Abstract:
A concrete slab structural member comprises a frame of cold bend thin wall steel profiles and concrete enclosing the same, in which the main surfaces of two longitudinal cold bend thin wall steel profiles ( 51, 52, 91, 92 ) included in each longitudinal cold bend thin wall steel profile keel are parallel to the main surface of the concrete slab, the two longitudinal cold bend thin wall steel profiles ( 51, 52, 91, 92 ) are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete slab, so that a space ( 200 ) for the concrete to flow through when it is poured is left between the two longitudinal cold bend thin wall steel profiles. Also provided is a construction method for building a concrete slab structural member. The structural member has avoided or reduced as much as possible the problem of the flowing of concrete being hindered when it is poured, due to the placement of the cold bend thin wall steel profiles perpendicular to the concrete slab, which exists in the concrete structural member with cold bend thin wall steel profiles in the prior art, and the problem of cold bridges that is created by the perpendicularly placed cold bend thin wall steel profiles in the concrete formed after pouring the same.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention belongs to the field of building structural members and construction methods and in particular, relates to a concrete slab structural member and a construction method for pouring the concrete slab. 
       DESCRIPTION OF THE PRIOR ART 
       [0002]    There are concrete slab structural members with cold bend thin wall steel profiles as the frame according to the prior art. According to the prior art, the frame of cold bend thin wall steel profiles comprises a plurality of vertical cold bend thin wall steel profiles spaced apart laterally and arranged in parallel. The main surfaces of the cold bend thin wall steel profiles are perpendicular to the main surface of the concrete slab structural member. As such, a space is formed between every two adjacent cold bend thin wall steel profiles, which results in some problems. For example: 1) when concrete is poured between the external concrete form and the internal concrete form, the flowing of concrete is hindered by the cold bend thin wall steel profiles, the concrete pouring efficiency is low, and the compactness and homogeneity of the poured concrete are affected; 2) The main surfaces of the cold bend thin wall steel profiles are perpendicular to the main surface of the concrete slab structural member, such that the cold bend thin wall steel profiles extend in the direction from indoor to outdoor and a cold bridge is formed between the indoor and the outdoor, which affects the thermal insulation effect of the wall panels. 
       SUMMARY OF THE INVENTION 
       [0003]    One object of the present invention is to provide a new concrete slab structural member that combines cold bend thin wall steel profiles and concrete, which can avoid or reduce as much as possible the problem of the flowing of concrete being hindered when it is poured, due to the placement of the main surfaces of the cold bend thin wall steel profiles perpendicular to the main surface of the concrete slab structural member, which exists in the concrete structural member with cold bend thin wall steel profiles in the prior art. The other object of the present invention is to provide a to solve the problem of cold bridge that is created by the perpendicularly placed cold bend thin wall steel profiles in the concrete formed after pouring the same. 
         [0004]    The technologies according to the present invention are as follows: 
         [0005]    First basic technology: 
         [0006]    A concrete slab structural member, comprising: a frame of cold bend thin wall steel profiles; concrete that encloses the frame of cold bend thin wall steel profiles; the frame of cold bend thin wall steel profiles comprises a plurality of longitudinal cold bend thin wall steel profile keels ( 5 ,  9 ) that are spaced apart along the lateral extension direction of the main surface of the concrete slab structural member and placed in parallel to one another; wherein, each longitudinal cold bend thin wall steel profile keel comprises two longitudinal cold bend thin wall steel profiles ( 51 ,  52 ,  91 ,  92 ), the main surfaces of two longitudinal cold bend thin wall steel profiles are parallel to the main surface of the concrete slab structural member, the two longitudinal cold bend thin wall steel profiles are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete slab structural member, so that a space ( 200 ) for the concrete to flow through when it is poured is left between the two longitudinal cold bend thin wall steel profiles. The space left between the two longitudinal cold bend thin wall steel profiles is filled with concrete. 
         [0007]    The present invention has the following advantageous effects: 
         [0008]    In the concrete slab structural member of the present invention, each longitudinal cold bend thin wall steel profile keel comprises two longitudinal cold bend thin wall steel profiles, the main surfaces of the two longitudinal cold bend thin wall steel profiles are parallel to the main surface of the concrete slab structural member, the two longitudinal cold bend thin wall steel profiles are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete slab structural member, so that a space for the concrete to flow through when it is poured is left between the two longitudinal cold bend thin wall steel profiles. This avoids the problem created by the placement of the main surfaces of the cold bend thin wall steel profiles perpendicular to the main surface of the concrete slab structural member according to the prior art. 1) Regarding the problem 1) mentioned in the section of Description of the Prior Art, since the longitudinal cold bend thin wall steel profiles of the present invention extend in the direction parallel to the main surface of the concrete slab structural member, they will not cause the same big hindrance as the prior art to the flowing of the poured concrete along the lateral extension direction of the concrete slab and along the concrete forms, and consequently the concrete can smoothly flow in the direction of the main surfaces of thin wall steel profiles. This can improve the pouring efficiency, and improve the compactness and homogeneity of the concrete that has been poured into the space between the internal and external concrete forms; regarding the problem 2) mentioned in the section of Description of the Prior Art, the cold bend thin wall steel profiles of the present invention extend in the direction parallel to the main surface of the concrete slab structural member (perpendicular to the direction from indoor to outdoor), which avoids the formation of a cold bridge between the indoor and the outdoor. Another aspect of the present invention is to solve the cold bridge cold bridge problem that is created by the perpendicularly placed cold bend thin wall steel profiles to the main surface of the concrete slab in the concrete formed after pouring the same in the prior art. 
