Multi-dimensional space load and fire test system for tunnel structure, and method for implementing same

A multi-dimensional space load and fire test system for a tunnel structure, which includes a multi-point loading self-balancing reaction force system having a rigid platform, two furnace body side-sealing apparatuses (22) and a model assembly and transport apparatus (23) for transporting and situating a tunnel model are on a track on the rigid platform (9), the two furnace body side-sealing apparatuses (22) are respectively used for sealing two end openings of the tunnel model, a tower-type combustion vehicle can be placed within an inner cavity of the tunnel model, a plurality of sets of evenly distributed self-adaptive loading apparatuses (3) used for exerting loading forces on an outer wall of the tunnel model are connected between two reaction force frames (1) of the multi-point loading self-balancing reaction force system. The present system is able to perform loading on tunnel models having different cross section shapes, can be adapted to testing requirements of tunnel structures having different cross section shapes, and with respect to tunnel structure fire testing in particular, a camera of the present system has a large imaging angle of view, the present invention has good heat resistance, possesses both terminal imaging and distance measurement, and can amply satisfy a use requirement for the high temperature environment of a tunnel fire.

TECHNICAL FIELD

The present disclosure relates to the field of a fire testing system for a tunnel structure, in particular to a fire testing system having loading within a multi-dimensional space for a tunnel structure and an implementing method thereof.

BACKGROUND

With the advancement on industrialization and urbanization in China. The development and utilization of China's traffic tunnels (highways, railways, subways, subsea tunnels, and the like.) have entered a rapid growth stage. Although tunnel traffic brings us convenience, tunnel fire accidents tend to cause serious losses due to their characteristics such as rapid spread, difficult control and high risk. Tunnel structures is in the state of confining pressure stress during the daily operation process, so it is of great significance for the design and operation safety of the tunnels to evaluate their bearing capacities. Generally, the bearing capacities of the tunnel test models can be tested by the reaction loading systems. However, with the diversification of tunnel uses, the tunnel section shapes are constantly updated (circular, rectangular, horseshoe, elliptical, polygonal, double circular combined section, and the like.). The existing reaction force loading systems are generally only applicable to the loadings of circular cross-section tunnel models, which is difficult to satisfy the test requirements for tunnel structures with different cross-section shapes.

In addition, common fire tests for the tunnel structures often ignites a car that is about to be scrapped to carry out the experiment. On one hand, this test method wastes resources and causes great pollution, and on the other hand, the combustion process of the test is uncontrollable and it is difficult to simulate the impact of mobile fires in automobiles. In addition, it is necessary to use cameras and a thermal imaging apparatuses to acquire test data and image data during the fire tests. Common high-temperature cameras and thermal imagers are generally needed to place outside the high-temperature environment of the fires (i.e. room temperature environment), and indirectly imaged through the lens assembly extending into the high-temperature environment of the fires. The disadvantages of such high-temperature cameras and thermal imagers are that the imaging angles are narrow, and it is difficult to possess both thermal imaging and distance measurement, so it can not satisfy the use requirements for the high-temperature environment of the tunnel fires.

SUMMARY

For the above technical deficiencies, the objectives of the present disclosure are to provide a fire testing system having load within a multi-dimensional space for a tunnel structure and an implementing method thereof, which is able to perform loading on tunnel models having different cross section shapes, can be adapted to testing requirements of tunnel structures having different cross section shapes, and with respect to tunnel structure fire testing in particular, a camera of the present system has a large imaging angle of view, the present disclosure has good thermal resistance, possesses both thermal imaging and distance measurement, and can satisfy a use requirements for the high temperature environment of a tunnel fire.

In order to solve the above-mentioned technical problems, the following technical solutions are adopted in the present disclosure.

