Large-span thick plate cast-in-place steel plate concrete structure and construction method

Abstract

The invention discloses a large-span thick plate cast-in-place steel plate concrete structure and a construction method. The large-span thick plate cast-in-place steel plate concrete structure comprises a profiled steel plate, a bearing main beam, connection secondary beam H-shaped steel, connection secondary beam channel steel and a supporting table. The profiled steel sheet is mounted above the bearing main beam; two ends of the bearing main beam are mounted on the supporting table; h-shaped steel of the contact secondary beams is mounted on two sides of a middle rib plate of the bearing main beam; the connecting secondary beam channel steel is mounted at rib plates on two sides of the front part and rib plates on two sides of the rear part of the bearing main beam; the supporting tables are arranged on the wall bodies on the two sides of the bearing main beam or the side faces of the wall bodies. A first support embedded part is arranged on the bearing table surface of the supporting table; a second support embedded part is arranged on the side wall body of the supporting table; and after installation is completed, the large-span thick plate cast-in-place steel plate concrete structure is obtained through one-time concrete pouring. According to the structure and the construction method, the influence of erecting and disassembling of the supporting system on the construction period is effectively reduced, one-time overall pouring of the large-span thick plate is achieved, the construction efficiency is improved, and the construction period is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to a large-span thick slab cast-in-situ steel plate concrete structure and a construction method. BACKGROUND

[0002] The profiled steel plate and the concrete are combined as a composite floor, which eliminates the erection of the floor bottom formwork support system, has good structural performance as a bearing structure, and is applied more in composite structures. The composite effect between the profiled steel plate and the concrete mainly relies on the longitudinal shear strength along the stress direction of the plate generated by the bonding effect between the two to realize, which plays the advantages of the steel plate tensile resistance and the concrete compression resistance, and can improve the cross-section stiffness. In engineering practice, the profiled steel plate is mostly used as a permanent formwork, and the profiled steel plate is used as a structural safety reserve.

[0003] The traditional profiled steel plate has a relatively small erection span, so that no intermediate support system is provided, or the support structure is too complex, which is easy to cause the profiled steel plate to be deformed too much or material to be wasted, and the construction is complicated. When the large-span thick slab is constructed, the distance between the main beams is large, if the four sides and the intermediate support system are not used, the strength and stiffness of the profiled steel plate itself cannot bear all the upper concrete load, and in the engineering, the concrete on the profiled steel plate is often poured in two times, and after the first poured concrete reaches the design strength requirement, the remaining second concrete is poured. Taking a 1m thick floor slab as an example, in the past, layer-by-layer pouring is adopted, 300mm of the first layer is poured, and after the 300mm thick concrete strength meets the requirement of the composite beam cross-section strength, the upper 700mm of concrete can be poured. Although this construction scheme is feasible, not only the construction joint is increased in the middle of the floor slab, which causes a large area of the first poured concrete surface to be chiseled and treated, but also the construction process is increased, the construction period is prolonged, and the construction quality guarantee degree is obviously reduced. SUMMARY

[0004] The purpose of the present application is to provide a large-span thick slab cast-in-situ steel plate concrete structure and a construction method, which realizes one-time pouring of the large-span thick slab, solves the problem of the construction joint generated by the profiled steel plate and the concrete combined composite floor poured in two times, the need for secondary treatment, the increase of the construction process, and the difficulty in guaranteeing the construction quality.

[0005] In order to achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows: The first aspect of the present application provides a large-span thick slab cast-in-situ steel plate concrete structure, which comprises a profiled steel plate, a bearing main beam, a contact secondary beam H-shaped steel, a contact secondary beam channel steel and a support table. The profiled steel plate is installed above the bearing main beam, and the bearing main beam is installed at both ends of the support table. The contact secondary beam H-shaped steel is installed on both sides of the middle rib plate of the load-bearing main beam, and the middle part of each adjacent two load-bearing main beams is connected by the contact secondary beam H-shaped steel; the contact secondary beam channel steel is installed on both sides of the front rib plate and the rear rib plate of the load-bearing main beam, and the front part and the rear part of each adjacent two load-bearing main beams are connected by the contact secondary beam channel steel. The support table is arranged on the wall on both sides of the load-bearing main beam or the side of the wall, and is used for bearing the end part of the load-bearing main beam; the first support embedded part is arranged on the bearing table surface of the support table, and is used for positioning and supporting the load-bearing main beam; the second support embedded part is arranged on the side wall of the support table, and is used for positioning and connecting the end surface of the load-bearing main beam. After the profiled steel sheet, the load-bearing main beam, the contact secondary beam H-shaped steel and the contact secondary beam channel steel are installed, the large-span thick plate cast-in-situ steel plate concrete structure is obtained by one-time pouring of concrete.

