed part (2) along the axis direction,

The fixed base plate (7) has a length direction and a width direction,

The umbrella shaped tripod (8) has a length direction and a width direction, and the umbrella shaped tripod (8) is equipped with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part, so that the umbrella shaped part faces the connecting part and has protrusions on both sides in the length direction of the umbrella shaped tripod (8),

The umbrella shaped tripod (8) is fixedly connected to the fixed bottom plate (7) along the length direction of the fixed bottom plate (7) using its connecting part, so that a semi open containment space clamp is formed between the umbrella shaped part of the umbrella shaped tripod (8) and the fixed bottom plate (7), so that the height of the semi open containment space near the connecting part of the umbrella shaped tripod (8) is h1, and the height of the semi open containment space near the open side position of the umbrella shaped tripod (8) is h2, h1>h2.

The foot rest bottom plate shaped fixed part provided by the present invention can further be achieved by the following technical measures.

As a preferred option, the connecting part of the umbrella shaped tripod (8) is integrally formed with the umbrella shaped part.

As a preferred option, the umbrella shaped tripod (8) is fixedly connected to the fixed base plate (7) by fastening bolts, or the umbrella shaped tripod (8) is integrally formed with the fixed base plate (7).

As a preferred option, the foot rest bottom plate shaped component (2) is made of corrosion-resistant steel.

As a preferred option,

The circular shaped bottom plate shaped fixed part (2) of the tripod is integrally formed,

The tripod base plate shaped shaping component (2) comprises multiple tripod base plate shaped shaping components, which are docked and assembled from the width direction to form a circular tripod base plate shaped shaping component (2).

In order to achieve the second objective mentioned above, the technical solution of the sealing lining structure provided by the present invention is as follows:

The sealing inner lining structure provided by the present invention includes an airtight layer (3) and at least one foot rest bottom plate shaped fixing member (2) provided by the present invention,

The airtight layer (3) is provided on the foot rest bottom plate shaped part (2) through a clamp with a semi open storage space.

The sealing inner lining structure provided by the present invention can further be achieved by the following technical measures.

As a preferred choice, the airtight layer (3) is made of a material that can deform under pressure.

As a preferred option, the edge of the airtight layer (3) is provided with a fitting portion that is embedded with the semi open containment space clamp, and the airtight layer (3) is set on the foot frame bottom plate shaped fixed part (2) through the fitting portion. As a preferred option, the tripod base plate shaped fixed part (2) comprises multiple,

The centers of multiple circular foot rest bottom plate shaped fixed parts (2) are coaxial, and the multiple circular foot rest bottom plate shaped fixed parts (2) are connected as a whole through the airtight layer (3);

The airtight layer (3) is connected to the foot rest bottom plate shaped fixed member (2) through a clamp with a semi open storage space, making the sealing inner lining structure a cylindrical sealing inner lining structure.

As a preferred arrangement, multiple annular shaped foot rest bottom plate shaped fixed parts (2) are uniformly arranged along the axial direction of the cylindrical sealing inner lining mechanism.

In order to achieve the third objective mentioned above, the technical solution of the underground chamber provided by the present invention is as follows:

The underground chamber provided by the present invention includes a concrete lining layer (1) and a sealed lining structure provided by the present invention,

The inner wall of the concrete lining layer (1) is cylindrical,

The sealing inner lining structure is fixed on the inner wall of the concrete lining layer (1) through the fixed bottom plate (10) of the foot frame bottom plate shaped shaping member (2).

In order to achieve the fourth objective mentioned above, the technical scheme of the construction method for the underground chamber provided by the present invention is as follows:

The construction method of the underground chamber provided by the present invention includes the following steps:

According to the inner diameter of the underground chamber, a circular foot frame bottom plate shaped fixing member (2) is fixedly arranged on the inner wall of the underground chamber, so that the outer diameter of the circular foot frame bottom plate shaped fixing member (2) matches the inner diameter of the underground chamber;

The airtight layer (3) is embedded in the annular footrest bottom plate shaped fixed member (2) through the semi open capacity space clamp, so that the inner wall of the underground chamber forms the sealing inner lining structure provided by the present invention.

The construction method of the underground chamber provided by the present invention can further be achieved by adopting the following technical measures.

As a preferred method, according to the inner diameter of the underground chamber, the outer diameter of the annular foot frame bottom plate shaped fixed part (2) is matched with the inner diameter of the underground chamber, including the following steps:

Drill the first type of connecting hole on the inner wall of the underground chamber;

Adjust the position of the foot frame bottom plate fixed part (2) so that the second connecting hole of the foot frame bottom plate fixed part (2) corresponds to the position of the first connecting hole on the inner wall of the underground chamber;

Screw the locking bolt (5) into the first and second connecting holes simultaneously, so that the foot frame bottom plate shaped fixing piece (2) is fixed to the inner wall of the underground chamber.

As a preferred method, after the step of embedding the airtight layer (3) into the hollow through the semi open capacity space clip, so that the inner wall of the underground chamber forms the sealing lining structure provided by the present invention, the following steps are further included:

Conduct gas storage tests on the underground chamber to determine its sealing performance;

Real time monitoring shall be carried out for possible air leakage points in the underground chamber.

As a preferred method, during the process of real-time monitoring of possible air leakage points in the underground chamber, the possible air leakage points include: the connection between the airtight layer (3) and the foot frame bottom plate shaped fixed part (2), the connection between the connection part of the foot frame bottom plate shaped fixed part (2) and the umbrella shaped part, the connection between the fixed bottom frame of the foot frame bottom plate shaped fixed part (2) and the inner wall of the underground chamber, and one or more parts of the airtight layer (3) itself.

As a preferred method, real-time monitoring of potential air leakage points in the underground chamber includes the following steps:

Install gas flow monitoring instruments at potential leakage points in the underground chamber, and set location labels for each gas flow monitoring instrument;

Set an alarm threshold for the gas flow monitoring instrument based on its location;

When an abnormal gas flow alarm occurs, determine the leakage point of the underground chamber based on the location label of the gas flow monitoring instrument that triggered the alarm.

The foot rest bottom plate shaped fixed part2provided by the present invention can be embedded with an airtight layer3through the semi open capacity space clamp formed by it. Since the height of the semi open capacity space near the connection part of the umbrella shaped foot rest is greater than the height of the semi open capacity space near the open side position of the umbrella shaped foot rest, it is possible to use the outer edge of the bulk foot rest8to form a fitting between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part2of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the airtight layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of time and cost lower. During maintenance, the damaged parts can be directly replaced.

SPECIFIC IMPLEMENTATION METHODS

In view of this, the present invention provides a foot frame bottom plate shaped fixed component2, a sealed inner lining structure, an underground chamber, and a construction method. The foot frame bottom plate shaped fixed component2can be combined to form a sealed inner lining structure for construction of the underground chamber, so that the inner wall of the underground chamber forms the sealed inner lining structure, which can significantly enhance the sealing performance of the underground chamber, and is more suitable for practical use.

After arduous and extraordinary efforts, the inventor discovered that,

The traditional design approach is to use steel plates as sealing materials, but the cost of steel plate sealing is high, the insulation performance of the tunnel is good, and the duration of high-temperature load is long. Research has shown that rubber materials have the basic conditions for application in the sealing layer of high-pressure gas storage chambers, with low unit cost, good mechanical and sealing properties. However, traditional rubber gas storage materials are made as a whole structure at the factory, making installation in underground gas storage chambers very difficult. How to design a combination sealing lining structure that is easy to install and can ensure sealing performance has become an urgent problem to be solved.

In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed explanation of the specific implementation method, structure, features, and effects of the foot frame bottom plate type fixed part2, sealing inner lining structure, underground chamber, and construction method proposed based on the present invention, combined with the accompanying drawings and preferred embodiments, as follows. In the following explanation, different “embodiments” or “embodiments” may not necessarily refer to the same embodiment. In addition, specific features, structures, or features in one or more embodiments may be combined in any suitable form.

The term “and/or” in this article is only a description of the association relationship between related objects, indicating that there can be three types of relationships, such as A and/or B. It can be understood as: it can contain both A and B, can exist alone A, can exist alone B, and can have any of the three situations mentioned above.