Provided in the present disclosure is a fire testing system having load within a multi-dimensional space for a tunnel structure. The system includes a multi-point loading self-balancing reaction force system provided with a rigid platform. Rail channels are arranged on the rigid platform and rails are laid in the rail channels. A slidable model assembly and transport apparatus and two furnace body side-sealing apparatuses are arranged on the rails. An upper end of the model assembly and transport apparatus is configured to place a tunnel model. The two furnace body side-sealing apparatuses are configured to seal both end openings of the tunnel model respectively. A steel rail is arranged on an inner wall of the tunnel model, and a tower-type combustion vehicle capable of projecting a flame outwards is arranged on the steel rail. The multi-point loading self-balancing reaction force system includes two reaction force frames arranged in parallel to each other on the rigid platform. A plurality of uniformly distributed sets of self-adaptive loading apparatuses configured to apply loading forces to an outer wall of the tunnel model are connected between the two reaction force frames. Loading ends of the self-adaptive loading apparatuses are capable of freely adjusting spatial locations. The reaction force frames are in an annular shape and are formed by connecting a plurality of segments of steel members through bolts. Each of the furnace body side-sealing apparatuses is provided with an air inlet pipe, a wind inlet pipe, a water inlet pipe and a water outlet pipe, respectively.

Each of the self-adaptive loading apparatuses includes a distribution beam. A plurality of uniformly distributed hydraulic cylinders are hinged on an upper end surface of the distribution beam. One end of each of the hydraulic cylinders away from the distribution beam is fixed to a bottom portion of an adjustment platform. An electric pushing rod and two fixing rods symmetrically arranged on both sides of the electric pushing rod are fixed on a top surface of the adjustment platform. The fixing rods and the electric pushing rod are slidably connected with an rotating block. Two rotating rods are symmetrically fixed on two ends of the rotating block. One end of each of the two rotating rods away from the rotating block is pinnedly connected into a pin hole preset on each of the two reaction force frames respectively.

Each of the self-adaptive loading apparatuses further includes an angle adjusting assembly configured to adjust an rotation angle of the rotating block and a locking assembly configured to limit displacing of the distribution beam in a direction of the fixing rods. A plurality of hydraulic supporting cylinders are arranged on an upper end surface of the rigid platform. Each of the hydraulic cylinders and each of the hydraulic supporting cylinders are connected to a hydraulic power station in an oil-way through a respective one of oil distribution stations, respectively.

Preferably, the angel adjusting assembly includes an adjusting top rod, a middle portion of the adjusting top rod is connected to a middle portion of an adjusting bottom rod through a first telescopic rod. Both ends of the adjusting top rod are slidably inserted into grooves preset on the two reaction force frames respectively. The adjusting bottom rod is fixedly connected to the rotating block. The first telescopic rod drives the rotating block to rotate through a stretch and contraction of the first telescopic rod. The electric pushing rod and the first telescopic rod are electrically controlled and are provided with a wireless receiving unit and a control unit controlling operations of the electric pushing rod and the first telescopic rod, respectively.

Preferably, the locking assembly includes an L-shaped fixing frame fixed on the rotating block. One end of the L-shaped fixing frame away from the rotating block is fixedly connected to a second telescopic rod. An extended end of the second telescopic rod is fixedly connected to a rigid wedge. A side surface of each of the fixing rods facing the electric pushing rod is provided with a plurality of uniformly arranged grooves. Two sides of the rigid wedge are capable of being embedded into the grooves to function with position locking with respect to the distribution beam. A middle portion of the rigid wedge is provided with a notch capable of accommodating the electric pushing rod. The second telescopic rod is electrically controlled and is provided with a wireless receiving unit and a control unit controlling an operation of the second telescopic rod, respectively.

Preferably, a hydraulic cylinder load sensor and a hydraulic cylinder displacement sensor are arranged on loading ends of the hydraulic supporting cylinder and the hydraulic cylinder, respectively. A hydraulic cylinder proportional valve is arranged between the hydraulic cylinder and the hydraulic supporting cylinder, and corresponding oil distribution stations respectively, to implement a respective independent hydraulic supply.

Preferably, the tower-type combustion vehicle includes a vehicle body. A plurality of combustion ports uniformly arranged in a rectangular array are arranged on two side surfaces and a top surface of the vehicle body, respectively. A plurality of sliding frames corresponding to the combustion ports one-to-one respectively are fixed on an inner wall of the vehicle body. Sliding plates are slidably connected with the sliding frames and are fixedly connected with combustion cylinders of combustors. Flame projecting ends of the combustion cylinders pass through the sliding plates, the sliding frames and the combustion ports, and protrude from the vehicle body. The combustion cylinders are capable of swinging up and down for projecting through sliding the sliding plates on the sliding frames. Air inlet holes and wind inlet holes on the combustors are in communication with each other through the air inlet pipes and the wind inlet pipes of the furnace body side-sealing apparatuses, and heat-resistant hoses, respectively. The air inlet pipes and the wind inlet pipes are externally connected to an external gas and a wind source respectively. A plurality of high-temperature-resistant panoramic detection apparatuses are arranged an outer wall of the vehicle body. The panoramic detection apparatuses are electrically connected with an external monitor. The monitor is externally connected to a Virtual Reality (VR) apparatus. An inspection port capable of accommodating a maintenance personnel for access is arranged on one end of the vehicle body.