[0006] In order to optimize the above technical scheme, the specific measures / limitations adopted also include: The two ends of the contact secondary beam H-shaped steel and the contact secondary beam channel steel are respectively provided with a third support embedded part, a contact secondary beam end connecting angle steel is welded on the third support embedded part, and the end part of the contact secondary beam H-shaped steel and the end part of the contact secondary beam channel steel are connected and fixed by the contact secondary beam end connecting angle steel. A support bottom reinforcing angle steel is welded on the bottom of the third support embedded part, and the bottom of the contact secondary beam H-shaped steel and the contact secondary beam channel steel is supported on the support bottom reinforcing angle steel. A load-bearing angle steel installation embedded part is pre-embedded between every two third support embedded parts, a load-bearing angle steel is fixedly installed on the side surface of the load-bearing angle steel installation embedded part, the load-bearing angle steel is arranged between adjacent two contact secondary beam channel steels and between the load-bearing secondary beam H-shaped steel and the contact secondary beam channel steel, the top part of the load-bearing angle steel is flush with the top part of the load-bearing main beam, and the two ends of the load-bearing angle steel are respectively tightly abutted against the load-bearing secondary beam H-shaped steel or the contact secondary beam channel steel.

[0007] Further, a load-bearing angle steel installation embedded part is pre-embedded between every two second support embedded parts, a load-bearing angle steel is fixedly installed on the side surface of the load-bearing angle steel installation embedded part, the load-bearing angle steel is arranged between adjacent two load-bearing main beams, the top part of the load-bearing angle steel is flush with the top part of the load-bearing main beam, and the two ends of the load-bearing angle steel are respectively tightly abutted against the adjacent two load-bearing main beams; a load-bearing main beam end connecting angle steel is installed on the second support embedded part, and the load-bearing main beam end connecting angle steel is used for connecting the end part of the load-bearing main beam.

[0008] Preferably, the end part of the profiled steel sheet is connected with the load-bearing angle steel by penetration spot welding, and the middle part of the profiled steel sheet is connected with the load-bearing main beam by a shear pin.

[0009] Further, mounting holes are formed in the lower flanges at the two ends of the load-bearing main beam; the first support embedded parts are respectively provided with bolts, the bolts protrude from the surface of the first support embedded parts, and are matched with the mounting holes at the two ends of the load-bearing main beam.

[0010] Further, the load-bearing main beam is additionally provided with stiffened rib steel plates and is perforated, the connecting secondary beam channel steels are matched and installed in the perforations of the stiffened rib steel plates through bolts; the webs of the load-bearing main beam and the connecting secondary beam H-shaped steels at the connecting parts are all provided with perforations, and the webs of the load-bearing main beam and the connecting secondary beam H-shaped steels are fixedly connected through the connecting angle steels.

[0011] Further, the support platform is a protruding support platform or an embedded support platform. When the wall thickness at the two ends of the load-bearing main beam is thin, the protruding support platform protruding from the wall surface is adopted; the protruding support platform is erected on the corbel support frame installed on the side surface of the wall; the corbel support frame is supported through the suspension frame, and the I-shaped beam is installed at the bottom of the corbel support frame. When the wall thickness at the two ends of the load-bearing main beam is thick, the embedded support platform arranged on the wall is adopted; the embedded support platform is the platform left after part of the wall is cut off.

[0012] Further, the wall where the support platform is located is divided into an upper wall and a lower wall, the lower wall is a wall pre-cast, and a channel steel for embedded part reinforcement is pre-installed in the lower wall, an inclined threaded steel for embedded part reinforcement is welded on the channel steel for embedded part reinforcement, and an adjusting bolt for connecting the first support embedded part is welded on the threaded steel for embedded part reinforcement; the upper wall is cast after the support platform is installed.