         [0009]    Relative to the cold bend thin wall steel profile and concrete structure according to the prior art, meanwhile, the cold bend thin wall steel profile and concrete structure according to the present invention further has other advantages. Damages to a concrete slab due to stress take place primarily in areas proximate to the two external main surfaces of the slab, while reinforcing bars are not needed in the middle of the slab along the direction perpendicular to the main surfaces of the slab. In the structure according to the prior art, however, the cold bend thin wall steel profiles are placed perpendicular to the main surfaces of the concrete slab. As a result, the portion of the cold bend thin wall steel profiles at the middle of the slab cannot fully play their role in bearing loads, leading to the waste of steel. While in the present invention, each longitudinal cold bend thin wall steel profile keel comprises two longitudinal cold bend thin wall steel profiles, the main surfaces of the two longitudinal cold bend thin wall steel profiles are parallel to the main surface of the concrete slab structural member, the two longitudinal cold bend thin wall steel profiles are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete slab structural member, so that a space is left between the two longitudinal cold bend thin wall steel profiles. Therefore, there actually is no reinforcing bar in the middle of the concrete slab, and the steel is mostly concentrated at the two surfaces of the slab that need reinforcing bars the most, which significantly improves the utilization of steel. Relative to the cold bend thin wall steel profile structure in the prior art, it saves steel. 
         [0010]    In the present invention, moreover, the main surfaces of the two longitudinal cold bend thin wall steel profiles contained in each longitudinal cold bend thin wall steel profile keel are parallel to the main surface of the concrete slab structural member, and the two longitudinal cold bend thin wall steel profiles are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete slab structural member, which forms a more stable self-support and can reduce or eliminate additional supports to the concrete forms. 
         [0011]    When modular concrete forms are combined with the frame structure of cold bend thin wall steel profiles, moreover, a complete industrialized building system will be formed. This system relates to building design and building structure, and moreover, relates to building construction. With an extensive application range, this system has a lot of advantages. Specific examples are as follows: 
         [0012]    1. When modular concrete forms are combined with the frame structure of cold bend thin wall steel profiles according to the present invention to replace thread steel with cold bend thin wall steel profiles, the stability of temporary structure and accuracy of sizes are significantly improved without increasing the total steel consumption, such that the construction process is more convenient, rapid and reliable, and the use of temporary support is effectively reduced. 
         [0013]    2. Due to the change of the construction method, the workload of field construction is greatly reduced (by eliminating the existing steel bar bundling operation, simplifying the concrete form support operation or eliminating the concrete form support), thereby saving labor, reducing work intensity, and shortening the construction period. As estimated, the application of the new industrialized building assembly technique formed by the combination of the cold bend thin wall steel profile frame and concrete structure according to the present invention and the modular concrete forms can save labor by 35%˜50% and shorten the construction period by more than 40%. 
         [0014]    3. When permanent concrete forms are used in the cold bend thin wall steel profile frame and concrete structure according to the present invention, the effect of saving work hours and shortening construction period is further enhanced. 
         [0015]    4. When the slab of the cold bend thin wall steel profile frame and concrete structure according to the present invention is formed, a composite steel-concrete construction can be formed. The composite steel-concrete construction is one of the structures that are currently recognized to have the most excellent anti-earthquake, lasting and fire-resistant properties. Its anti-earthquake property is far better than the masonry structure, its fire resistant property and lasting property are far better than the steel structure, and its anti-earthquake and structural ductility are far better than those of the reinforced concrete structure according to the prior art. 
         [0016]    Preferred technologies of the first basic technology and other basic technologies of the present invention will be described below, respectively: 
         [0017]    Preferred technologies of the first basic technology 
         [0018]    Preferably, the two longitudinal cold bend thin wall steel profiles are fixedly connected through connection steel plates ( 61 ,  62 ) spaced apart along the longitudinal direction of the cold bend thin wall steel profiles. 
         [0019]    Further preferably, the longitudinal cold bend thin wall steel profiles ( 51 ,  52 ) included in each longitudinal cold bend thin wall steel profile keel ( 5 ) have a plurality of through holes ( 191 ,  192 ) on the rolling keel edge distributed along the lengthwise direction thereon for concrete to flow through when it is poured, and the connection steel plates ( 61 ,  62 ) have holes ( 193 ,  194 ) on the rolling edge for concrete to flow through when it is poured. 
         [0020]    Preferably, the frame of cold bend thin wall steel profiles further comprises: a lateral connection cold bend thin wall steel profile keel, which comprises lateral cold bend thin wall steel profiles ( 81 ,  82 ); a diagonal support cold bend thin wall steel profile keel, which comprises diagonal cold bend thin wall steel profiles ( 31 ,  32 ); a plurality of longitudinal cold bend thin wall steel profile keels placed in parallel are connected through said lateral connection cold bend thin wall steel profile keel, said diagonal support cold bend thin wall steel profile keel is connected with said longitudinal cold bend thin wall steel profile keel, said longitudinal cold bend thin wall steel profile keel, said lateral connection cold bend thin wall steel profile keel and said diagonal support cold bend thin wall steel profile keel are connected to form a stable overall rigid structure. 