Foot Frame Bottom Plate Type Fixed Part

Referring toFIGS.1to6, the foot rest bottom plate shaped shaping member2provided in the embodiment of the present invention is in a circular shape, and the foot rest bottom plate shaped shaping member2includes a fixed bottom plate7and an umbrella shaped foot rest8. After cutting and unfolding the foot rest bottom plate shaped shaping member2along the axis direction, the fixed bottom plate7has a length direction and a width direction, the umbrella shaped foot rest8has a length direction and a width direction, and the umbrella shaped foot rest8is provided with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part, so that the umbrella shaped part faces the connecting part and has protrusions on both sides of the length direction of the umbrella shaped foot rest8. The umbrella shaped foot rest8uses its connecting part to fix and connect to the fixed bottom plate7along the length direction of the fixed bottom plate7, so that The umbrella shaped part of the umbrella shaped tripod8forms a semi open containment space clamp between the umbrella shaped part and the fixed bottom plate7, The height of the connecting part of the semi open storage space near the umbrella shaped tripod8is h1, and the height of the open side of the semi open storage space near the umbrella shaped tripod8is h2, with h1>h2.

The foot rest bottom plate shaped fixed part2provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open capacity space clamp formed by it. Since the height of the semi open capacity space near the connection part of the umbrella shaped foot rest is greater than the height of the semi open capacity space near the open side position of the umbrella shaped foot rest, it is possible to use the outer edge of the bulk foot rest8to form a fitting between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part2of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the airtight layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of time and cost lower. During maintenance, the damaged parts can be directly replaced.

Among them, the connecting part of the umbrella shaped tripod8is integrated with the umbrella shaped part. In this case, there is no connection joint between the connecting part and the umbrella shaped part, which can avoid stress concentration and prolong the service life of the umbrella shaped tripod8.

Among them, the umbrella shaped tripod8is fixedly connected to the fixed bottom plate7by fastening bolts, or the umbrella shaped tripod8is integrally formed with the fixed bottom plate7. In this case, there is no connection joint between the umbrella shaped tripod8and the fixed base plate7, which can avoid stress concentration and prolong the service life of the tripod base plate shaped fixed part2provided in the embodiment of the present invention.

Among them, the base plate type fixed part2of the tripod is made of corrosion-resistant steel. Iron carbon alloys with a carbon content of less than 2.11%, excluding impurities such as iron, carbon, and silicon, manganese, phosphorus, sulfur within the limit, and without other alloying elements. The carbon content of industrial carbon steel is generally between 0.05% and 1.35%. The performance of corrosion-resistant steel mainly depends on its carbon content. As the carbon content increases, the strength and hardness of the steel increase, while plasticity, toughness, and weldability decrease. Compared with other types of steel, corrosion-resistant steel is the earliest to be used, with low cost, wide performance range, and the largest usage. Suitable for media such as water, steam, air, hydrogen, ammonia, nitrogen, and petroleum products with a nominal pressure of PN≤32.0MPa and a temperature range of −30-425° C. Commonly used grades include WC1, WCB, ZG25, high-quality steel 20, 25, 30, and low alloy structural steel 16 Mn. Therefore, the application of corrosion-resistant steel in the embodiment of the invention can improve the strength of the foot stand bottom plate shaped fixed part2.

Among them, the circular shaped tripod base plate shaped shaping part2is integrally formed, or the tripod base plate shaped shaping part2includes multiple tripod base plate shaped shaping components, which are docked and assembled from the width direction to form a circular shaped tripod base plate shaped shaping part2. When the ring-shaped tripod base plate shaped fixed part2is formed as a whole without connecting joints, it can not only avoid stress concentration but also prevent fracture from the connecting joints, which can improve the service life of the ring-shaped tripod base plate shaped fixed part2; When the circular foot frame bottom plate shaped fixed part2is formed by multiple foot frame bottom plate shaped fixed components docking and assembling from the width direction, it is more convenient to assemble it on the inner wall of the underground chamber. In practice, choices can be made based on needs.

Sealing Lining Structure

The sealing inner lining structure provided by the present invention includes an airtight layer3and at least one foot rest bottom plate shaped shaping member2provided by the present invention. The airtight layer3is set on the foot rest bottom plate shaped fixed part2through a clamp with a semi open storage space.

The foot rest bottom plate shaped fixed part2provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open capacity space clamp formed by it. Since the height of the semi open capacity space near the connection part of the umbrella shaped foot rest is greater than the height of the semi open capacity space near the open side position of the umbrella shaped foot rest, it is possible to use the outer edge of the bulk foot rest8to form a fitting between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part2of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the airtight layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of time and cost lower. During maintenance, the damaged parts can be directly replaced.

Among them, the airtight layer3is made of a material that can deform under pressure. In this case, the compressible and deformable characteristics of the airtight layer3can be utilized to enhance the stability of the fitting between the foot rest bottom plate shaped fixed part2and the airtight layer3.

Among them, the edge of the airtight layer5is equipped with a fitting part that is embedded with the semi open storage space clamp, and the airtight layer5is set on the foot frame bottom plate shaped fixed part2through the fitting part. In this embodiment, the fitting part can be a protrusion that is compatible with a semi open storage space clamp, which can improve the compatibility between the airtight layer3and the foot rest bottom plate shaped part2.

Among them, the sealing inner lining structure is a sealing inner lining structure set on the cylindrical inner wall, and the foot frame bottom plate shaped fixed part2includes multiple. The center of the circular bottom plate shaped fixed part with multiple legs in a circular shape is coaxial, and the multiple circular bottom plate shaped fixed parts2of the legs are connected to one body through the airtight layer (3); The airtight layer3is connected to the foot rest bottom plate shaped fixed part2through a clamp with a semi open storage space, making the sealing inner lining structure a cylindrical sealing inner lining structure. In this case, the airtight layer3is set between multiple circular foot rest bottom plate shaped fixed parts2to form a hollow. As the multiple directions of the airtight layer3are embedded with the foot rest bottom plate shaped fixed parts2, it can avoid the displacement of the airtight layer3between the foot rest bottom plate shaped fixed parts2, further ensuring the airtightness of the sealing inner lining structure formed by it. In addition, multiple circular foot frame bottom plate shaped fixed parts2are equivalent to having multiple ribs, which can ensure their own strength. Therefore, they can reduce the possibility of deformation of the sealing inner lining structure and extend the service life.

Among them, multiple annular shaped foot rest bottom plate shaped fixed parts2are uniformly arranged along the axial direction of the cylindrical sealing inner lining mechanism. In this case, the sealing inner lining formed by it is uniformly stressed, and setting it in the underground chamber can extend the service life of the underground chamber provided in the embodiments of the present invention.

Underground Chamber

The underground chamber provided by the present invention includes a concrete lining layer1and a sealed lining structure provided by the present invention. The inner wall of concrete lining layer1is cylindrical, and the sealed inner lining structure is fixed on the inner wall of concrete lining layer1through the fixed bottom plate7of the foot frame bottom plate shaped shaping component2.

The foot rest bottom plate shaped fixed part2provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open capacity space clamp formed by it. Since the height of the semi open capacity space near the connection part of the umbrella shaped foot rest is greater than the height of the semi open capacity space near the open side position of the umbrella shaped foot rest, it is possible to use the outer edge of the bulk foot rest8to form a fitting between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part2of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the airtight layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of time and cost lower. During maintenance, the damaged parts can be directly replaced.

Construction Methods for Underground Chambers

The construction method of the underground chamber provided by the present invention includes the following steps:

According to the inner diameter of the underground chamber, a circular foot frame bottom plate shaped fixed part2is fixedly arranged on the inner wall of the underground chamber, so that the outer diameter of the circular foot frame bottom plate shaped fixed part2matches the inner diameter of the underground chamber;

The airtight layer3is embedded in the annular footrest bottom plate shaped fixed part2through a semi open capacity space clamp, so that the inner wall of the underground chamber forms the sealing inner lining structure provided by the present invention.

The foot rest bottom plate shaped fixed part2provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open capacity space clamp formed by it. Since the height of the semi open capacity space near the connection part of the umbrella shaped foot rest is greater than the height of the semi open capacity space near the open side position of the umbrella shaped foot rest, it is possible to use the outer edge of the bulk foot rest8to form a fitting between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part2of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the airtight layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of time and cost lower. During maintenance, the damaged parts can be directly replaced.