[0013] The second aspect of the present application provides a construction method of a large-span thick plate cast-in-situ steel plate concrete structure, comprising the following steps: S1: lower wall construction, during the lower wall construction, a channel steel for embedded part reinforcement is pre-installed in the middle of the wall; S2: after the lower wall construction is completed, a first support embedded part is pre-buried on the bearing platform of the support platform, a second support embedded part and a embedded part for load-bearing angle steel installation are pre-buried on the side wall of the support platform, a side form is installed, the support platform and the upper wall are cast as a whole, and a third support embedded part is pre-buried on the side wall at the two ends of the connecting secondary beam H-shaped steel and the connecting secondary beam channel steel; S3: a load-bearing main beam end connecting angle steel is welded on the second support embedded part, a connecting secondary beam end connecting angle steel is welded on the third support embedded part, and a support bottom reinforcement angle steel is welded at the bottom of the third support embedded part; S4: hoist the load-bearing main girder, the bottom of the load-bearing main girder is connected and fixed with the first support embedded part, and the end surface of the load-bearing main girder is fixedly connected with the load-bearing main girder end connecting angle steel welded on the two support embedded parts through pre-holes in the end of the web; S5: the middle part of each two adjacent load-bearing main girders is connected with a contact secondary beam H-shaped steel; the front part and the rear part of each two adjacent load-bearing main girders are connected with a contact secondary beam channel steel, and the contact secondary beam channel steel is installed at the rib plate positions on the two sides of the front part and the rear part of the load-bearing main girder; the end of the contact secondary beam H-shaped steel and the contact secondary beam channel steel is arranged on the support bottom reinforcing angle steel welded below the vertical support embedded part, and is fixedly connected with the contact secondary beam end connecting angle steel welded on the vertical support embedded part through pre-holes in the end of the web of the contact secondary beam H-shaped steel and the contact secondary beam channel steel respectively; S6: the load-bearing angle steel installed on the embedded part between each two second support embedded parts and each two third support embedded parts is welded with a load-bearing angle steel, and the top elevation of the load-bearing angle steel is flush with the top elevation of the load-bearing main girder; S7: a profiled steel plate is installed on the load-bearing main girder and the load-bearing angle steel, the end of the profiled steel plate is connected with the load-bearing angle steel corresponding to the third support embedded part by means of fusion penetration spot welding, and the middle part of the profiled steel plate is connected with the load-bearing main girder; an edge sealing steel plate for preventing concrete leakage is installed at the opening of the end of the profiled steel plate, and the edge sealing steel plate is arranged at a position 20-30mm away from the wall side in the opening direction of the profiled steel plate; S8: the floor steel bars are bound, the floor side formwork is supported, and the floor concrete is poured on the profiled steel plate, the load-bearing main girder, the contact secondary beam H-shaped steel and the contact secondary beam channel steel.

[0014] Compared with the prior art, the beneficial effects of the present application are: The large-span thick plate cast-in-place steel plate concrete structure provided by the present application adopts an intermediate main and secondary steel beam support system and four surrounding support angle steels, the main and secondary steel beams are tightly connected through detachable connecting pieces, the profiled steel plate is fixed on the load-bearing main girder through shear nails, the bracket of the load-bearing main girder is reserved in the wall, the steel beam connecting reinforcing embedded parts are reserved in advance on the top of the bracket and the side of the wall, and the main and secondary steel beams are fixed on the embedded parts to form an integral force system, thereby improving the overall ultimate bearing capacity, meeting the bearing capacity requirement of the large-span thick plate cast-in-place roof plate and load-bearing floor structure, realizing one-time pouring of the large-span thick plate, and the whole system has a clear force transmission path, a relatively simple overall structure, convenient installation, low cost, high bearing capacity, improved construction efficiency and shortened construction period. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 : the structural schematic diagram of the large-span thick plate cast-in-place steel plate concrete structure of the present application.

[0016] Figure 2 : the plan view of the large-span thick plate cast-in-place steel plate concrete structure of the present application.

[0017] Figure 3 Figure 1 is a schematic view of the A-A cross-sectional structure of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0018] Figure 4 Figure 2 is a schematic view of the B-B cross-sectional structure of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0019] Figure 5 Figure 3 is a schematic view of the C-C cross-sectional structure of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0020] Figure 6 Figure 4 is a side view of the horizontal and lateral installation connection of the end of the load-bearing main beam of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0021] Figure 7 Figure 5 is a top view of the horizontal and lateral installation connection of the end of the load-bearing main beam of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0022] Figure 8 Figure 6 is a schematic view of the connection of the load-bearing main beam and the contact secondary beam H-shaped steel of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0023] Figure 9 Figure 7 is a schematic view of the connection of the load-bearing main beam and the contact secondary beam channel steel of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0024] Figure 10 Figure 8 is a schematic view of the end connection of the profiled steel plate in the vertical direction of the load-bearing main beam of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0025] Figure 11 Figure 9 is a schematic view of the end connection of the profiled steel plate in the parallel direction of the load-bearing main beam of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0026] Figure 12 Figure 10 is a schematic view of the first support embedded structure of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0027] Figure 13 Figure 11 is a schematic view of the second support embedded structure of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0028] Figure 14 Figure 12 is a schematic view of the embedded structure for the installation of the load-bearing angle steel of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0029] Figure 15 Figure 13 is a schematic view of the protruding support platform structure of the large-span thick plate cast-in-situ steel plate concrete structure of the present application.