         [0021]    Preferably, the concrete slab structural member is a concrete wall slab structural member, and said longitudinal cold bend thin wall steel profile keel is a vertical cold bend thin wall steel profile keel that extends vertically. More preferably, a starting platform ( 113 ) is disposed at the bottom. Said starting platform is fixed with a starting sleeve ( 4 ) thereon, said starting sleeve ( 4 ) has starting vertical cold bend thin wall steel profile keels ( 41 ,  42 ) that project upwardly, and said longitudinal cold bend thin wall steel profiles ( 51 ,  52 ) are fixedly connected with said starting longitudinal cold bend thin wall steel profile keels ( 41 ,  42 ). 
         [0022]    Alternatively, the concrete slab structural member is preferably a concrete floor slab structural member or roof slab structural member. 
         [0023]    A further preferred technology is: said concrete wall slab structural member is a cast-in-place concrete wall slab structural member, which further comprises an external concrete form ( 131 ) and an internal concrete form ( 132 ), said external concrete form ( 131 ) is disposed at one side of said frame of cold bend thin wall steel profiles, said internal concrete form ( 132 ) is disposed at another side of said frame of cold bend thin wall steel profiles, both said external concrete form and said internal concrete form are fixedly connected with said frame of cold bend thin wall steel profiles, both said external concrete form and said internal concrete form have a space formed with said longitudinal cold bend thin wall steel profiles ( 51 ,  52 ), and said concrete is disposed between said external concrete form and said internal concrete form and covers said frame of cold bend thin wall steel profiles. 
         [0024]    A further preferred technology is: the holes ( 191 ,  192 ) on the rolling keel edge of the two longitudinal cold bend thin wall steel profiles are opposite each other, and the running direction of said holes on the rolling keel edge is perpendicular to the main surface of said concrete slab structural member; said concrete slab structural member further comprises a tension connection bolt ( 111 ), an external tension bolt ( 161 ), an internal tension bolt ( 162 ), an external tension sleeve ( 171 ), an internal tension sleeve ( 172 ), the tension connection bolt ( 111 ) runs through some of the holes ( 191 ,  192 ) on the rolling keel edge, said external tension sleeve ( 171 ) is disposed between said external concrete form ( 131 ) and the longitudinal cold bend thin wall steel profile ( 51 ) of the two longitudinal cold bend thin wall steel profiles included in each longitudinal cold bend thin wall steel profile keel that is located at the external side, said internal tension sleeve ( 172 ) is disposed between said internal concrete form ( 132 ) and the longitudinal cold bend thin wall steel profile ( 52 ) of the two longitudinal cold bend thin wall steel profiles included in each longitudinal cold bend thin wall steel profile keel that is located at the internal side; two ends of said tension connection bolt ( 111 ) run through said holes on the rolling keel edge, respectively, to be connected with said external tension sleeve and said internal tension sleeve, said external tension bolt ( 161 ) runs through said external concrete form ( 131 ) to connect with said external tension sleeve ( 171 ) so as to fixedly connect said external concrete form with said longitudinal cold bend thin wall steel profile keel, and said internal tension bolt ( 162 ) runs through said internal concrete form ( 132 ) to connect with said internal tension sleeve ( 171 ) so as to fixedly connect said internal concrete form with said longitudinal cold bend thin wall steel profile keel. 
         [0025]    A yet further preferred technology is: an external vertical concrete form keel ( 121 ) and an external lateral concrete form keel ( 141 ) are disposed between said external tension bolt ( 161 ) and said external concrete form ( 131 ) for providing support to the external concrete form, an internal vertical concrete form keel ( 122 ) and an internal lateral concrete form keel ( 142 ) are disposed between said internal tension bolt ( 162 ) and said internal concrete form ( 132 ) for providing support to the internal concrete form, said external tension bolt runs through an external gasket ( 151 ), the external lateral concrete form keel, the external vertical concrete form keel and the external concrete form sequentially to connect with said external tension sleeve ( 171 ), and said internal tension bolt runs through an internal gasket ( 152 ), the internal lateral concrete form keel, the internal vertical concrete form keel and the internal concrete form sequentially to connect with said internal tension sleeve ( 172 ). 
         [0026]    A further preferred technology is: there is threaded connection between said tension connection bolt ( 111 ), said external tension bolt ( 161 ) and said external tension sleeve ( 171 ), there is threaded connection between said tension connection bolt ( 111 ), said internal tension bolt ( 162 ) and said internal tension sleeve ( 172 ), both of the two longitudinal cold bend thin wall steel profiles included in each longitudinal cold bend thin wall steel profile keel are C shaped steel profiles, and both said external concrete form and said internal concrete form are modular concrete forms. 
         [0027]    The second basic technology and preferred technologies thereof 
         [0028]    The second basic technology relates to a construction method for pouring the concrete slab, characterized in that it comprises the following steps: a step of installing a frame of thin wall steel profiles, wherein a plurality of longitudinal cold bend thin wall steel profile keels ( 5 ,  9 ) are spaced apart along the lateral extension direction of the main surface of the concrete slab and placed in parallel to one another, each of the longitudinal cold bend thin wall steel profile keels ( 5 ,  9 ) comprises two longitudinal cold bend thin wall steel profiles ( 51 ,  52 ,  91 ,  92 ), the main surfaces of said longitudinal cold bend thin wall steel profiles are set to be parallel to the main surface of the concrete slab such that the two longitudinal cold bend thin wall steel profiles are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete slab, and that a space ( 200 ) for the concrete to flow through when it is poured is left between the two longitudinal cold bend thin wall steel profiles; a step of installing forms, wherein it comprises: installing external concrete forms ( 131 ,  202 ) on one side of said frame of cold bend thin wall steel profiles such that they are fixedly connected with the frame of cold bend thin wall steel profiles; a step of pouring concrete, wherein said concrete is made to flow through said space ( 200 ) smoothly. 