Among them, according to the inner diameter of the underground chamber, a circular foot frame bottom plate shaped fixed part2is fixedly arranged on the inner wall of the underground chamber, so that the circular foot frame bottom plate shaped fixed part2is compatible with the inner wall of the underground chamber, including the following steps:

Drill the first type of connecting hole on the inner wall of the underground chamber;

Adjust the position of the foot frame bottom plate fixed part2so that the second connection hole of the foot frame bottom plate fixed part2corresponds to the position of the first connection hole on the inner wall of the underground chamber;

Screw the locking bolt5into both the first and second connection holes simultaneously, so that the foot frame bottom plate fixed part2is fixed to the inner wall of the underground chamber.

In this case, the sealing lining structure can be stably fixed on the inner wall of the concrete lining layer1of the underground chamber through the first connection hole, the second connection hole, and the tightening bolt5, and the cost is low.

Among them, after embedding the airtight layer3into the hollow through a semi open capacity space clip, forming the sealing inner lining structure provided by the present invention on the inner wall of the underground chamber, the following steps are also included:

Conduct gas storage tests on underground chambers to determine their sealing performance;

Real time monitoring of possible air leakage points in underground tunnels.

In this case, real-time monitoring of possible leakage points in the underground chamber can be carried out, and once a leakage occurs, it can be promptly known and remedied.

During the process of real-time monitoring of possible air leakage points in the underground chamber, the possible air leakage points include: the connection between the airtight layer3and the foot frame bottom plate fixed part2, the connection between the foot frame bottom plate fixed part2and the umbrella shaped part, the connection between the fixed bottom frame of the foot frame bottom plate fixed part2and the inner wall of the underground chamber, and one or more parts of the airtight layer3itself. In this case, real-time monitoring can be accurately carried out for possible air leakage points in underground tunnels.

Among them, real-time monitoring of possible air leakage points in underground tunnels includes the following steps:

Install gas flow monitoring instruments at potential leakage points in underground tunnels, and set location labels for each gas flow monitoring instrument;

Set an alarm threshold for the gas flow monitoring instrument based on its location;

When an abnormal gas flow alarm occurs, determine the location of the leakage point in the underground chamber based on the location label of the gas flow monitoring instrument that triggered the alarm.

In this case, once a possible leakage point in the underground chamber occurs, the leakage point in the underground chamber can be accurately determined based on the alarm information and the location label of the gas flow monitoring instrument, and emergency repair measures can be taken.

Foot Frame Base Type Skeleton

Referring toFIGS.9to14, the footrest bottom frame provided in the embodiments of the present invention includes a fixed bottom plate10and an umbrella shaped footrest11. The fixed base plate10has a length direction and a width direction, and the umbrella shaped foot frame11has a length direction and a width direction. The umbrella shaped foot frame11is equipped with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part, so that the umbrella shaped part faces the connecting part and has protrusions on both sides of the length direction of the umbrella shaped foot frame11. The umbrella shaped foot frame11uses its connecting part to fixedly connect to the fixed base plate10along the length direction of the fixed base plate10, so that a semi open containment space clamp is formed between the umbrella shaped part of the umbrella shaped foot frame11and the fixed base plate10. The height of the semi open containment space close to the connecting part of the umbrella shaped foot frame11is h1, and the semi open containment space is close to the umbrella shaped storage space. The height of the open side position of tripod11is h2, where h1 is greater than h2.

The foot frame bottom plate type skeleton provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open storage space clamp formed by it. Among them, since the height of the semi open storage space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open storage space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the bulk foot frame11to form a fit between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground gas storage. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage needs. The airtightness layer3has a short construction period, and the components can be prefabricated. Compared with the disadvantage of traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced.

Among them, the connecting part of the umbrella shaped tripod11is integrated with the umbrella shaped part. In this case, there is no connection joint between the connecting part and the umbrella shaped part, which can avoid stress concentration and prolong the service life of the umbrella shaped tripod11.

Among them, the umbrella shaped tripod11is fixedly connected to the fixed bottom plate10by fastening bolts, or the umbrella shaped tripod11is integrally formed with the fixed bottom plate10. In this case, there is no connection joint between the umbrella shaped tripod11and the fixed bottom plate10, which can avoid stress concentration and prolong the service life of the tripod bottom plate skeleton provided in the embodiments of the present invention.

Among them, the bottom frame of the tripod is made of corrosion-resistant steel. Iron carbon alloys with a carbon content of less than 2.11%, excluding impurities such as iron, carbon, and silicon, manganese, phosphorus, sulfur within the limit, and without other alloying elements. The carbon content of industrial carbon steel is generally between 0.05% and 1.35%. The performance of corrosion-resistant steel mainly depends on its carbon content. As the carbon content increases, the strength and hardness of the steel increase, while plasticity, toughness, and weldability decrease. Compared with other types of steel, corrosion-resistant steel is the earliest to be used, with low cost, wide performance range, and the largest usage. Suitable for media such as water, steam, air, hydrogen, ammonia, nitrogen, and petroleum products with a nominal pressure of PN≤32.0MPa and a temperature range of −30-425° C. Commonly used grades include WC1, WCB, ZG25, high-quality steel 20, 25, 30, and low alloy structural steel 16 Mn. Therefore, the use of corrosion-resistant steel as the base plate type skeleton provided in the embodiments of the invention can improve the strength of the base plate type skeleton.

Sealing Lining Structure

The sealing inner lining structure provided by the present invention includes an airtight layer3and at least one footrest bottom plate type skeleton provided by the present invention. The airtight layer3is set on the bottom frame of the tripod through a clamp with a semi open storage space.

The foot frame bottom plate type skeleton provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open storage space clamp formed by it. Among them, since the height of the semi open storage space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open storage space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the bulk foot frame11to form a fit between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground gas storage. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage needs. The airtightness layer3has a short construction period, and the components can be prefabricated. Compared with the disadvantage of traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced.

Among them, the airtight layer3is made of a material that can deform under pressure. In this case, the compressibility and deformability of the airtight layer3can be utilized to enhance the stability of the fit between the footrest bottom frame and the airtight layer3.

Among them, the edge of the airtight layer3is equipped with a fitting part that is embedded with the opening of the semi open storage space, and the airtight layer3is set on the foot frame bottom plate type skeleton through the fitting part. In this embodiment, the embedding part can be a protrusion that is adapted to a semi open capacity space clamp, which can improve the compatibility between the airtight layer3and the foot frame bottom plate type skeleton.

Among them, the tripod base type skeleton includes multiple. Multiple tripod base type skeletons are arranged vertically and horizontally in a staggered manner, forming a hollow between the multiple tripod base type skeletons; The airtight layer3is set inside the hollow through a clamp with a semi open storage space. In this case, the airtight layer3is set between multiple foot frame bottom type skeletons to form a hollow. Due to the multiple orientations of the airtight layer3being embedded with the foot frame bottom type skeleton, it can avoid the displacement of the airtight layer3within the hollow of the foot frame bottom type skeleton, further ensuring the airtightness of the sealing lining structure formed by it.

Among them, the sealed inner lining structure is a sealed inner lining structure set on the cylindrical inner wall. The tripod bottom plate type skeleton includes multiple axial skeletons and multiple circumferential skeletons, which are connected in a crisscross manner, forming a hollow between the multiple tripod bottom plate type skeletons; The airtight layer3is set inside the hollow through a clamp with a semi open storage space. In this case, the footrest bottom plate type skeleton is equivalent to having multiple ribs, which can ensure its own strength. At the same time, the footrest bottom plate type skeleton forms more hollows between them, which can further ensure the airtightness of the sealed inner lining structure formed by it by setting an airtight layer3inside.

Among them, multiple axial skeletons and multiple circumferential skeletons are uniformly arranged. In this case, the sealing inner lining formed by it is uniformly stressed, and setting it in the underground gas storage can prolong the service life of the underground gas storage provided in the embodiments of the present invention.

Underground Gas Storage

The underground gas storage provided by the present invention includes a concrete lining layer1and a sealed lining structure provided by the present invention. The inner wall of concrete lining layer1is cylindrical, and the sealing lining structure is fixed on the inner wall of concrete lining layer1through the fixed bottom plate10of the foot frame bottom plate type skeleton.