Preferably, each of the sliding frames includes a wall plate fixed on an inner wall of the vehicle body. An arc-shaped plate is fixed on a side of the wall plate away from the inner wall of the vehicle body. Side plates are fixed between arc-shaped edges on two sides of the arc-shaped plate and the wall plate for sealing. A respective one of the sliding plates is slidably connected to a side surface of the arc-shaped plate away from the wall plate through arc-shaped sliding rails. An anti-sliding locking apparatus configured to limit displacing of the sliding plate is further arranged on the sliding plate. The wall plate, the arc-shaped plate and the sliding plate are provided respectively with a slot that is adapted and in communication with a respective one of the combustion ports and is configured for a respective one of the combustion cylinders to pass through. The sliding plate is fixedly connected to a bottom portion of the combustion cylinder. A portion of the sliding plate covering the arc-shaped plate has a same curvature as the arc-shaped plate.

Preferably, each of the panoramic detection apparatus includes a high-temperature-resistant spherical glass cover, the high-temperature-resistant spherical glass cover is fixed on a pedestal by a high-temperature-resistant clamp sleeved at a bottom portion of the spherical glass cover. A waterproof 360-degree camera is arranged in the high-temperature-resistant spherical glass cover. The waterproof 360-degree camera is fixed on an upper end surface of the pedestal through a waterflow separator arranged vertically. Two side edges of the waterflow separator abut on an inner wall of the high-temperature-resistant spherical glass cover. A space between the waterproof 360-degree camera and the pedestal is divided into a left cavity and a right cavity through the waterflow separator. A distance-measuring thermal imager (4-3) is further arranged in the right cavity and is fixed on one end of an endoscope, and another end of the endoscope is a peeping end and protrudes from the high-temperature-resistant spherical glass cover. The left cavity and the right cavity are respectively in communication with the water inlet pipe and the water outlet pipe on a respective one of the furnace body side-sealing apparatuses through the heat-resistant hoses. The water inlet pipe and the water outlet pipe are in communication with an external cooling pool. A thermal insulating cover is further arranged on a bottom portion of the pedestal. A tiny microphone and an electric motor are fixed in an inner cavity of the thermal insulating cover. A bottom portion of the thermal insulating cover is fixed on the vehicle body. The waterproof 360-degree camera, the distance-measuring thermal imager, the tiny microphone and the electric motor are electrically connected with the external monitor respectively. The monitor is externally connected with the Virtual Reality apparatus. A protruding shaft of the electric motor is inserted into and fixed at a center of the pedestal. And the pedestal is driven to rotate clockwise or counterclockwise by a forward or a reverse rotation of the electric motor.

Preferably, a front end of a gas main pipe is connected to the gas. A gas main valve, a pressure gauge, a flowmeter and a gas control main valve are arranged on the gas main pipe in sequence from front to rear. A plurality of gas sub pipes are branched from a bottom end of the gas main pipe. Each of the gas sub pipes is provided with a gas control sub valves. The air inlet holes in a same row of the combustors in the vehicle body are connect to one gas sub pipe through metal hoses. The gas main valve, the pressure gauge, the flowmeter, the gas control main valve and the gas control sub valve are electrically connected to an external gas control panel. The gas control panel is electrically connected to the monitor. The gas sub pipe is in communication with the inlet air hole of the combustor after passing through the inlet air pipe of a respective one of the furnace body side-sealing apparatuses.

The gas control main valve is a V-shaped-notch ball valve. The gas control main valve is driven pneumatically. A valve positioning of the gas control main valve is controlled by an analog output signal from a control system of the monitor. A positive displacement flowmeter is adopted as the flowmeter. The flowmeter includes a frequency pulse counter, two thermistor temperature probes and two pressure sensors. The thermistor temperature probes and the pressure sensors are arranged in pairs at an inlet and an outlet of the flowmeter (5-5) respectively.