         [0029]    A first preferred technology based on the second basic technology comprises a step of connecting said two longitudinal cold bend thin wall steel profiles in the step of installing the frame of thin wall steel profiles, wherein connection steel plates ( 61 ,  62 ) are used to fixedly connect the two longitudinal cold bend thin wall steel profiles at positions spaced apart along the longitudinal direction of the cold bend thin wall steel profiles. 
         [0030]    In a second preferred technology based on the above preferred technology, the longitudinal cold bend thin wall steel profiles ( 51 ,  52 ,  91 ,  92 ) included in each longitudinal cold bend thin wall steel profile keel ( 5 ,  9 ) have a plurality of through holes ( 191 ,  192 ) on the rolling keel edge distributed along the lengthwise direction thereon for concrete to flow through when it is poured, and the connection steel plates ( 61 ,  62 ) have holes ( 193 ,  194 ) on the rolling edge for concrete to flow through when it is poured, and in the step of pouring concrete, said concrete flows through said through holes ( 191 ,  192 ) on the rolling keel edge and the holes on the rolling edge of said connection steel plates. 
         [0031]    In the construction method for pouring the concrete slab of a third preferred technology based on the second basic technology, the concrete slab is a concrete wall slab, said longitudinal cold bend thin wall steel profiles are vertical cold bend thin wall steel profiles, and said step of installing forms further comprises: installing an internal concrete form ( 132 ) at another side of said frame of cold bend thin wall steel profiles, and fixedly connecting it with the frame of thin wall steel profiles; in the step of pouring concrete, pouring concrete between said external concrete faun and said internal concrete form. 
         [0032]    In a fourth preferred technology based on the second basic technology, the step of installing the frame of thin wall steel profiles comprises: using a lateral connection cold bend thin wall steel profile keel that comprises lateral cold bend thin wall steel profiles ( 81 ,  82 ) to connect a plurality of longitudinal cold bend thin wall steel profile keels placed in parallel, and connecting a diagonal support cold bend thin wall steel profile keel that comprises diagonal cold bend thin wall steel profiles ( 31 ,  32 ) with the vertical cold bend thin wall steel profile keel to form a stable overall rigid structure. 
         [0033]    In a fifth preferred technology based on the construction method for pouring the concrete slab of the third preferred technology, the step of installing the frame of thin wall steel profiles comprises: preparing a starting platform ( 113 ) at the bottom, fixing a starting sleeve ( 4 ) that comprises a starting slab ( 112 ) and starting vertical cold bend thin wall steel profile keels ( 41 ,  42 ) on said starting platform, and fixedly connecting said longitudinal cold bend thin wall steel profiles ( 51 ,  52 ) with said starting vertical cold bend thin wall steel profile keels ( 41 ,  42 ). 
         [0034]    In a sixth preferred technology based on the construction method for pouring the concrete slab of the third preferred technology, when said external concrete form is installed, a space is left between said external concrete form and the vertical cold bend thin wall steel profile ( 51 ) located at the external side, when said internal concrete form is installed, a space is left between said internal concrete form and the vertical cold bend thin wall steel profile ( 52 ) located at the internal side, and when concrete is poured, said concrete fills up the space between said external concrete form and said internal concrete form and covers said frame of cold bend thin wall steel profiles. 
         [0035]    In a seventh preferred technology based on the construction method for pouring the concrete slab of the second preferred technology, the concrete slab is a concrete wall slab, said longitudinal cold bend thin wall steel profiles are vertical cold bend thin wall steel profiles, and said step of installing forms further comprises: installing an internal concrete form ( 132 ) at another side of said frame of cold bend thin wall steel profiles, and fixedly connecting it with the frame of thin wall steel profiles; in the step of pouring concrete, pouring concrete between said external concrete form and said internal concrete form; in the step of installing the frame of thin wall steel profiles, the holes ( 191 ,  192 ) on the rolling keel edge of the two longitudinal cold bend thin wall steel profiles are made to be opposite each other such that the running direction of said holes on the rolling keel edge is perpendicular to the main surface of said concrete wall slab, running the tension connection bolt ( 111 ) through some of the holes ( 191 ,  192 ) on the rolling keel edge such that two ends of said tension connection bolt ( 111 ) run through said holes on the rolling keel edge, respectively, to be connected with said external tension sleeve and said internal tension sleeve; the step of installing said external concrete form ( 131 ) comprises: running said external tension bolt ( 161 ) through said external concrete form ( 131 ) to connect with said external tension sleeve ( 171 ) so as to fixedly connect said external concrete form with said longitudinal cold bend thin wall steel profile keel, and the step of installing said internal concrete form ( 131 ) comprises: running said internal tension bolt ( 162 ) through said internal concrete form ( 132 ) to connect with said internal tension sleeve ( 171 ) so as to fixedly connect said internal concrete form with said longitudinal cold bend thin wall steel profile keel. An eighth preferred technology based on the above preferred technologies further comprises disposing an external vertical concrete form keel ( 121 ) and an external lateral concrete form keel ( 141 ) between said external tension bolt ( 161 ) and said external concrete form ( 131 ) for providing support to the external concrete form, and disposing an internal vertical concrete form keel ( 122 ) and an internal lateral concrete form keel ( 142 ) between said internal tension bolt ( 162 ) and said internal concrete form ( 132 ) for providing support to the internal concrete form; when running said external tension bolt ( 161 ) through said external concrete form ( 131 ) to connect with said external tension sleeve ( 171 ), running said external tension bolt through an external gasket ( 151 ), the external lateral concrete form keel, the external vertical concrete form keel and the external concrete form sequentially to connect with said external tension sleeve ( 171 ), and when running said internal tension bolt ( 162 ) through said internal concrete form ( 132 ) to connect with said internal tension sleeve ( 171 ), running said internal tension bolt through an internal gasket ( 152 ), the internal lateral concrete form keel, the internal vertical concrete form keel and the internal concrete form sequentially to connect with said internal tension sleeve ( 172 ). 