[0030] Figure 16The embedded support platform structure diagram of the large-span thick plate cast-in-situ steel plate concrete structure.

[0031] Figure 17 The first support embedded part reinforcing structure diagram of the large-span thick plate cast-in-situ steel plate concrete structure. In the figure: 1-first support embedded part, 101-first support embedded part steel plate, 102-first support embedded part anchor bolt, 103-first support embedded part anchoring plate, 104-bolt for fixing load-bearing main beam, 2-second support embedded part, 201-second support embedded part steel plate, 202-second support embedded part anchor bolt, 203-second support embedded part anchoring plate, 3-pad plate, 4-embedded part for installing load-bearing angle steel, 401-embedded part steel plate for installing load-bearing angle steel, 402-embedded part anchor bolt for installing load-bearing angle steel, 403-anchoring plate for installing load-bearing angle steel, 5-nut, 6-load-bearing main beam, 7-load-bearing angle steel, 8-end connecting angle steel of load-bearing main beam, 9-stiffening rib steel plate, 10-contacting secondary beam H-shaped steel, 11-connecting bolt, 12-end connecting angle steel of contacting secondary beam, 13-connecting angle steel, 14-shear stud, 15-profiled steel plate, 16-contacting secondary beam channel steel, 17-support bottom reinforcing angle steel, 18-edge sealing steel plate, 19-embedded part reinforcing channel steel, 20-embedded part reinforcing threaded steel, 21-adjusting bolt, 22-hanging frame, 23-corbel support frame, 24-I-beam, 25-wall side form, 26-supporting platform, 27-third support embedded part. DETAILED DESCRIPTION

[0032] The above content of the present application is further explained in detail in the form of specific embodiments, but it should not be understood that the scope of the above subject matter of the present application is limited to the following embodiments, and any technology realized based on the above content of the present application belongs to the scope of the present application.

[0033] The present application provides a large-span thick plate cast-in-situ steel plate concrete structure, as shown in Figure 1 and Figure 2 , comprising a profiled steel plate 15, a load-bearing main beam 6, a contacting secondary beam H-shaped steel 10, a contacting secondary beam channel steel 16 and a supporting platform 26.

[0034] The profiled steel plate 15 is installed above the load-bearing main beam 6; the load-bearing main beam 6 is installed at both ends of the supporting platform 26.

[0035] As shown in Figure 3 , Figure 4 and Figure 5 , the contacting secondary beam H-shaped steel 10 is installed at both sides of the middle rib plate of the load-bearing main beam 6, and each adjacent two load-bearing main beams 6 are connected by the contacting secondary beam H-shaped steel 10; the contacting secondary beam channel steel 16 is installed at the rib plate positions of the front and rear of the load-bearing main beam 6, and each adjacent two load-bearing main beams 6 are connected by the contacting secondary beam channel steel 16.

[0036] Supporting platform 26 is arranged on the wall on both sides of load-bearing main girder 6 or the side of the wall, for carrying the end of load-bearing main girder 6; the carrying platform of supporting platform 26 is provided with first support embedded part 1, as shown in Figure 6 and Figure 7 , for positioning and supporting load-bearing main girder 6; the side wall of supporting platform 26 is provided with second support embedded part 2, for positioning and connecting the end face of load-bearing main girder 6.

[0037] As shown in Figure 12 and Figure 17 , first support embedded part 1 includes first support embedded part steel plate 101, first support embedded part anchor 102, first support anchoring plate 103, and bolt 104 for fixing load-bearing main girder; as shown in Figure 13 , second support embedded part 2 includes second support embedded part steel plate 201, second support embedded part anchor 202, and second support anchoring plate 203.

[0038] The two ends of contact secondary beam H-shaped steel 10 and contact secondary beam channel steel 16 are respectively provided with third support embedded part 27, and contact secondary beam end connecting angle steel 12 is welded on third support embedded part 27; the end of contact secondary beam H-shaped steel 10 and the end of contact secondary beam channel steel 16 are both connected and fixed through contact secondary beam end connecting angle steel 12.

[0039] The bottom of third support embedded part 27 is welded with support bottom reinforcing angle steel 17, and the bottom of contact secondary beam H-shaped steel 10 and contact secondary beam channel steel 16 is supported on support bottom reinforcing angle steel 17.

[0040] Buried part 4 for load-bearing angle steel installation is pre-buried between every two third support embedded parts 27, and load-bearing angle steel 7 is installed and fixed on the side surface of buried part 4 for load-bearing angle steel installation, and load-bearing angle steel 7 is arranged between adjacent two contact secondary beam channel steels 16 and between load-bearing secondary beam H-shaped steel 10 and contact secondary beam channel steel 16; the top elevation of load-bearing angle steel 7 is flush with the top elevation of load-bearing main girder 6, which provides a flat support surface for profiled steel sheet 15, and the two ends of load-bearing angle steel 7 are respectively tightly pressed against load-bearing secondary beam H-shaped steel 10 or contact secondary beam channel steel 16, which eliminates the installation gap and ensures the effective transmission of load.