Preferably, the model assembly and transport apparatus includes a model assembling platform and a model carrier loader that are arranged up and down with respect to each other. The model assembling platform is made of steel structure components and is provided with an arc-shaped component adapted with the tunnel model at an upper end of the model assembling platform. The model carrier loader is connected to a bottom portion of the model assembling platform by bolts, and the model carrier loader is electrically driven.

Provided in the present disclosure is further a method for implementing a fire testing system having loading within the multi-dimensional space for the tunnel structure. The method specifically includes the following steps.

In Step 1, a model assembling platform is hoisted to an upper portion of a model carrier loader, and the model assembling platform is connected with the model carrier loader by bolts. A tunnel model is hoisted to the model assembling platform in pieces by a bridge crane and the tunnel model is completed to be assembled on the model assembling platform. A hydraulic power station is controlled by a console. A wireless transmitting unit adapted with wireless receiving units on a first telescopic rod, an electric pushing rod and a second telescopic rod is arranged on the console.

In Step 2, the model carrier loader is transported to an inner cavity of two reaction force frames along rails. A plurality of hydraulic supporting cylinders located outside wheels of the model carrier loader are lifted to a lower surface of the model assembling platform after transporting the tunnel model to a preset testing position, and then the hydraulic supporting cylinders are locked.

In Step 3, the model carrier loader is separated from the model assembling platform. The model carrier loader is moved out of the test working position. A plurality of hydraulic supporting cylinders located inside the wheels of the model carrier loader are lifted to a lower surface of the model assembling platform, and then the hydraulic supporting cylinders are locked.

In Step 4, a signal is emitted by the console to control stretch and contraction of the first telescopic rod according an angel requirement on loading points of the test model to thus drive the rotating block to rotate, thereby adjusting an angle of the self-adaptive loading apparatus through an angel adjusting assembly on a self-adaptive loading apparatus.

In Step 5, a signal is emitted by the console after adjusting the angle according to a dimension of the test model to control the stretch and contraction of the electric pushing rod, thereby moving a distribution beam along a direction of fixing rods through a distance adjusting assembly to adjust a distance.

In Step 6, a signal is emitted by the console after adjusting the distance to control and push a rigid wedge out through the second telescopic rod, and the rigid wedge is inserted into grooves on the fixing rods, thereby implementing a locking function of loading positions through a locking assembly.

In Step 7, loading ends of a plurality of hydraulic cylinders on the distribution beams are controlled to extend, a preloading and a formal loading on the tunnel model are performed by the distribution beams, the distribution beams are flexibly connected to the tunnel model.

In Step 8, a tower-type combustion vehicle is driven into the tunnel model along steel rails. After the tower-type combustion vehicle reaches a preset position, two furnace body side-sealing apparatuses are respectively moved at two reaction force frames along the rail. After completing a fire protection and a heat insulation, the two furnace body side-sealing apparatuses are closed, the two furnace body side-sealing apparatuses are inserted into two end openings of the tunnel model, and a fire temperature filed is applied to an interior of the tunnel model to perform a fire test.

The beneficial effects of the present disclosure lie in the following.

1. The present disclosure is provided with two reaction force frames in an annular shape, which is convenient to implement an engineering test for a tunnel lining structure model, moreover, the present disclosure is provided with a rigid platform at a bottom portion of the reaction force frame, so that the system can implement a self-balancing when loaded.

2. The present disclosure is provided with a self-adaptive loading apparatus, which can perform loading tests for tunnel models with different cross section shapes.

3. A tower-type combustion vehicle that can simulate an automobile fire and that can be reused is designed in the present disclosure. The gas supply of each of the combustors is adjusted by controlling the gas control main valve and the gas control sub valve, so as to implement real-time control for the flame dimension and heat release, which can be used to simulate a single or a plurality of automobile fires. At the same time, different flame injection patterns in different directions can be selected by the combustor through the rotation, so as to simulate the actual situation on the automobile fires more accurately.

4. The present disclosure is provided with a model carrier loader, which enables the apparatus to have a walking function and can be used to simulate the situation on the mobile fires in automobiles.