         [0036]    According to a ninth preferred technology based on the construction method for pouring the concrete slab of the seventh preferred technology, there is threaded connection between said tension connection bolt ( 111 ), said external tension bolt ( 161 ) and said external tension sleeve ( 171 ), there is threaded connection between said tension connection bolt ( 111 ), said internal tension bolt ( 162 ) and said internal tension sleeve ( 172 ), and both of the two longitudinal cold bend thin wall steel profiles included in each longitudinal cold bend thin wall steel profile keel are C shaped steel profiles. 
         [0037]    Another preferred technology is a tenth preferred technology based on the construction method for pouring the concrete slab of the eighth preferred technology, wherein: when installing the external concrete form and the internal concrete form for fixed connection with the frame of thin wall steel profiles, using the external tension sleeve, internal tension sleeve, tension connection bolt, external tension bolt and internal tension bolt to form a cavity with equal width along the wall extension direction between the external concrete form and the internal concrete form, and using modular concrete forms to make said external concrete form and said internal concrete form. 
         [0038]    The following is an eleventh preferred technology based on the construction method for pouring the concrete slab of the second basic technology and the first, second and fourth preferred technologies based thereon. According to said preferred technology, the concrete slab structural member is a concrete floor slab structural member or roof slab structural member. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0039]      FIG. 1  illustrates the cross-sectional structure of a preferred embodiment of the concrete slab structural member according to the present invention; 
           [0040]      FIG. 2  illustrates the 3-D exploded structure of said preferred embodiment of the concrete slab structural member according to the present invention; 
           [0041]      FIG. 3  illustrates the 3-D structure of said preferred embodiment of the concrete slab structural member according to the present invention, and said figure illustratively shows the structure from the inside of the structural member; 
           [0042]      FIG. 4  illustrates the 3-D structure of said preferred embodiment of the concrete slab structural member according to the present invention, and said figure illustratively shows the structure from the outside of the structural member. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0043]    In the following description, identical parts have the same names and use the same legends. Corresponding parts have the corresponding names and use the corresponding legends. 
         [0044]    Preferred embodiments of the concrete slab structural member according to the present invention 
         [0045]    Refer to  FIGS. 1-4  below. These figures illustratively show a concrete slab structural member according to a preferred embodiment of the present invention. In these figures, the wall slab structural member in the preferred embodiment of said concrete slab structural member is illustrated in detail. At the same time, the floor slab or roof slab structural member is also illustrated appropriately. It should be understood that those skilled in the art can understand after reading the Description that the structure of the floor slab or roof slab structural member is very similar to that of the wall slab, which only omits the concrete form at one side of the frame of cold bend thin wall steel profiles relative to the wall slab, namely, the concrete form is not needed for the top side of the frame of cold bend thin wall steel profiles, while for the concrete form at another side of the frame of cold bend thin wall steel profiles, namely the concrete form at the bottom side (or external side) of the frame of cold bend thin wall steel profiles, concrete form vertical support may be provided as needed. 
         [0046]    The concrete wall slab structural member shown in  FIGS. 1-4  is in a construction site state. Said wall slab structural member comprises a frame of cold bend thin wall steel profiles as reinforcing bars, concrete forms and concrete form keels. To clearly illustrate the structure, the concrete that wraps said frame of cold bend thin wall steel profiles is not shown (or it could be understood as a state in which concrete is not poured). 
         [0047]    As shown in the figures, the frame of cold bend thin wall steel profiles comprises a plurality of longitudinal cold bend thin wall steel profile keels  5  that are spaced apart along the lateral extension direction (i.e. the direction perpendicular to the paper in  FIG. 1 ) of the main surface (i.e. the surface running through the concrete wall slab and perpendicular to the paper in  FIG. 1  and perpendicular to the top surface of the starting platform  113  in  FIG. 1 ) of the concrete wall slab structural member and placed in parallel to one another. Each longitudinal cold bend thin wall steel profile keel comprises two longitudinal cold bend thin wall steel profiles  51 ,  52 . The main surface of the vertical cold bend thin wall steel profile  51  or  52  (i.e. the surface running through the center of said vertical cold bend thin wall steel profile  51  or  52  and perpendicular to the paper in  FIG. 1  and perpendicular to the top surface of the starting platform  113  in  FIG. 1 ) is parallel to the main surface of the concrete wall slab structural member. The two longitudinal cold bend thin wall steel profiles  51 ,  52  are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete wall slab structural member (i.e. the direction parallel to the paper in  FIG. 1 , and the direction of the oblique axis shown in  FIG. 2 ), so that a space  200  for the concrete to flow through when it is poured is left between the two longitudinal cold bend thin wall steel profiles. When the concrete wall slab is poured and formed, the space left between the two longitudinal cold bend thin wall steel profiles is filled with concrete. 