[0041] As shown in Figure 14 , buried part 4 for load-bearing angle steel installation includes buried part steel plate 401 for load-bearing angle steel installation, buried part anchor bolt 402 for load-bearing angle steel installation, and anchoring plate 403 for load-bearing angle steel installation.

[0042] As shown in Figure 11As shown, embedded angle steel mounting embedded parts 4 are embedded between every two second support embedded parts 2, and the side surfaces of the embedded angle steel mounting embedded parts 4 are also mounted and fixed with bearing angle steels 7, the bearing angle steels 7 are arranged between the adjacent two bearing main girders 6, the top elevations of the bearing angle steels 7 are flush with the top elevations of the bearing main girders 6, and the two ends of the bearing angle steels 7 are respectively tightly pressed against the adjacent two bearing main girders 6; the second support embedded parts 2 are mounted with bearing main girder end connecting angle steels 8, which are used to connect the ends of the bearing main girders 6.

[0043] The two ends of the bearing main girders 6 are provided with mounting holes in the lower flanges; the first support embedded parts 1 are respectively provided with bolts 104, which extend out of the surfaces of the first support embedded parts 1 and are mounted in the mounting holes of the two ends of the bearing main girders 6 through the cooperation of the backing plates 3 and the nuts 5.

[0044] The ends of the bearing main girders 6 are reinforced through the horizontal first support embedded parts 1 and the vertical second support embedded parts 2, and are more stably fixed on the support platform.

[0045] As shown in Figure 8 and Figure 9 shown, the bearing main girders 6 are additionally provided with stiffened rib steel plates 9 and are provided with holes, and the contact secondary beam channel steels 16 are mounted in the holes of the stiffened rib steel plates 9 through bolt cooperation; the webs of the bearing main girders 6 and the contact secondary beam H steels 10 at the connecting parts are all provided with holes, the webs of the bearing main girders 6 and the contact secondary beam H steels 10 are fixed and connected through the connecting angle steels 13, the local rigidity of the bearing main girders 6 is enhanced, the overall stability of the structure is improved, the formwork system is ensured not to be deformed during the concrete pouring process, in addition, the connection through the bolts is convenient for the later structural modification or expansion.

[0046] The bearing main girders 6 adopt H steels H400-600*800*20*30-40, the material is Q355B, the camber value is 58mm, and the camber value can be finally determined in combination with various factors such as production and construction. The selection of the specifications and the material of the bearing main girders 6 provides good lateral stability, effectively prevents the steel beam from being deformed due to instability under heavy load, and at the same time ensures that the bearing main girders 6 can reliably support the construction load of the large-span concrete slab.

[0047] The end of the profiled steel plate 15 is connected with the bearing angle steel 7 by penetration welding, and the middle part of the profiled steel plate 15 is connected with the bearing main beam 6 by shear nails 14. The material of the profiled steel plate 15 is Q355B, the design strength is 300 MPa, the wave height of the profiled steel plate 15 is 76 mm, the wave distance is 305 mm, the plate width is 915 mm, the thickness is 1.5 mm, the distance S between the shear nail and the wing edge of the bearing main beam 6 is 80 mm, the distance along the length direction of the bearing main beam 6 is 305 mm, the end of the profiled steel plate 15 is connected with the bearing angle steel 7 by welding with a diameter of 16, and the end opening of the profiled steel plate 15 is provided with an edge sealing steel plate 18, which is arranged at a distance of 20-30 mm from the wall body side 20 in the opening direction of the profiled steel plate 15, as shown in Figure 10 , which is used to prevent concrete leakage during pouring.

[0048] As shown in Figure 15 and Figure 16 , the support table 26 is a protruding support platform or an embedded support platform. When the thickness of the wall body at both ends of the bearing main beam 6 is thin, a protruding support table protruding from the wall surface is used. The protruding support table is arranged on the corbel support frame 23 installed on the wall body side. The corbel support frame 23 is supported by the hanging frame 22, and the I-shaped beam 24 is installed at the bottom of the corbel support frame 23. The protruding support table converts the concentrated load of the bearing main beam 6 into distributed load and transmits it to the main structure of the wall body, greatly improving the structural safety and reliability under the condition of thin wall body.