5. A spherical glass cover made of a high-temperature-resistant material is adopted as the protective cover of the detection apparatus in present disclosure, which implements a panoramic view window of the detection apparatus for an external observation. The spherical glass cover is filled with colorless and transparent coolant, so that the electronic equipment placed in the spherical glass cover can be directly used in the high temperature environment of the fires.

6. The present disclosure is provided with apparatuses such as a waterproof 360-degree camera, a Virtual Reality apparatus, a distance-measuring thermal imager, a tiny microphone, and integrates the functions of camera, temperature measurement, distance measurement and sound measurement, so as to implement a panoramic presentation on the high temperature environment of the fires and a non-contact monitoring on the temperature in the whole field during a whole process.

DESCRIPTION OF REFERENCE NUMERALS

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are merely some rather than all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, other embodiments acquired by those of ordinary skilled in the art without creative effort all belong to the protection scope of the present disclosure.

As illustrated inFIGS.1to14, a testing fire system having loading within a multi-dimensional space for a tunnel structure includes a multi-point loading self-balancing reaction force system provided with a rigid platform9, two reaction force frames1in an annular shape, self-adaptive loading apparatuses3, distance adjusting assemblies2, rotating-shaft assemblies13, and hydraulic cylinder loading assemblies6. Two reaction force frames1are arranged on the rigid platform9in parallel, and the reaction force frames are formed by connecting a plurality of segments of steel members through bolts. Each of the distance-adjusting assemblies2includes an electric pushing-rod2-1, fixing rods2-2and an adjustment platform2-4. Each of the rotating-shaft assemblies includes rotating rods13-1and a rotating block13-2. Each of the hydraulic cylinder loading assemblies includes hydraulic cylinders6-1and a distribution beam6-2.

Rail channels9-1are arranged on the rigid platform9and rails are laid in the rail channels. A slidable model assembly and transport apparatus23and two furnace body side-sealing apparatuses22are arranged on the rails. An upper end of the model assembly and transport apparatus23is configured to place a tunnel model, and two furnace body side-sealing apparatuses22are configured to seal both end openings of the tunnel model respectively. A steel rail is arranged on an inner wall of the tunnel model, a tower-type combustion vehicle capable of injecting a flame outwards is arranged on the steel rail. Two reaction force frames1are arranged on the rigid platform9in parallel, and a plurality of uniformly distributed sets of self-adaptive loading loading apparatuses3are configured to apply loading forces to an outer wall of the tunnel model are connected between the two reaction force frames1. Loading ends of the self-adaptive loading apparatuses3are capable of freely adjusting spatial locations. The reaction force frames1are in an annular shape and are formed by connecting a plurality of segments of steel members through bolts. Each of the furnace body side-sealing apparatuses22is provided with an air inlet pipe, a wind inlet pipe, a water inlet pipe and a water outlet pipe, respectively.

Each of the self-adaptive loading apparatus3includes a distribution beam6-2. A plurality of unifromly distributed hydraulic cylinders6-1are hinged on an upper end surface of the distribution beam6-2. One end of each of the hydraulic cylinders6-1away from the distribution beam6-2is fixed to a bottom portion of the adjustment platform2-4. An electric pushing rod2-1and two fixing rods2-2symmetrically arranged on both sides of the electric pushing rod2-1are fixed on a top surface of the adjustment platform2-4. The fixing rods2-2and the electric pushing rod2-1are slidably connected with an rotating block13-2. Two rotating rods13-1are symmetrically fixed on two ends of the rotating block13-2. One end of each of the two rotating rods13-1away from the rotating block13-2is pinnedly connected into a pin hole preset on each of the two reaction force frames1respectively. Circular hole13-4and rectangular holes13-3through which the electric pushing rod2-1and the fixing rods2-2pass are provided on the rotating block13-2.

Each of the self-adaptive loading apparatuses3further includes an angle adjusting assembly7configured to adjust an rotation angle of the rotating block13-2and a locking assembly8configured to limit displacing of the distribution beam6-2in a direction of the fixing rods2-2. A plurality of hydraulic supporting cylinders10are arranged on an upper end surface of the rigid platform9, and each of the hydraulic cylinders6-1and each of the hydraulic supporting cylinders10are connected to a hydraulic power station12in an oil-way through a respective one of oil distribution stations11, respectively.