The foot frame bottom plate type skeleton provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open storage space clamp formed by it. Among them, since the height of the semi open storage space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open storage space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the bulk foot frame11to form a fit between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground gas storage. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage needs. The airtightness layer3has a short construction period, and the components can be prefabricated. Compared with the disadvantage of traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced.

The construction method of the underground gas storage provided by the present invention includes the following steps:

Construction Methods for Underground Gas Storage Facilities

According to the inner diameter of the underground gas storage, assemble a foot frame bottom plate type skeleton, which includes multiple axial skeletons and multiple circumferential skeletons. The multiple axial skeletons and circumferential skeletons are connected vertically and horizontally, forming a hollow between the multiple foot frame bottom plate type skeletons;

Lay the tripod bottom plate skeleton onto the inner wall of the underground gas storage, and fix the tripod bottom plate skeleton to the inner wall of the underground gas storage;

The airtight layer3is embedded in the hollow through a semi open capacity space clip, so that the inner wall of the underground gas storage tank forms the sealing inner lining structure provided by the present invention.

The foot frame bottom plate type skeleton provided in the embodiment of the present invention can be embedded with an airtight layer3through the semi open storage space clamp formed by it. Among them, since the height of the semi open storage space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open storage space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the bulk foot frame11to form a fit between the airtight layer3, thereby avoiding the displacement or detachment of the airtight layer3and ensuring airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground gas storage. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage needs. The airtightness layer3has a short construction period, and the components can be prefabricated. Compared with the disadvantage of traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced.

Among them, laying the foot frame bottom plate skeleton to the inner wall of the underground gas storage, and fixing the foot frame bottom plate skeleton to the inner wall of the underground gas storage, specifically including the following steps:

Drill the first type of connecting hole on the inner wall of the underground gas storage facility;

Adjust the position of the tripod base plate skeleton so that the second connection hole of the tripod base plate skeleton corresponds to the position of the first connection hole on the inner wall of the underground gas storage facility;

Screw the fastening bolts into both the first and second connection holes simultaneously, so that the base plate type framework of the tripod is fixed to the inner wall of the underground gas storage.

In this case, the sealing lining structure can be stably fixed on the inner wall of the concrete lining layer1of the underground gas storage through the first connection hole, the second connection hole, and the fastening bolt, and the cost is low.

Among them, after embedding the airtight layer3into the hollow through a semi open capacity space clip, forming the sealing inner lining structure provided by the present invention on the inner wall of the underground gas storage, the following steps are also included:

Conduct gas storage tests on underground gas storage facilities to determine their sealing performance;

Real time monitoring of potential leakage points in underground gas storage facilities.

In this case, real-time monitoring of possible leak points in underground gas storage can be carried out, and once a leak occurs, it can be promptly identified and remedied.

In the process of real-time monitoring of possible leakage points in underground gas storage, the possible leakage points include: the connection between airtight layer3and the foot frame bottom plate skeleton, the connection between the foot frame bottom plate skeleton and the umbrella shaped part, the connection between the fixed bottom frame of the foot frame bottom plate skeleton and the inner wall of the underground gas storage, and one or more parts of airtight layer3itself. In this case, it is possible to accurately monitor the possible leakage points of underground gas storage in real-time.

Among them, real-time monitoring of possible leakage points in underground gas storage facilities includes the following steps:

Install gas flow monitoring instruments at potential leak points in underground gas storage facilities, and set location labels for each gas flow monitoring instrument;

Set an alarm threshold for the gas flow monitoring instrument based on its location;

When an abnormal gas flow alarm occurs, determine the leakage point of the underground gas storage based on the location label of the gas flow monitoring instrument that triggered the alarm.

In this case, once a possible leakage point in the underground gas storage occurs, the leakage point of the underground gas storage can be accurately determined based on the alarm information and the location label of the gas flow monitoring instrument, and emergency repair measures can be taken.

Dome Sealed Inner Lining Structure of a Tripod Type Underground Rock Lined Cavern

Referring toFIGS.15to26, an embodiment of the present invention provides a dome sealed inner lining structure for a tripod type underground rock lining cavern. The tripod type underground rock lining cavern is set inside the surrounding rock25, and a concrete lining layer1is set between the tripod type underground rock lining cavern and the surrounding rock25. Among them, the dome sealing inner lining structure of the footrest underground rock lining chamber includes a dome skeleton3, a columnar skeleton26, a fan ring airtight layer4, and a columnar ring airtight layer27. The dome skeleton3and the columnar skeleton26respectively provide footrest bottom plate type connectors. The columnar skeleton26is fixedly connected to the bottom of the dome skeleton3through a foot rest bottom plate type connector; The fan ring airtight layer4is fixedly connected between the dome skeleton3through a foot frame bottom plate connector, and the column ring airtight layer27is fixedly connected between the column skeleton26through a foot frame bottom plate connector, so that the fan ring airtight layer4and the column ring airtight layer27together form the dome sealing lining structure of the underground rock lining cavern.

The construction process of the dome sealed inner lining structure of the foot frame type underground rock lined cavern provided by the embodiment of the present invention does not require the provision of an overall sealed inner lining structure in the concrete lining layer1. Instead, a skeleton is first laid out in the concrete lining layer1, and the airtight layer is connected between the skeletons, ultimately forming the dome sealed inner lining structure of the underground rock lined cavern. Compared to the overall sealing layer, the installation is more convenient, the work efficiency is higher, and the cost is lower.

Among them, the dome skeleton3includes a spherical shell plate9, a circular skeleton10, multiple arc-shaped skeletons11, an outer ring skeleton12, an inner ring skeleton13, a radial skeleton14, and a circular platform2. The inner diameter of the annular skeleton10is equal to the diameter of the spherical shell plate9, and the annular skeleton10is fixed at the outer ring of the spherical shell plate9. The diameter of outer ring skeleton12is greater than that of inner ring skeleton13, and the diameter of inner ring skeleton13is greater than that of spherical shell plate9. One end of the arc-shaped skeleton11is fixedly connected to the annular skeleton10, and the other end of the arc-shaped skeleton11is fixedly connected to the outer ring skeleton12. One end of the radial skeleton14is fixedly connected to the outer ring skeleton12, and the other end of the radial skeleton14is fixedly connected to the inner ring skeleton13, forming a circular belt between the outer ring skeleton12and the inner ring skeleton13. Circular platform2is located within the circular belt, wherein it is fixedly connected between the outer ring skeleton12, the inner ring skeleton13, and the radial skeleton14through a foot rest bottom plate type connector. One end of the columnar skeleton26is fixedly connected to the inner ring skeleton13. The spherical plate9is sealed in the construction shaft. In this case, the dome skeleton3is easy to form, and the connection reliability is high when connected to the dome skeleton3using foot rest bottom plate connectors.

Among them, the tripod base plate type connector includes the first tripod base plate type connector, the second tripod base plate type connector, the third tripod base plate type connector, the fourth tripod base plate type connector, and the fifth tripod base plate type connector. The first tripod base plate type connector is set at the connection between the annular skeleton10and the fan-shaped airtight layer4. The second tripod base plate type connector is set at the connection between the arc-shaped skeleton11and the fan-shaped airtight layer4. The bottom plate type connector of the third tripod is set at the connection between the outer ring skeleton12, the fan ring airtight layer4, and the annular platform2. The fourth tripod base plate type connector is set at the connection between the circular platform2and the column ring type airtight layer27. The fifth tripod base plate type connector is set at the connection between the column ring type airtight layer27and the column shaped skeleton26. In this case, different forms of foot rest bottom plate connectors can be set according to the specific situation of different connection parts, which has better adaptability.

Among them, the first tripod base plate type connector includes a first fixed base plate15and a first tripod16. After cutting and unfolding the first tripod base plate type connector along the axis direction. The first fixed base plate15has a length direction and a width direction. The first tripod16has a length direction and a width direction. The first tripod16is equipped with a connecting part and a bending hook part. The bending hook part is set at the top of the connecting part, so that the bending hook part has protrusions towards the length direction of the first tripod16towards the connecting part. The first tripod16is fixedly connected to the first fixed bottom plate15along the length direction of the first fixed bottom plate15using its connecting part, so that a semi open capacity space clamp is formed between the bending hook of the first tripod16and the first fixed bottom plate15. The height of the semi open capacity space near the connecting part of the first tripod16is h1, and the height of the semi open capacity space near the open side position of the first tripod16is h2, h1>h2. In this case, the fan-shaped airtight layer4can be connected to the annular skeleton10using the semi open capacity space clamp, with high connection reliability.