[0049] When the thickness of the wall body at both ends of the bearing main beam 6 is thick, an embedded support table arranged on the wall body is used. The embedded support table is the table surface left after cutting part of the wall body. The embedded support table makes full use of the existing wall material and reduces the use of additional support components, thereby optimizing the material cost under the premise of ensuring the structural safety.

[0050] The wall body where the support table 26 is located is divided into an upper wall body and a lower wall body. The lower wall body is a pre-poured wall body, and a channel steel 19 for embedded reinforcement is installed in the lower wall body in advance. The embedded reinforcement channel steel 19 extends into the lower wall body by a depth of not less than 200 mm. An inclined embedded reinforcement threaded steel 20 is welded on the embedded reinforcement channel steel 19. An adjusting bolt 21 connected with the first support embedded part 1 is welded on the embedded reinforcement threaded steel 20, which is used for the precision of the first support embedded part 1 to meet the installation of the bearing main beam 6. The upper wall body is poured after the installation of the support table 26 is completed.

[0051] After the profiled steel plate 15, the bearing main beam 6, the contact beam H-shaped steel 10 and the contact beam channel steel 16 are installed, the large-span thick plate cast-in-place steel plate concrete structure is obtained by pouring the concrete once. During the pouring of the large-span thick plate concrete, the construction live load is considered to be not more than 4 kN / m 2 .

[0052] The application also provides a construction method of a large-span thick plate cast-in-situ steel plate concrete structure, comprising the following steps: S1: constructing a lower wall body, and installing a channel steel 19 for reinforcing in the middle of the wall body in advance during the construction of the lower wall body; S2: after the construction of the lower wall body is completed, pre-burying a first support seat embedded part 1 on a bearing table surface of a support table 26, pre-burying a second support seat embedded part 2 and a bearing angle steel embedded part 4 on a side wall of the support table 26, installing a side form 25 of the wall body, pouring the support table 26 and an upper wall body into one body, and pre-burying a third support seat embedded part 27 on the side wall of the support table 26 at both ends of the contact secondary beam H-shaped steel 10 and the contact secondary beam channel steel 16; S3: welding a bearing main beam end connecting angle steel 8 on the second support seat embedded part 2, welding a contact secondary beam end connecting angle steel 12 on the third support seat embedded part 27, and welding a support bottom reinforcing angle steel 17 on the bottom of the third support seat embedded part 27; S4: hoisting the bearing main beam 6, and fixing the bottom of the bearing main beam 6 with the first support seat embedded part 1, and fixing the end side of the bearing main beam 6 with the bearing main beam end connecting angle steel 8 welded on the second support seat embedded part 2 through pre-holes in the web end; S5: connecting every two adjacent bearing main beams 6 in the middle with the contact secondary beam H-shaped steel 10, and connecting every two adjacent bearing main beams 6 in the front and the back with the contact secondary beam channel steel 16, and installing the contact secondary beam channel steel 16 at the rib plate positions on both sides of the front and the back of the bearing main beam 6, and placing the ends of the contact secondary beam H-shaped steel 10 and the contact secondary beam channel steel 16 on the support bottom reinforcing angle steel 17 welded under the vertical support seat embedded part 2, and fixing the contact secondary beam H-shaped steel 10 and the contact secondary beam channel steel 16 with the contact secondary beam end connecting angle steel 12 welded on the vertical support seat embedded part 2 through pre-holes in the web ends of the contact secondary beam H-shaped steel 10 and the contact secondary beam channel steel 16; S6: welding a bearing angle steel 7 on the bearing angle steel embedded part 4 between every two second support seat embedded parts 2 and every two third support seat embedded parts 27, and making the top of the bearing angle steel 7 flush with the top of the bearing main beam 6 in elevation; S7: installing profiled steel plates 15 on the bearing main beam 6 and the bearing angle steel 7, and adopting fusion welding to connect the ends of the profiled steel plates 15 with the bearing angle steel 7 corresponding to the third support seat embedded part 27, and connecting the middle part of the profiled steel plates 15 with the bearing main beam 6, and installing edge steel plates 18 for preventing concrete leakage at the openings of the ends of the profiled steel plates 15, and setting the edge steel plates 18 at a distance of 20-30 mm from the wall body side surface 20 in the opening direction of the profiled steel plates 15; S8: binding floor steel bars, supporting floor side forms, and pouring floor concrete on the profiled steel plates 15, the bearing main beam 6, the contact secondary beam H-shaped steel 10 and the contact secondary beam channel steel 16.