The angel adjusting assembly7includes an adjusting top rod7-1. A middle portion of the adjusting top rod7-1is connected to a middle portion of an adjusting bottom rod7-2through a first telescopic rod7-3. Both ends of the adjusting top rod7-1are slidably inserted into grooves preset on the two reaction force frames1respectively. The adjusting bottom rod7-2is fixedly connected to the rotating block13-2. The first telescopic rod drives the rotating block13-2to rotate through a stretch and contraction of the first telescopic rod7-3. The electric pushing rod2-1and the first telescopic rod7-3are electrically controlled and are provided with a wireless receiving unit and a control unit controlling operations of the electric pushing rod2-1and the first telescopic rod7-3, respectively.

The locking assembly8includes an L-shaped fixing frame8-1fixed on the rotating block13-2. One end of the L-shaped fixing frame8-1away from the rotating block13-2is fixedly connected to a second telescopic rod8-2. An extended end of the second telescopic rod8-2is fixedly connected to a rigid wedge8-3. A side surface of each of the fixing rods2-2facing the electric pushing rod2-1is provided with a plurality of uniformly arranged grooves. Two sides of the rigid wedge8-3are capable of being embedded into the grooves to function with position locking with respect to the distribution beam6-2. A middle portion of the rigid wedge8-3is provided with a notch capable of accommodating the electric pushing rod2-1. And the second telescopic rod8-2is electrically controlled and is provide with a wireless receiving unit and a control unit controlling an operation of the second telescopic rod8-2, respectively.

A hydraulic cylinder load sensor and A hydraulic cylinder displacement sensor are arranged on loading ends of the hydraulic supporting cylinder10and the hydraulic cylinder6-1, respectively, and a hydraulic cylinder proportional valve is arranged between the hydraulic cylinder6-1and the hydraulic supporting cylinder10, and corresponding oil distribution stations11respectively, so as to implement a respective independent hydraulic supply.

The tower-type combustion vehicle includes a vehicle body14. A plurality of combustion ports14-1uniformly arranged in a rectangular array are arranged on two side surfaces and a top surface of the vehicle body14, respectively. A plurality of sliding frames16corresponding to the combustion ports14-1in one-to-one respectively are fixed on an inner wall of the vehicle body14. Sliding plates22are slidably connected with the sliding frames16and are fixedly connected with combustion cylinders15-3of combustors15. Flame projecting ends of the combustion cylinders15-3pass through the sliding plates22, the sliding frames16and the combustion ports14-1, and protrude from the vehicle body14. The combustion cylinders15-3are capable of swinging up and down for projecting through sliding the sliding plates22on the sliding frames16. Air inlet holes15-1and wind inlet holes15-2on the combustors15are in communication with each other through the air inlet pipes and the wind inlet pipes of the furnace body side-sealing apparatuses22, and heat-resistant hoses, respectively. The air inlet pipes and the wind inlet pipes are externally connected to an external gas17and a wind source respectively. A plurality of high-temperature-resistant panoramic detection apparatuses4are arranged an outer wall of the vehicle body14, the panoramic detection apparatuses4are electrically connected with an external monitor20, the monitor20is externally connected to a Virtual Reality (VR) apparatus21, an inspection port14-7capable of accommodating a maintenance personally for access is arranged on one end of the vehicle body14.

Each of the sliding frames16includes a wall plate16-1fixed on an inner wall of the vehicle body14, an arc-shaped plate16-3is fixed on a side of the wall plate16-1away from the inner wall of the vehicle body14, side plates16-2are fixed between arc-shaped edges on two sides of the arc-shaped plate16-3and the wall plate16-1for sealing, a respective one of the sliding plates22is slidably connected to a side surface of the arc-shaped plate16-3away from the wall plate16-1through arc-shaped sliding rails16-4, an anti-sliding locking apparatus configured to limit displacing of the sliding plate22is further arranged on the sliding plate22. The wall plate16-1, the arc-shaped plate16-3and the sliding plate22are provided respectively with a slot that is adapted and in communication with a respective one of the combustion ports14-1and is configured for a respective one of the combustion cylinders15-3to pass through. The sliding plate22is fixedly connected to a bottom portion of the combustion cylinder15-3. A portion of the sliding plates13covering the arc-shaped plate16-3has the same curvature as the arc-shaped plate16-3.