Among them, the second tripod base plate type connector includes a second fixed base plate17and a second tripod18. After cutting and unfolding the second tripod base plate type connector along the axis direction, the cross-section of the second tripod18is umbrella shaped. The second fixed base plate17has a length direction and a width direction. The second leg18has a length direction and a width direction, and the second leg18is equipped with a connecting portion and an umbrella shaped portion. The umbrella shaped portion is set at the top of the connecting portion, so that the umbrella shaped portion has protrusions on both sides of the length direction of the second leg18towards the connecting portion. The second leg18is fixedly connected to the second fixed bottom plate17along the length direction of the second fixed bottom plate17using its connecting part, so as to form a semi open containment space clamp between the umbrella shaped part of the second leg18and the second fixed bottom plate17. The height of the semi open containment space near the connecting part of the second leg18is h3, and the height of the semi open containment space near the open side position of the second leg8is h4, h3>h4. In this case, the fan-shaped airtight layer4can be connected to the arc-shaped skeleton11using the semi open capacity space clamp, with high connection reliability.

Among them, the fifth tripod base plate type connector includes the fifth fixed base plate23and the fifth tripod28. After cutting and unfolding the fifth tripod base plate type connector along the axis direction, the cross-section of the fifth tripod28is umbrella shaped. The fifth fixed bottom plate23has both length and width directions. The fifth leg28has a length direction and a width direction, and the fifth leg18is equipped with a connecting portion and an umbrella shaped portion. The umbrella shaped portion is set at the top of the connecting portion, so that the umbrella shaped portion has protrusions on both sides of the length direction of the fifth leg28towards the connecting portion. The fifth tripod28is fixedly connected to the fifth fixed bottom plate23along the length direction of the fifth fixed bottom plate23using its connecting part, so as to form a semi open capacity space clamp between the umbrella shaped part of the fifth tripod28and the fifth fixed bottom plate23. The height of the semi open capacity space near the connecting part of the fifth tripod28is h5, and the height of the semi open capacity space near the open side position of the fifth tripod28is h6, h5>h6. In this case, the column ring airtight layer27can be connected to the columnar skeleton26using the semi open capacity space clamp, with high connection reliability.

Among them, the fourth tripod base plate type connector includes the fourth fixed base plate21and the fourth tripod22. After cutting and unfolding the fourth tripod base plate type connector along the axis direction, the cross-section of the fourth tripod22is umbrella shaped. From the radial section of the fourth fixed bottom plate21, it can be observed that the fourth fixed bottom plate21has a folding angle facing away from the fourth tripod, forming two connecting wings at the two folding angles of the fourth fixed bottom plate21. The fourth leg22has a length direction and a width direction. The fourth leg22is equipped with a connecting part and an umbrella shaped part, which is set at the top of the connecting part, so that the umbrella shaped part faces the connecting part and has protrusions towards the two connecting wings of the fourth leg22. The fourth tripod22is fixedly connected to the fourth fixed bottom plate22along the length direction of the fourth fixed bottom plate21using its connecting part, so as to form a semi open containment space clamp between the umbrella shaped part of the fourth tripod22and the two connecting wings of the fourth fixed bottom plate22. In this case, the column ring airtight layer27can be connected to the annular platform2using the semi open capacity space clamp, with high connection reliability.

Among them, the third tripod base plate type connector includes a third fixed base plate19and a third tripod20. After cutting and unfolding the third tripod base plate type connector along the axis direction, the cross-section of the third tripod20is umbrella shaped. From the radial section of the third fixed bottom plate19, it can be observed that the third fixed bottom plate19has a folding angle towards the direction close to the third tripod, forming two connecting wings at the two folding angles of the third fixed bottom plate19. The third tripod20has a length direction and a width direction, and the third tripod20is equipped with a connecting portion and an umbrella shaped portion. The umbrella shaped portion is set at the top of the connecting portion, so that the umbrella shaped portion faces the connecting portion and has protrusions towards the two connecting wings of the third tripod20. The third tripod20is fixedly connected to the third fixed bottom plate20along the length direction of the third fixed bottom plate19using its connecting part, so as to form a semi open containment space clamp between the umbrella shaped part of the third tripod20and the two connecting wings of the third fixed bottom plate20. In this case, the fan-shaped airtight layer4and the annular platform2can be connected to the outer ring skeleton12using the semi open capacity space clamp, with high connection reliability.

Among them, the dome sealing inner lining structure of the tripod type underground rock lining cavern also includes an extension part29and a sliding safety lock buckle5. The extension part29extends towards the distal end from the connecting part of the third leg20. The sliding safety buckle5includes a first connecting part and a second connecting part. The sliding safety buckle5is set at the extension portion29through the first connecting part, so that the sliding safety buckle5can slide along the extension portion29. One end of the second connecting part is fixedly connected to the first connecting part, and the other end of the second connecting part is used to externally connect accessory components. In this case, the extension29and the sliding safety lock5can be used to connect the accessory components externally. In this embodiment, the accessory components include a construction basket, making the construction process more convenient.

Among them, the dome sealing lining structure of the tripod type underground rock lining cave also includes a limiting member30and a roller31. The limit member30is fixedly set at the end of the extension part29. The first connecting part of the sliding safety buckle5is equipped with a box structure. The box structure is embedded with the limit member30, forming a storage space between the box structure and the limit member30. The roller31is set within the storage space, and the rolling direction of the roller31is consistent with the sliding direction of the sliding safety lock5. In this case, using roller31, the sliding friction force during the sliding process of sliding safety lock5can be converted into rolling friction force, making sliding more convenient.

Among them, the contour size of roller31matches the size of the storage space. In this case, it is possible to prevent the sliding safety latch5from tilting during the sliding process.

Among them, the dome sealing lining structure of the tripod type underground rock lining cavern also includes anchor rod6and gasket32. Anchor rod6runs through the connecting part and extension part29of the third tripod20, and is fixed with a nut to fix the other end of anchor rod6inside the surrounding rock25. Shim32is set between the limiting member30and the nut, where the inner diameter of Shim32is greater than the diameter of anchor rod6but less than the inner diameter of the nut, and the outer diameter of Shim32is greater than the outer diameter of the nut. In this case, the connection of anchor rod6is more stable.

Among them, auxiliary components include construction baskets. In this case, the tools used during the construction process can be placed in the construction basket, making the construction process more convenient.

Dome Sealing Lining Structure and Construction Method of Tripod Type Underground Rock Lined Cavern

Referring toFIG.27, the construction method of the dome sealing inner lining structure of the footrest type underground rock lining chamber provided by the present invention includes the following steps:

Step S1: Drill connection holes on concrete lining layer1,

Step S2: Place the dome skeleton3and the columnar skeleton26inside the concrete lining layer1, and apply connecting bolts and the fixed bottom plate of the foot frame bottom plate connectors provided by the dome skeleton3and the columnar skeleton26to connect and fix the dome skeleton3and the columnar skeleton26to the concrete lining layer1;

The construction process of the dome sealed inner lining structure of the foot frame type underground rock lined cavern provided by the embodiment of the present invention does not require the provision of an overall sealed inner lining structure in the concrete lining layer1. Instead, a skeleton is first laid out in the concrete lining layer1, and the airtight layer is connected between the skeletons, ultimately forming the dome sealed inner lining structure of the underground rock lined cavern. Compared to the overall sealing layer, the installation is more convenient, the work efficiency is higher, and the cost is lower.

Among them, the construction method of the dome sealing inner lining structure of the tripod type underground rock lining cavern also includes the following steps:

Step S4: Conduct experimental gas storage inside the dome sealing lining structure of a tripod type underground rock lined cavern, determine sealing performance, and monitor possible leak points.

In this case, once the dome sealing lining structure of the tripod type underground rock lined cavern experiences air leakage, timely measures can be taken to repair it.