[0053] The technical solutions of the application will be further described in detail in combination with specific implementation operations. For lower wall construction, the embedded part 19 for reinforcement is installed in the middle of the wall in advance during the construction of the lower wall, and the suspension frame 22 for support can be pre-buried on both sides of the wall. After the construction of the lower wall is completed, if the wall is relatively thin, a protruding support platform is used to install the suspension frame 22, the I-beam 24 is installed and leveled on the suspension frame 22, and the bracket support frame 23 is erected on the I-beam 24; if the wall is relatively thick, an embedded support platform can be selected. The first support embedded part 1 is pre-buried on the bearing platform of the support platform 26; the embedded part reinforcing steel bar 20 is welded on the reinforcing channel steel 19 to form an embedded part support, and the adjusting bolt 21 is welded on the reinforcing steel bar for adjusting the installation accuracy of the first support embedded part 1; the second support embedded part 2 and the embedded part for installing the bearing angle steel 4 are pre-buried on the side wall of the support platform 26, the side formwork 25 of the wall is installed, and the support platform 26 is integrated with the upper wall during pouring. The third support embedded part 27 is pre-buried on the side wall at the two ends of the contact beam H-shaped steel 10 and the contact beam channel steel 16. The bearing girder end connecting angle steel 8 is welded on the second support embedded part 2; the contact beam end connecting angle steel 12 is welded on the third support embedded part 27; and the support bottom reinforcing angle steel 17 is welded at the bottom of the third support embedded part 27.

[0054] The bearing girder 6 is hoisted, the bottom of the bearing girder 6 is connected and fixed with the first support embedded part 1 through the pre-formed hole in the bottom flange and the bolt 104 of the first support embedded part 1 using the washer 3 and the nut 5, and the end side of the bearing girder 6 is fixed and connected with the bearing girder end connecting angle steel 8 welded on the second support embedded part 2 through the pre-formed hole in the web end. The middle part of every two adjacent bearing girders 6 is connected with the contact beam H-shaped steel 10; the front part and the rear part of every two adjacent bearing girders 6 are connected with the contact beam channel steel 16, which is installed at the rib plate positions on both sides of the front part and the rear part of the bearing girder 6; the end part of the contact beam H-shaped steel 10 and the contact beam channel steel 16 is erected on the support bottom reinforcing angle steel 17 welded below the vertical support embedded part 2, and is fixed and connected with the contact beam end connecting angle steel 12 welded on the vertical support embedded part 2 through the pre-formed holes in the web end of the contact beam H-shaped steel 10 and the contact beam channel steel 16, respectively. The bearing angle steel 7 is welded on the embedded part 4 for installing the bearing angle steel between every two second support embedded parts 2 and every two third support embedded parts 27, and the top of the bearing angle steel 7 is flush with the top of the bearing girder 6 to provide a flat support surface for the installation of the subsequent profiled steel plate 15.

[0055] The profiled steel sheet 15 is installed on the load-bearing main beam 6 and the load-bearing angle steel 7, the end of the profiled steel sheet 15 is connected with the load-bearing angle steel 7 corresponding to the third support embedded part 27 by penetration spot welding, and the middle part of the profiled steel sheet 15 is connected with the load-bearing main beam 6 through the shear pin 14; then the edge sealing steel sheet 18 for preventing concrete leakage is installed at the opening of the end of the profiled steel sheet 15, and the edge sealing steel sheet 18 is arranged at the position of 20-30 mm away from the wall body side surface 20 in the opening direction of the profiled steel sheet 15.

[0056] Finally, the floor steel bars are bound, the floor side mold is supported, the floor concrete is poured on the profiled steel sheet 15, the load-bearing main beam 6, the contact secondary beam H-shaped steel 10 and the contact secondary beam channel steel 16, and the large-span thick plate cast-in-situ steel plate concrete structure is obtained.

[0057] The above is only the preferred embodiment of the present application, and does not limit the present application in any form, any person skilled in the art, without departing from the technical solution of the present application, according to the technical essence of the present application, any simple modification, equivalent replacement and improvement of the above embodiment, etc. still belongs to the protection scope of the technical solution of the present application.