Each of the panoramic detection apparatuses4includes a high-temperature-resistant spherical glass cover4-1. The high-temperature-resistant spherical glass cover4-1is fixed on a pedestal4-5by a high-temperature-resistant clamp sleeved at a bottom portion of the spherical glass cover4-1. A waterproof 360-degree camera4-2is arranged in the high-temperature-resistant spherical glass cover4-1. The waterproof 360-degree camera4-2is fixed on an upper end surface of the pedestal4-5through a waterflow separator4-2arranged vertically. Two side edges of the waterflow separator4-4abut on an inner wall of the high-temperature-resistant spherical glass cover4-1. A space between the waterproof 360-degree camera4-2and the pedestal4-5is divided into a left cavity and a right cavity through the waterflow separator4-4. A distance-measuring thermal imager4-3is further arranged in the right cavity and is fixed on one end of an endoscope4-6. Another end of the endoscope4-6is a peeping end and protrudes from the high-temperature-resistant spherical glass over4-1. The left cavity and the right cavity are respectively in communication with the water inlet pipe and the water outlet pipe on a respective one of the furnace body side-sealing apparatuses22through heat resistant hoses. The water inlet pipe and the water outlet pipe are in communication with an external cooling pool19. A thermal insulating cover4-7is further arrange on a bottom portion of the pedestal. A tiny microphone4-8and an electric motor4-9are fixed in an inner cavity of the thermal insulating cover4-7, a bottom portion of the thermal insulating cover4-7is fixed on the vehicle body14. The waterproof 360-degree camera4-2, the distance-measuring thermal imager4-3, the tiny microphone4-8and the electric motor4-9are electrically connected with the external monitor20respectively. The monitor20is externally connected with the Virtual Reality apparatus21, a protruding shaft of the electric motor4-9is inserted into and fixed at a center of the pedestal4-5, the connection wires are arranged in the water outlet pipe and the heat-resistant hoses, and the pedestal4-5is driven to rotate clockwise or counterclockwise by the forward or reverse rotation of the electric motor4-9.

A front end of a gas main pipe5-2is connected to the gas17. A gas main valve5-3, a pressure gauge5-4, a flowmeter5-5and a gas control main valve5-6are arranged on the gas main pipe5-2in sequence from front to rear. A plurality of gas sub pipes5-1are branched from a bottom end of the gas main pipe5-2. Each of the gas sub pipes5-1is provided with a gas control sub valves5-7. The air inlet holes15-1in the same row of the combustors15in the vehicle body14are connect to one gas sub pipe5-1through metal hoses. The gas main valve5-3, the pressure gauge5-4, the flowmeter5-5, the gas control main valve5-6and the gas control sub valve5-7are electrically connected to an external gas control panel5-8. The gas control panel5-8is electrically connected to the monitor20. The gas sub pipe5-1is in communication with the inlet air hole5-1of the combustor15after passing through the inlet air pipe of a respective one of the furnace body side-sealing apparatuses (22).

The gas control main valve5-3is a V-shaped-notch ball valve, and the gas control main valve5-3is driven pneumatically. A valve positioning of the gas control main valve5-3is controlled by an analog output signal from a control system of the monitor20. A positive displacement flowmeter is adopted as the flowmeter5-5, the flowmeter5-5includes a frequency pulse counter, two thermistor temperature probes and two pressure sensors, the thermistor temperature probes and the pressure sensors are arranged in pairs at an inlet and an outlet of the flowmeter5-5respectively.

The model assembly and transport apparatus23includes a model assembling platform23-2and a model carrier loader23-1that are arranged up and down with respect to each other. The model assembling platform23-2is made of steel structure components and is provided with an arc-shaped component adapted with the tunnel model at an upper end of the model assembling platform23-2. The model carrier loader23-1is connected to a bottom portion of the model assembling platform23-2by bolts, and the model carrier23-1is electrically driven.

Controllable split combustors are adopted as the combustors15.

The combustion ports14-1are in a rectangle shape, and the sliding frames16are made by welding a plurality of austenitic chromium-nickel heat-resistant steel-plates.

A ripple attenuator12-1is arrange at a high pressure outlet of the hydraulic power station12.