         [0048]    At positions spaced apart along the longitudinal direction of the cold bend thin wall steel profiles, the top and bottom two positions in  FIG. 2 , the two longitudinal cold bend thin wall steel profiles are, for example, connected through connection steel plates  61 ,  62  via welding or bolt connection so as to fixedly connect the two vertical cold bend thin wall steel profiles. 
         [0049]    Each of the vertical cold bend thin wall steel profiles  51 ,  52  has a plurality of through holes  191 ,  192  on the rolling keel edge distributed along the lengthwise direction thereon for concrete to flow through when it is poured, and the connection steel plates  61 ,  62  have holes  193 ,  194  on the rolling edge for concrete to flow through when it is poured. The functions of the holes on the rolling edge include a. to facilitate the flowing of concrete and improve the concrete pouring efficiency, and b. to improve the rigidity, strength and stability of steel profile parts. 
         [0050]    As shown in  FIGS. 1 ,  3  and  4 , a plurality of vertical cold bend thin wall steel profile keels are connected with a plurality of lateral connection cold bend thin wall steel profile keels distributed along the longitudinal direction of the vertical cold bend thin wall steel profile keels (e.g. through self-tapping screws  118  or screws), and connected with diagonal support cold bend thin wall steel profile keels (e.g. through self-tapping screws  118  or screws), thereby forming a stable overall rigid structure. Each lateral connection cold bend thin wall steel profile keel comprises lateral cold bend thin wall steel profiles  81 ,  82 . Each diagonal support cold bend thin wall steel profile keel comprises diagonal cold bend thin wall steel profiles  31 ,  32 . 
         [0051]    As shown in  FIG. 1 , the concrete wall slab structural member comprises a starting platform  113  disposed at the bottom as the base. A starting sleeve  4  is fixed on the starting platform  113 , and the starting slab  112  of the starting sleeve  4  is fixed on the starting platform  113  by means of an expansion bolt  91 . The starting sleeve  4  has starting vertical cold bend thin wall steel profile keels  41 ,  42  that project upwardly. Vertical cold bend thin wall steel profiles  51 ,  52  fit over said starting vertical cold bend thin wall steel profile keels  41 ,  42  and are fixedly connected therewith (e.g. by means of bolts or welding). 
         [0052]    As shown in  FIGS. 1 ,  3  and  4 , the concrete wall slab structural member further comprises an external concrete form  131  and an internal concrete form  132  when in the construction site. The external concrete form  131  is disposed at one side of said frame of cold bend thin wall steel profiles, and the internal concrete form  132  is disposed at another side of said frame of cold bend thin wall steel profiles. Of course, it should be understood that when the concrete is poured and formed, if regular detachable concrete forms are used, the concrete forms will be detached and the ultimately hardened and formed wall slab does not have concrete forms; if permanent concrete forms are used, the permanent concrete forms will become a part of the ultimately formed wall slab. 
         [0053]    As clearly shown in  FIGS. 1 and 2 , the holes  191 ,  192  on the rolling keel edge of the two vertical cold bend thin wall steel profiles are opposite each other, and the running direction of said holes on the rolling keel edge is perpendicular to the main surface of said concrete slab structural member. The tension connection bolt  111  runs through some (determined according to the amount of tension connection points) of the holes  191 ,  192  on the rolling keel edge. The external tension sleeve  171  is disposed between said external concrete form  131  and the vertical cold bend thin wall steel profile  51  located at the external side. The internal tension sleeve  172  is disposed between said internal concrete form  132  and the vertical cold bend thin wall steel profile  52  located at the internal side. The two tension sleeves  171  and  172  are connected through threads onto two ends of the tension connection bolt  111 . An external vertical concrete form keel  121  and an external lateral concrete form keel  141  are disposed between said external tension bolt  161  and said external concrete form  131  for providing support to the external concrete form, and an internal vertical concrete form keel  122  and an internal lateral concrete form keel  142  are disposed between said internal tension bolt  162  and said internal concrete form  132  for providing support to the internal concrete form. The external tension bolt  161  runs through an external gasket  151 , the external lateral concrete form keel  141 , the external vertical concrete form keel  121  and the external concrete form  131  sequentially to connect with said external tension sleeve  171  through threads so as to fixedly connect the external concrete form with the vertical cold bend thin wall steel profile keel and such that it is supported sufficiently and becomes a stable structure. The internal tension bolt  162  runs through an internal gasket  152 , the internal lateral concrete form keel  142 , the internal vertical concrete form keel  122  and the internal concrete form  132  sequentially to connect with said internal tension sleeve  172  through threads so as to fixedly connect the internal concrete form with the vertical cold bend thin wall steel profile keel and such that it is supported sufficiently and becomes a stable structure. 
         [0054]    As shown in  FIGS. 1 and 2 , both of the two longitudinal cold bend thin wall steel profiles included in each longitudinal cold bend thin wall steel profile keel are C shaped steel profiles, and are placed in such a way that the grooves of the two steel profiles are opposite each other. It should be understood that both the external concrete form and the internal concrete form could be modular concrete forms. 
         [0055]    A space is left between the external concrete form, the internal concrete form and the vertical cold bend thin wall steel profiles  51 ,  52 . When it is poured, the concrete is between the external concrete form and the internal concrete form, and covers said frame of cold bend thin wall steel profiles. 