Ring Sealing Liner

Referring toFIGS.28to48, the annular sealing lining provided in the embodiments of the present invention includes a foot rest bottom plate shaped fixed part and a sealing layer3. The tripod base plate shaped fixed part is in a circular shape, and the tripod base plate shaped fixed part includes a fixed base plate8and an umbrella shaped base plate2. After cutting and unfolding the tripod base plate shaped fixed part along the axis direction, the fixed base plate8has a length direction and a width direction, the umbrella shaped base plate2has a length direction and a width direction, and the umbrella shaped base plate2has a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part, so that the umbrella shaped part faces towards the connecting part and has protrusions on both sides of the length direction of the umbrella shaped base plate2. The umbrella shaped base plate2uses its connecting part to fix the fixed base plate8along the length direction of the fixed base plate8, forming a connection between the umbrella shaped part of the umbrella shaped base plate2and the fixed base plate8. Equipped with a semi open storage space clamp, the height of the semi open storage space near the connection part of the umbrella shaped tripod2is h1. The height of the open side of the semi open storage space near the umbrella shaped tripod2is h2, with h1>h2. The first end of the sealing layer3is embedded in the semi open capacity space clamp formed by the first leg bottom plate shaped fixed part, and the second end of the sealing layer3is embedded in the semi open capacity space clamp formed by the second leg bottom plate shaped fixed part. Among them, the center of the first leg bottom plate shaped fixed part and the second leg bottom plate shaped fixed part is aligned, and the sealing layer3is a multi-layer structure.

The annular sealing inner lining provided in the embodiment of the present invention can be embedded with a sealing layer3at the clamping mouth of a semi open containment space formed by a foot frame bottom plate shaped fixed part. Since the height of the semi open containment space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open containment space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the umbrella shaped foot frame2to form an embedding with the sealing layer3, thereby avoiding the displacement or detachment of the sealing layer3and ensuring airtightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the sealing layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced. Among them, the sealing layer3of the annular sealing lining provided by the present invention is made of a multi-layer structure, and each layer has a corresponding function, which can improve the airtightness and practicality of the sealing layer3.

Among them, refer toFIGS.28to48, and the inner lining of the ring seal also includes steel wire7. After the first end of the sealing layer3is wrapped with steel wire7, it is embedded in a semi open capacity space clamp formed by the first foot frame bottom plate shaped fixed part. Among them, the shape of the first end of the sealing layer3after wrapping steel wire7is adapted to the shape of the semi open capacity space clamp formed by the first foot frame bottom plate shaped fixed part. After the second end of the sealing layer3is wrapped with steel wire7, it is embedded in a semi open capacity space clamp formed by the second foot frame bottom plate shaped fixed part. Among them, the shape of the second end of the sealing layer3wrapped with steel wire7is adapted to the shape of the semi open capacity space clamp formed by the second foot frame bottom plate shaped fixed part. In this case, it is possible to ensure that the annular sealing liner is perfectly matched with the shape of the clamp formed by the foot frame bottom plate fixed part with a semi open storage space when embedded, thereby ensuring the airtightness between the annular sealing liner and the embedded part of the clamp formed by the foot frame bottom plate fixed part with a semi open storage space.

Among them, refer toFIGS.42to48, and the sealing layer3includes a rubber layer4and an airtight layer6. The rubber layer4is located on the inner side of the airtight layer6, wrapped with steel wire7. The remaining part of the airtight layer6is joined to the main body of the airtight layer6, and the remaining part of the rubber layer4is joined to the main body of the airtight layer6. In this case, the rubber layer (4) has a high friction force and the property of being deformable under compression. When it is embedded with the clamp formed by the foot frame bottom plate shaped part with a semi open storage space, it can prevent the sealing layer3from falling off from the clamp with a semi open storage space, and further ensure the airtightness of the annular sealing lining between the embedded part of the clamp formed by the foot frame bottom plate shaped part with a semi open storage space.

Among them, refer toFIGS.35to41, and the annular sealing lining also includes a curtain layer5. Cord layer5is set between rubber layer4and airtight layer6, and it is only located in the local area where the sealing layer3is wrapped with steel wire7. The curtain layer5has tensile performance, and in this case, it can avoid the possibility of the ring sealing lining provided by the present invention breaking due to the increase in internal pressure in the chamber during the operation of the compressed air energy storage power station. The embedded part of the ring sealing lining in the clamp with a semi open capacity space formed by the foot frame bottom plate shaped component can be avoided.

Among them, refer toFIGS.28-34, and the annular sealing lining also includes a curtain layer5. The main body and wrapping part of rubber layer4form the first layer, the main body and wrapping part of airtight layer6form the third layer, and the curtain layer5is set between the first and third layers to form an intermediate layer. The curtain layer5has tensile performance, and in this case, it can avoid the possibility of the ring sealing lining provided by the present invention breaking due to the increased pressure inside the chamber during the operation of the compressed air energy storage power station.

Among them, the clamp opening of the umbrella shaped tripod2has a rounded transition. In this case, the fracture caused by stress concentration can occur between the embedded part of the clamp with a semi open storage space formed by the ring sealing liner and the foot frame bottom plate shaped part, thereby extending the service life of the ring sealing liner provided in the embodiments of the present invention.

Among them, the fixed bottom plate8gradually increases in height in a streamlined manner from the outer edge of the fixed bottom plate8to the bottom of the connecting part of the umbrella shaped tripod2. In this case, when the annular sealing lining provided in the embodiment of the present invention is installed on the concrete lining layer1to form an underground rock gas storage chamber, even if the underground rock gas storage chamber is in an inflated state, it can avoid stress concentration caused by fracture between the annular sealing lining provided in the embodiment of the present invention and the fixed bottom plate8, thereby extending the service life of the annular sealing lining provided in the embodiment of the present invention.

The underground rock gas storage chamber provided by the embodiments of the present invention includes a concrete lining layer1and a ring sealing lining provided by the present invention. The first tripod base plate shaped fixing member is fixedly connected to one edge of the axial direction of the ring sealing liner, and the second tripod base plate shaped fixing member is fixedly connected to the other edge of the axial direction of the ring sealing liner, so that the sealing layer3is attached to the inner wall of the concrete lining layer1.

Underground Rock Gas Storage Cavern

The underground rock gas storage cavern provided in the embodiments of the present invention can utilize a semi open containment space clamp formed by a foot frame bottom plate shaped fixed part to embed a sealing layer3in the annular sealing lining. Among them, since the height of the semi open containment space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open containment space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the umbrella shaped foot frame2to form an embedding with the sealing layer3, thereby avoiding the displacement or detachment of the sealing layer3and ensuring air tightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the sealing layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced. Among them, the sealing layer3of the annular sealing lining provided by the present invention is made of a multi-layer structure, and each layer has a corresponding function, which can improve the airtightness and practicality of the sealing layer3.

Among them, the concrete lining layer1is connected in series in multiple sections, and the ring sealing lining is connected in series through the foot frame bottom plate shaped fixing piece in multiple sections. In this case, due to the clamp openings with semi open storage space formed on both sides of the tripod base plate shaped fixed part, the annular sealing lining after series connection can still ensure airtightness. Moreover, with the help of the tripod base plate shaped fixed part, the construction cost of series connection is low and installation is convenient.

Construction Methods for Underground Rock Gas Storage Caverns

The construction method of the underground rock gas storage cavern provided in the embodiments of the present invention includes the following steps:

According to the inner diameter of the underground chamber, a circular foot frame bottom plate shaped fixed component is installed on the inner wall of the concrete lining layer1of the underground chamber, so that the outer diameter of the circular foot frame bottom plate shaped fixed component matches the inner diameter of the underground chamber;

The sealing layer3is embedded in a circular footrest bottom plate shaped fixed part through a semi open capacity space clamp, so that the inner wall of the underground chamber forms the sealing inner lining structure provided in the embodiment of the present invention.