The vehicle body14, the model assembly and transport apparatus23, the furnace body side-sealing apparatuses22, the thermal insulating cover4-7and the sliding frames16are all made of the austenitic chromium-nickel heat-resistant steel-plates, and the rigid platform9may be provided with reserved holes to facilitate pipeline installation.

Multilayer insulation cotton are arrange on an inner wall of the tunnel model, an outer wall of the vehicle body14, one side of the furnace body side-sealing apparatus facing the tunnel model, an interior of the thermal insulating cover4-7, and the insulation cotton is a polycrystalline mullite fiber cotton sprayed with a high temperature curing agent.

The monitor20and the VR apparatus are arranged on the controller24.

This embodiment further provides a method for implementing a fire testing system having loading within the multi-dimensional space for the tunnel structure, which includes the following steps.

In Step 1, a model assembling platform23-2is hoisted to an upper portion of a model carrier loader23-1, and the model assembling platform is connected with the model carrier loader23-1by bolts. A tunnel model is hoisted to the model assembling platform23-2in pieces by a bridge crane and the tunnel model is completed to be assembled on the model assembling platform23-2. The hydraulic power station12is controlled by a console24. A wireless transmitting unit which adapted with wireless receiving units on a first telescopic rod7-3, an electric pushing rod2-1and a second telescopic rod8-2is arranged on the console.

In Step 2, The model carrier loader23-1is transported to an inner cavity of two reaction force frames1along rails. A plurality of hydraulic supporting cylinders10located outside wheels of the model carrier loader23-1are lifted to a lower surface of the model assembling platform23-2after transporting the tunnel model to a preset testing position, and then the hydraulic supporting cylinders are locked.

In Step 3, the model carrier loader23-1is separated from the model assembling platform23-2. The model carrier loader23-1is moved out of the test working position. A plurality of hydraulic supporting cylinders10located inside the wheels of the model carrier loader23-1are lifted to a lower surface of the model assembling platform23-2, and then the hydraulic supporting cylinders10are locked.

In Step 4, an angel adjusting assembly7on the self-adaptive loading apparatus3stretches and contracts the rod body of the first telescopic7-3according an angle requirement on loading points of the test model, thereby driving the rotation of the rotating block13-2to implement the angle adjustment of the self-adaptive loading apparatus3. A wireless signal is sent out through the console24, the wireless receiving unit corresponding to the first telescopic rod7-3receives the signal, and then transmits the signal to the corresponding control unit, and the control unit controls the first telescopic rod7-3to work.

In Step 5, after the angle adjustment is completed, according to a dimension of the test model, the distance adjusting assembly7stretches and contracts the rod body of the electric pushing rod2-1, so that the distribution beams6-2move along a direction of the fixing rod2-2to adjust the distance. A wireless signal is sent out through the external console24, the wireless receiving unit corresponding to the electric pushing rod2-1receives the signal, and then transmits the signal to the corresponding control unit, and the control unit controls the electric pushing rod2-1to work.

In Step 6, after the distance adjustment is completed, the locking assembly8pushes out the rigid wedge8-3through the second telescopic rod8-2and inserts the rigid wedge8-3into the grooves on the fixing rods2-2to implement a locking function of the loading positions. A wireless signal is sent out through the external console24, the wireless receiving unit corresponding to the second telescopic rod8-2receives the signal, and then transmits the signal to the corresponding control unit, and the control unit controls the second telescopic rod8-2to work.

In Step 7, loading ends of a plurality of hydraulic cylinders6-1on the distribution beams6-2are controlled to extend, a preloading and a formal loading on the tunnel model are performed by the distribution beams6-2, the distribution beams6-2are flexibly connected to the tunnel model.

In Step 8, a tower-type combustion vehicle is driven into the tunnel model along steel rails. After the tower-type combustion vehicle reaches a preset position, two furnace body side-sealing apparatuses22are respectively moved at two reaction force frames1along the rail. After a fire protection and a heat insulation are completed, the two furnace body side-sealing apparatuses22are closed, the two furnace body side-sealing apparatuses are inserted into two end openings of the tunnel model, and a fire temperature filed is applied to an interior of the tunnel model to perform a fire test.

It will be apparent that those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations to the present disclosure fall within the scope of the appended claims and its equivalent technology, the present disclosure is also intended to cover these modifications and variations.