         [0056]    Preferred embodiments that use various construction methods of the present invention will be described below. 
         [0057]    Technologies that use the frame of cold bend thin wall steel profiles of the present invention to take the place of steel bars—construction technologies of preferred embodiments of the concrete slab structural member of the present invention 
         [0058]    The construction method of preferred embodiments of the present invention will be described below with reference to  FIGS. 1-4 . 
         [0059]    As shown in the figures, the construction method of the poured concrete wall slab of said preferred embodiments of the present invention comprises the following steps: 
         [0060]    A step of installing a frame of thin wall steel profiles, wherein a plurality of vertical cold bend thin wall steel profile keels  5  are spaced apart along the lateral extension direction of the main surface of the concrete wall slab and placed in parallel to one another, each of the vertical cold bend thin wall steel profile keels  5  comprises two vertical cold bend thin wall steel profiles  51 ,  52 , the main surfaces of said vertical cold bend thin wall steel profiles are set to be parallel to the main surface of the concrete wall slab such that the two vertical cold bend thin wall steel profiles are spaced apart and opposite each other along a direction perpendicular to the main surface of the concrete wall slab, and that a space  200  for the concrete to flow through when it is poured is left between the two vertical cold bend thin wall steel profiles; 
         [0061]    A step of installing the external concrete form  131 , wherein the external concrete form is installed on one side of said frame of cold bend thin wall steel profiles and is fixedly connected with the frame of thin wall steel profiles; 
         [0062]    A step of installing the internal concrete form  132 , wherein the internal concrete form is installed on another side of said frame of cold bend thin wall steel profiles and is fixedly connected with the frame of thin wall steel profiles; 
         [0063]    A step of pouring concrete, wherein concrete is poured between the external concrete form and the internal concrete form such that said concrete flows through said space  200  smoothly. 
         [0064]    The step of installing the frame of thin wall steel profiles comprises: preparing a starting platform  113  at the bottom, fixing a starting sleeve  4  that comprises a starting slab  112  and starting vertical cold bend thin wall steel profile keels  41 ,  42  on said starting platform, and fixedly connecting said vertical cold bend thin wall steel profiles  51 ,  52  with said starting vertical cold bend thin wall steel profile keels  41 ,  42 ; a step of connecting said two vertical cold bend thin wall steel profiles, the holes  191 ,  192  on the rolling keel edge of the two vertical cold bend thin wall steel profiles are made to be opposite each other such that the running direction of said holes on the rolling keel edge is perpendicular to the main surface of said concrete wall slab, and connection steel plates  61 ,  62  are used to fixedly connect the two vertical cold bend thin wall steel profiles at positions spaced apart along the vertical direction of the cold bend thin wall steel profiles; using a lateral connection cold bend thin wall steel profile keel that comprises lateral cold bend thin wall steel profiles  81 ,  82  to connect a plurality of vertical cold bend thin wall steel profile keels placed in parallel, and connecting a diagonal support cold bend thin wall steel profile keel that comprises diagonal cold bend thin wall steel profiles  31 ,  32  with the vertical cold bend thin wall steel profile keel to form a stable overall rigid structure; running the tension connection bolt  111  through some of the holes  191 ,  192  on the rolling keel edge such that two ends of said tension connection bolt  111  run through said holes on the rolling keel edge, respectively, to be connected with said external tension sleeve and said internal tension sleeve via threads. 
         [0065]    When said external concrete form is installed, a space is left between said external concrete form and the vertical cold bend thin wall steel profile  51  located at the external side, when said internal concrete form is installed, a space is left between said internal concrete form and the vertical cold bend thin wall steel profile  52  located at the internal side, and when concrete is poured, said concrete fills up the space between said external concrete form and said internal concrete form and covers said frame of cold bend thin wall steel profiles. 
         [0066]    Disposing an external vertical concrete form keel  121  and an external lateral concrete form keel  141  between said external tension bolt  161  and said external concrete form  131  for providing support to the external concrete form, and disposing an internal vertical concrete form keel  122  and an internal lateral concrete form keel  142  between said internal tension bolt  162  and said internal concrete form  132  for providing support to the internal concrete form. 
         [0067]    When running said external tension bolt  161  through said external concrete form  131  to connect with said external tension sleeve  171 , running said external tension bolt through an external gasket  151 , the external lateral concrete form keel, the external vertical concrete form keel and the external concrete form sequentially to connect with said external tension sleeve  171  via threads so as to fixedly connect said external concrete form with said vertical cold bend thin wall steel profile keel. 
         [0068]    When running said internal tension bolt  162  through said internal concrete form  132  to connect with said internal tension sleeve  171 , running said internal tension bolt through an internal gasket  152 , the internal lateral concrete form keel, the internal vertical concrete form keel and the internal concrete form sequentially to connect with said internal tension sleeve  172  via threads so as to fixedly connect said internal concrete form with said vertical cold bend thin wall steel profile keel. 
         [0069]    When installing the external concrete form and the internal concrete form for fixed connection with the frame of thin wall steel profiles, using the external tension sleeve, internal tension sleeve, tension connection bolt, external tension bolt and internal tension bolt to form a cavity with equal width along the wall extension direction between the external concrete form and the internal concrete form, and using modular concrete forms to make said external concrete form and said internal concrete form. 