During the construction process of the underground rock gas storage cavern provided by the embodiments of the present invention, a semi open containment space clamp formed by a foot frame bottom plate shaped fixed part can be used to embed a sealing layer3in the ring type sealing lining. Among them, since the height of the semi open containment space near the connection part of the umbrella shaped foot frame is greater than the height of the semi open containment space near the open side position of the umbrella shaped foot frame, it is possible to use the outer edge of the umbrella shaped foot frame2to form a joint with the sealing layer3, thereby avoiding the displacement or detachment of the sealing layer3and ensuring air tightness. Therefore, it is formed inside the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welded steel plates, the cost is lower, it has good sealing performance, and the replacement of components is convenient and easier to maintain. On the premise of ensuring tightness, the airtightness can meet the usage requirements. Due to the circular shape of the bottom plate shaped fixed part of the tripod, it can ensure that the indoor lining of the underground tunnel is always circular and isotropic. In addition, the sealing layer3has a short construction period, and the components can be prefabricated. Compared to the traditional steel plate lining that requires on-site welding, it can save a lot of construction time, and the cost will also be lower. During maintenance, the damaged parts can be directly replaced. Among them, the sealing layer3of the annular sealing lining provided by the present invention is made of a multi-layer structure, and each layer has a corresponding function, which can improve the airtightness and practicality of the sealing layer3.

Among them, according to the inner diameter of the underground chamber, circular foot frame bottom plate shaped fixed parts are fixedly arranged on the inner wall of the underground chamber, so that the outer diameter of the circular foot frame bottom plate shaped fixed parts matches the inner diameter of the underground chamber, including the following steps:

Drill the first type of connecting hole on the inner wall of the underground chamber;

Adjust the position of the foot frame bottom plate fixed part so that the second connection hole of the foot frame bottom plate fixed part corresponds to the position of the first connection hole on the inner wall of the underground chamber;

Screw the fastening bolts into the first and second connecting holes simultaneously, so that the foot frame bottom plate shaped fixed part is fixed to the inner wall of the underground chamber.

In this case, the sealing inner lining structure can be stably fixed on the inner wall of the concrete lining layer1of the underground chamber through the first and second connection holes, as well as tightening bolts, and the cost is low.

Among them, the sealing layer3is embedded in a circular footrest bottom plate shaped fixed part through a semi open capacity space clamp, so that the inner wall of the underground chamber forms the sealing lining structure provided by the present invention, and further comprises the following steps:

Conduct gas storage tests on underground chambers to determine their sealing performance;

Real time monitoring of possible air leakage points in underground tunnels.

In this case, real-time monitoring of possible leakage points in the underground chamber can be carried out, and once a leakage occurs, it can be promptly known and remedied.

During the process of real-time monitoring of possible air leakage points in underground tunnels, the possible air leakage points include: the connection between sealing layer3and the foot frame bottom plate fixed part, the connection between the foot frame bottom plate fixed part and the umbrella shaped part, the connection between the fixed bottom plate8of the foot frame bottom plate fixed part and the inner wall of the underground tunnel, and one or more parts of the sealing layer3itself. In this case, real-time monitoring can be accurately carried out for possible air leakage points in underground tunnels.

Among them, real-time monitoring of possible air leakage points in underground tunnels includes the following steps:

Install gas flow monitoring instruments at potential leakage points in underground tunnels, and set location labels for each gas flow monitoring instrument;

Set an alarm threshold for the gas flow monitoring instrument based on its location;

When an abnormal gas flow alarm occurs, determine the location of the leakage point in the underground chamber based on the location label of the gas flow monitoring instrument that triggered the alarm.

In this case, once a possible leakage point in the underground chamber occurs, the leakage point in the underground chamber can be accurately determined based on the alarm information and the location label of the gas flow monitoring instrument, and emergency repair measures can be taken.

Slice Sealing Lining

Referring toFIGS.49-70, the sheet-type sealing lining provided by the embodiment of the present invention includes a plurality of foot-type base plate shaped parts and a sealing layer3. The plurality of foot-type base plate shaped parts are arranged in a crisscross pattern, forming a hollow between them. The foot-type base plate shaped parts include a fixed base plate8and an umbrella-shaped foot2. After cutting and unfolding the foot-type base plate shaped parts along the axis direction, the fixed base plate8has a length direction and a width direction, and the umbrella-shaped foot2has a length direction and a width direction. The umbrella-shaped foot2is provided with a connecting part and an umbrella-shaped part, and the umbrella-shaped part is arranged on the top of the connecting part, so that the umbrella-shaped part has protrusions towards the connecting part on both sides of the length direction of the umbrella-shaped foot2. The umbrella-shaped foot2is fixedly connected to the fixed base plate8along the length direction of the fixed base plate8using its connecting part, so that a semi-open accommodation space is formed between the umbrella-shaped part of the umbrella-shaped foot2and the fixed base plate8, with a height h1 near the connecting part of the umbrella-shaped foot2and a height h2 near the open side of the umbrella-shaped foot2. h1>h2. The sealing layer3is arranged in a semi-open accommodation space through a nip, where the sealing layer3is a multi-layer structure.

The annular sealing lining provided by the embodiment of the present invention can utilize the semi-open accommodation space formed by the foot-stand base plate type molding piece to embed the sealing layer3. Since the height of the semi-open accommodation space near the connection part of the umbrella-shaped foot-stand is greater than the height of the semi-open accommodation space near the open side of the umbrella-shaped foot-stand, it can be used to form a fit between the outer edge of the umbrella-shaped foot-stand2and the sealing layer3, thereby avoiding displacement or detachment of the sealing layer3and ensuring airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground chamber. Its construction period is shorter than that of welding steel plates, its cost is lower, it has good sealing performance, and its parts are easy to replace and maintain. On the premise of ensuring fastening, its airtightness can meet the use requirements. Since the foot-stand base plate type molding piece is annular, it can ensure that the underground chamber lining always remains annular and isotropic. In addition, the sealing layer3has a short construction period and can be prefabricated. Compared with the traditional steel plate lining that requires on-site welding, it can save a lot of construction time and cost, and it can be directly replaced when damaged during maintenance. The sealing layer3of the sheet-type sealing lining provided by the present invention is made of multiple layers, each layer having a corresponding function, which can make the sealing layer3better in terms of airtightness and practicality.

Referring toFIGS.49-70, the sheet-type sealing liner also includes a steel wire7. After the first end of the sealing layer3wraps around the steel wire7, it is embedded in the semi-open receiving space clamp formed by the first foot rest base plate shaped part. The shape of the first end of the sealing layer3after wrapping around the steel wire7is adapted to the shape of the semi-open receiving space clamp formed by the first foot rest base plate shaped part. After the second end of the sealing layer3wraps around the steel wire7, it is embedded in the semi-open receiving space clamp formed by the second foot rest base plate shaped part. The shape of the second end of the sealing layer3after wrapping around the steel wire7is adapted to the shape of the semi-open receiving space clamp formed by the second foot rest base plate shaped part. In this case, when the sheet-type sealing liner is embedded in the semi-open receiving space clamp formed by the foot rest base plate shaped part, it can fully match the shape of the clamp, thereby ensuring airtightness between the embedded part of the sheet-type sealing liner and the semi-open receiving space clamp formed by the foot rest base plate shaped part.

Among them, referring toFIG.64-FIG.70, the sealing layer3includes a rubber layer4and an airtight layer6. The rubber layer4is disposed on the inner side of the airtight layer6, and after wrapping around the steel wire7, the remaining part of the airtight layer6is joined to the main body of the airtight layer6, and the remaining part of the rubber layer4is joined to the main body of the airtight layer6. In this case, the rubber layer4has a large friction force and a property of being deformable under pressure. When it is fitted with a semi-open receiving space formed by a footrest bottom plate type molding part, it can prevent the sealing layer3from falling off from the semi-open receiving space, and further ensure the airtightness between the sheet-type sealing liner and the embedded part of the semi-open receiving space formed by the footrest bottom plate type molding part.

Among them, referring toFIG.57-FIG.63, the sheet-type sealing liner also includes a cord layer5. The cord layer5is disposed between the rubber layer4and the airtight layer6, and is only located in the part where the sealing layer3is wrapped by the steel wire7. The cord layer5has tensile properties, which can avoid the possibility of the sheet-type sealing liner provided by the present invention cracking during the operation of a compressed air energy storage power station due to an increase in internal pressure in the chamber, caused by the embedding part of the sheet-type sealing liner forming a semi-open receiving space with a clamping opening with a footrest bottom plate-type molding piece.

Referring toFIGS.2to8, the sheet-type sealing liner further includes a ply layer5. The main body and the surrounding part of the rubber layer4constitute the first layer, and the main body and the surrounding part of the airtight layer6constitute the third layer. The ply layer5is positioned between the first and third layers, forming an intermediate layer. The ply layer5has tensile properties, which can prevent the sheet-type sealing liner provided by the present invention from rupturing due to increased internal pressure in the cave during the operation of a compressed air energy storage power station.

The opening of the clamping port of the umbrella-shaped foot stand2is rounded. In this case, the stress concentration caused by the fracture of the sheet-type sealing lining between the embedded part of the clamping port formed with a semi-open receiving space with the foot stand base plate-type molding can be avoided, thereby extending the service life of the sheet-type sealing lining provided by the embodiment of the present invention.

Among them, the height of the fixed base plate8gradually increases from the outer edge of the fixed base plate8to the bottom end of the connecting part of the umbrella-shaped foot stand2in a streamlined shape. In this case, when the sheet-type sealing liner provided by the embodiment of the present invention is installed on the concrete lining layer1to form an underground rock gas storage chamber, even if the underground rock gas storage chamber is in an inflated state, it can avoid the occurrence of stress concentration between the sheet-type sealing liner provided by the embodiment of the present invention and the fixed base plate8, resulting in fracture, thereby extending the service life of the sheet-type sealing liner provided by the embodiment of the present invention.

Underground Rock Gas Storage Cavern

The underground rock gas storage cavern provided by the embodiment of the present invention includes a concrete lining layer1and a sheet-type sealing lining provided by the present invention. The foot-stand bottom plate type stereotypes include a plurality of axial foot-stand bottom plate type stereotypes and a plurality of circumferential foot-stand bottom plate type stereotypes, which are connected in a crisscross pattern to form a hollow space between a plurality of foot-stand bottom plate type skeletons. The outer dimensions of the plurality of axial foot-stand bottom plate type stereotypes and the plurality of circumferential foot-stand bottom plate type stereotypes are adapted to the internal dimensions of the concrete lining layer1, and the sheet-type sealing lining is disposed in the hollow space through a clamping opening with a semi-open accommodation space, so that the sealing layer3adheres to the inner wall of the concrete lining layer1.

The underground rock gas storage cavern provided by the embodiment of the present invention can utilize the semi-open containment space formed by the foot-plate type stereotypes to embed the sealing layer3in the sheet-type sealing lining. Since the height of the semi-open containment space near the connection part of the umbrella-shaped foot-plate is greater than the height of the semi-open containment space near the open side of the umbrella-shaped foot-plate, it can form a fit between the outer edge of the umbrella-shaped foot-plate2and the sealing layer3, thereby avoiding displacement or detachment of the sealing layer3and ensuring airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground cavern. Its construction period is shorter than that of welded steel plates, with lower cost and good sealing performance. In addition, it is easy to maintain due to its convenient replacement of parts. Under the premise of ensuring its fastening, its airtightness can meet the requirements of use. Since the foot-plate type stereotypes are annular, it can ensure that the underground cavern lining always remains annular and isotropic. In addition, the sealing layer3has a short construction period and can be prefabricated, which can save a lot of construction time and lower cost compared to traditional steel plate linings that require on-site welding. During maintenance, it is only necessary to replace the damaged parts directly. The sealing layer3of the sheet-type sealing lining provided by the present invention is made of multiple layers, each with a corresponding function, which can make the sealing layer3better in terms of airtightness and practicality.

Among them, the concrete lining layer1is connected in series in multiple sections, and the sheet-type sealing lining is connected in series through multiple sections of the foot-type base plate molding parts. In this case, due to the clamping openings formed on both sides of the foot-type base plate molding parts with semi-open accommodation spaces, the annular sealing lining after series connection can still ensure airtightness. Moreover, with the help of the foot-type base plate molding parts, the construction cost of series connection is low and installation is convenient.

Construction Method of Underground Rock Gas Storage Cavern

The construction method of the underground rock gas storage cavern provided by the embodiment of the present invention includes the following steps:

According to the inner diameter of the underground chamber, a footrest bottom plate type molding is fixedly arranged on the inner wall of the concrete lining layer1of the underground chamber. The footrest bottom plate type molding includes a plurality of axial footrest bottom plate type molding and a plurality of circumferential footrest bottom plate type molding, which are crisscrossed and connected to form a hollow between a plurality of footrest bottom plate type skeletons. The external dimensions of the plurality of axial footrest bottom plate type molding and the plurality of circumferential footrest bottom plate type molding are adapted to the internal dimensions of the concrete lining layer1;

The sealing layer3is embedded in the semi-open holding space of the annular footrest bottom plate shaped part, so that the inner wall of the underground chamber forms a sealed lining structure provided by the embodiment of the present invention.

During the construction process of the underground rock gas storage cavern provided by the embodiment of the present invention, the semi-open storage space formed by the footrest bottom plate shaped part can be used to embed the sealing layer3with a sheet-type sealing lining. Since the height of the semi-open storage space near the connection part of the umbrella-shaped footrest is greater than the height of the semi-open storage space near the open side of the umbrella-shaped footrest, the outer edge of the umbrella-shaped footrest2can be fitted with the sealing layer3to prevent displacement or detachment of the sealing layer3and ensure airtightness. Therefore, it is formed on the inner side of the concrete lining layer1of the underground cavern. Its construction period is shorter than that of welding steel plates, and its cost is lower. It has good sealing performance and is easy to maintain with convenient replacement of parts. On the premise of ensuring tightness, its airtightness can meet the requirements of use. Since the footrest bottom plate shaped part is circular, it can ensure that the underground cavern lining is always circular and isotropic. In addition, the sealing layer3has a short construction period and components can be prefabricated, which can save a lot of construction time and lower costs compared to traditional steel plate lining that requires on-site welding. During maintenance, it is only necessary to replace damaged parts directly. The sealing layer3of the sheet-type sealing lining provided by the present invention is made of multiple layers, each with a corresponding function, which can make the sealing layer3better in terms of airtightness and practicality.

Among them, according to the inner diameter of the underground chamber, a circular footrest bottom plate-type stereotype is fixedly arranged on the inner wall of the underground chamber, so that the outer diameter of the circular footrest bottom plate-type stereotype is adapted to the inner diameter of the underground chamber. The specific steps include the following:

Drilling a first type of connection hole on the inner wall of the underground chamber;

Adjust the position of the footrest base plate shaped part so that the second connection hole of the footrest base plate shaped part corresponds to the position of the first connection hole on the inner wall of the underground chamber;

The set bolt is simultaneously screwed into the first and second connection holes, so that the footrest base plate shaped part is fixed to the inner wall of the underground chamber.

In this case, the sealing lining structure can be stably fixed to the inner wall of the concrete lining layer1of the underground chamber through the first connection hole, the second connection hole, and the set bolt, and the cost is low.

Among them, the sealing layer3is embedded in the ring-shaped footrest bottom plate type molding part through a semi-open holding space, so that the inner wall of the underground chamber forms a sealed lining structure provided by the present invention, and the following steps are also included:

Conduct gas storage tests in underground chambers to determine their sealing performance;

Real-time monitoring is conducted for possible gas leakage points in underground caverns.

In this case, real-time monitoring of possible gas leakage points in underground caverns can be carried out to detect and remedy any gas leakage in a timely manner.

In the process of real-time monitoring of possible gas leakage points in the underground chamber, the possible gas leakage points include: the connection between the sealing layer3and the foot rest bottom plate molding part, the connection between the connection part of the foot rest bottom plate molding part and the umbrella-shaped part, the connection between the fixed bottom plate8of the foot rest bottom plate molding part and the inner wall of the underground chamber, and one or more parts of the sealing layer3itself. In this case, it is possible to accurately monitor the possible gas leakage points in the underground chamber in real time.

Among them, real-time monitoring of possible gas leakage points in underground caverns includes the following steps:

Gas flow monitoring instruments shall be installed at potential gas leakage points in underground chambers, and location labels shall be provided for each gas flow monitoring instrument;

Based on the location of the gas flow monitoring instrument, set the alarm threshold for the gas flow monitoring instrument;

When there is an abnormal gas flow alarm, the location of the gas leakage point in the underground chamber can be determined based on the location label of the gas flow monitoring instrument that triggered the alarm.

In this case, once a possible gas leak occurs in the underground chamber, the location of the gas leak can be accurately determined based on the alarm information and the location tag of the gas flow monitoring instrument, so that emergency repair measures can be taken.

Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications that fall within the scope of the invention.

Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include these modifications and variations.