         [0070]    In the step of pouring concrete, the concrete flows through the space  200 , and flows through the holes  191 ,  192  on the rolling keel edge and the holes on the rolling keel edge of said connection steel plates. The flowing obstruction is very low, the flowing is very smooth, the pouring efficiency is relatively high, work time and energy consumption are saved, and the compactness and homogeneity of the formed concrete are better. 
         [0071]    As shown in  FIGS. 1 and 2 , moreover, along the length (or height) direction of the longitudinal cold bend thin wall steel profile keel, segments of the longitudinal cold bend thin wall steel profile keel may be fixedly connected through longitudinal connection thin wall steel profiles  71 ,  72  included in the longitudinal steel profile connection keel  7 , such that the longitudinal (or vertical) length (or height) of the steel profile keel may reach the length (or height) desired in engineering. 
         [0072]    As shown in  FIGS. 1 ,  3  and  4 , moreover, those skilled in the art may understand that the construction method for the structure and slab of frame of thin wall steel profiles according to the present invention may similarly be used in the pouring of floor slabs. It is just that concrete forms are not disposed on the top side of the frame when the floor slab is poured. Instead, regular detachable concrete forms are fixedly connected to the bottom side (external side) of the frame of thin wall steel profiles, and then concrete is poured from above. When the frame of thin wall steel profiles according to the present invention is used on building roof slabs, it can similarly achieve the effect of reducing or eliminating the cold bridge. 
         [0073]    With respect to the above specific technologies that use the frame of thin wall steel profiles of the present invention to take the place of steel bars, those skilled in the art may employ specific flows according to practical needs of a project to make various changes and adjustments. A flow that can be used in specific project practices according to the present application is as follows: 
         [0074]    1. Design the structure layout diagram of the frame of thin wall steel profiles with a computer aided design program or through manual design, which accurately labels the position of each thin wall steel profile parts; 
         [0075]    2. Design the layout diagram of the concrete forms with a computer aided design program or through manual design, which accurately labels the positions of standard concrete forms and non-standard concrete forms, and determines hole positions of the tension bolts; 
         [0076]    3. When the foundation construction is completed, construct a starting platform or use the foundation as the starting platform. It is required that the sizes be accurate and the entire circumference be at the same elevation. Begin to continuously fix starting sleeves according to the design requirements; 
         [0077]    4. Perform the construction of vertical keels, fit the vertical keels into the starting keels and complete bolt connection, and then connect the lateral steel profile keels onto the vertical keels via bolts such that it becomes a stable structure; 
         [0078]    5. Fix and install the internal concrete forms and the external concrete forms; 
         [0079]    6. Install modular concrete forms layer by layer, and the modular internal concrete forms and the external concrete forms form a reliable cavity with equal width through tension connection bolts, tension sleeves and tension bolts; 
         [0080]    7. Repeat Steps 5 and 6 to the position of floor slabs, the modular internal concrete forms intersect with the bottom concrete forms of the floor slab (optionally detachable modular concrete forms may be used), and construct a reliable support, continue upwardly to install one to two pieces of the modular external concrete forms and connect with the raised vertical keels; 
         [0081]    8. Conduct the construction of the frame of thin wall steel profiles and concrete forms (including the external concrete forms and internal concrete forms) alternately. Typically, the vertical keels are 90 cm above the floor surface and function as a temporary fence. When the installation of floor thin wall steel profiles is completed, pour concrete for the lower level walls and the floor. Make sure to pour in rounds with each pouring at about 0.5 m high; 
         [0082]    9. Repeat Steps 5˜8 to the roof. 
         [0083]    In the present application documents, all “including . . . ” mean both “including . . . ” and “consisting of . . . ”. 
         [0084]    The description of various structural members and methods in the Description of the present application focuses on the description of aspects related to the present invention. According to actual requirements of engineering design and construction, those skilled in the art may supplement, amend or add or delete the steps included in all methods disclosed in the Description. Without departing from the principle of the present invention, these supplemented, amended or added or deleted methods will not depart from the scope of the present invention. For example, the construction method for pouring concrete slabs on the construction site is described in the preferred embodiments. However, those skilled in the art can understand that the construction method of the present invention can be similarly used in building material factories so as to pre-fabricate concrete slabs (including wall slabs, floor slabs and roof slabs). 
       LIST OF PARTS AND FIGURE LEGENDS 
       [0000]    
       
         Starting platform  113   
         Expansion bolt  91   
         Starting sleeve  4   
         Starting slab  112   
         Starting vertical cold bend thin wall steel profile keel  41 ,  42   
         Longitudinal cold bend thin wall steel profile keel  5 ,  9   
         Longitudinal cold bend thin wall steel profile  51 ,  52 ,  91 ,  92   
         Connection steel plate  61 ,  62   
         Longitudinal steel profile connection keel  7   
         Longitudinal connection thin wall steel profile  71 ,  72   
         Lateral steel keel  8   
         Lateral thin wall steel profile  81 ,  82   
         Horizontal steel keel  9   
         Horizontal thin wall steel profile  91 ,  92   
         Diagonal support cold bend thin wall steel profile keel  31 ,  32   
         Through hole on the rolling keel edge  191 ,  192 ,  193 ,  194   
         Space  200   
         Vertical concrete form keel  121 ,  122   
         Lateral concrete form keel  141 ,  142   
         Concrete form  131 ,  132   
         Tension bolt  161 ,  162   
         Tension connection bolt  111   
         Gasket  151 ,  152   
         Tension sleeve  171 ,  172   
         Self-tapping screw  118   
         Self-tapping bolt  115   
         Support angle iron  116