Claims

1. A long-span thick plate cast-in-situ steel plate concrete structure, characterized by, The utility model relates to a large-span thick slab cast-in-situ steel plate concrete structure, which comprises a profiled steel sheet (15), a load-bearing main beam (6), a contact secondary beam H-shaped steel (10), a contact secondary beam channel steel (16) and a support platform (26). The profiled steel sheet (15) is installed above the load-bearing main beam (6); the two ends of the load-bearing main beam (6) are installed on the support platform (26). The contact secondary beam H-shaped steel (10) is installed at the positions on both sides of the middle rib plate of the load-bearing main beam (6); the middle part of each adjacent two load-bearing main beams (6) is connected by the contact secondary beam H-shaped steel (10); the contact secondary beam channel steel (16) is installed at the positions of the rib plates on both sides of the front part and the positions of the rib plates on both sides of the rear part of the load-bearing main beam (6); the front part and the rear part of each adjacent two load-bearing main beams (6) are connected by the contact secondary beam channel steel (16). The support platform (26) is arranged on the wall on the two sides of the load-bearing main beam (6) or the side of the wall and is used for bearing the end part of the load-bearing main beam (6); the first support embedded part (1) is arranged on the bearing platform surface of the support platform (26) and is used for positioning and supporting the load-bearing main beam (6); the second support embedded part (2) is arranged on the side wall of the support platform (26) and is used for positioning and connecting the end surface of the load-bearing main beam (6). After the profiled steel sheet (15), the load-bearing main beam (6), the contact secondary beam H-shaped steel (10) and the contact secondary beam channel steel (16) are installed, the large-span thick slab cast-in-situ steel plate concrete structure is obtained by pouring the concrete once.

2. The large-span thick slab cast-in-situ steel plate concrete structure according to claim 1, characterized in that: The two ends of the contact secondary beam H-shaped steel (10) and the contact secondary beam channel steel (16) are respectively provided with the third support embedded part (27); the third support embedded part (27) is welded with the contact secondary beam end connecting angle steel (12); the end part of the contact secondary beam H-shaped steel (10) and the end part of the contact secondary beam channel steel (16) are connected and fixed by the contact secondary beam end connecting angle steel (12); The bottom of the third support embedded part (27) is welded with the support bottom reinforcing angle steel (17); the bottom of the contact secondary beam H-shaped steel (10) and the contact secondary beam channel steel (16) are supported on the support bottom reinforcing angle steel (17); The load-bearing angle steel installation embedded part (4) is embedded between every two third support embedded parts (27); the side surface of the load-bearing angle steel installation embedded part (4) is installed and fixed with the load-bearing angle steel (7); the load-bearing angle steel (7) is arranged between the adjacent two contact secondary beam channel steels (16) and between the contact secondary beam H-shaped steel (10) and the contact secondary beam channel steel (16); the top part of the load-bearing angle steel (7) is flush with the top part of the load-bearing main beam (6); the two ends of the load-bearing angle steel (7) are in close contact with the contact secondary beam H-shaped steel (10) or the contact secondary beam channel steel (16). ​ 3. The long-span thick plate cast-in-place steel plate concrete structure according to claim 2, characterized in that: Buried piece (2) between every two second support is pre-buried and is installed with the buried angle steel installation buried piece (4) of bearing, the side of the buried angle steel installation buried piece (4) is installed and fixed with the bearing angle steel (7), the bearing angle steel (7) is set between the two adjacent bearing girder (6), the top elevation of the bearing angle steel (7) is flush with the top elevation of the bearing girder (6), and the two ends of the bearing angle steel (7) are respectively tightly pressed to the two adjacent bearing girders (6);The second support embedded part (2) is installed with the end connection angle steel (8) of the bearing girder, and the end connection angle steel (8) of the bearing girder is used to connect the end of the bearing girder (6).

4. The long-span thick plate cast-in-place steel plate concrete structure according to claim 2, characterized in that: The end of the profiled steel sheet (15) is connected with the bearing angle steel (7) by fusion penetration spot welding, and the middle part of the profiled steel sheet (15) is connected with the bearing girder (6) by shear pins (14).

5. The long-span thick plate cast-in-place steel plate concrete structure according to claim 1, characterized in that: The two ends of the bearing girder (6) are provided with mounting holes in the lower flange;The first support embedded part (1) is respectively provided with bolts (104), and the bolts (104) extend out of the surface of the first support embedded part (1) and are matched with the mounting holes installed at the two ends of the bearing girder (6).

6. The long-span thick plate cast-in-place steel plate concrete structure according to claim 1, characterized in that: The bearing girder (6) is additionally provided with stiffened rib steel plates (9) and is provided with openings, the contact secondary beam channel steel (16) is installed in the opening of the stiffened rib steel plate (9) by bolt cooperation, the web of the bearing girder (6) and the contact secondary beam H-shaped steel (10) at the connecting part is provided with an opening, and the web of the bearing girder (6) and the contact secondary beam H-shaped steel (10) is fixedly connected by the connecting angle steel (13).

7. The long-span thick plate cast-in-place steel plate concrete structure according to claim 3, characterized in that: The support platform (26) is a protruding support platform or an embedded support platform; When the wall thickness at the two ends of the bearing girder (6) is thin, a protruding support platform protruding from the wall surface is used, the protruding support platform is erected on the corbel support frame (23) installed on the side surface of the wall, the corbel support frame (23) is supported by the suspension frame (22), and the I-shaped beam (24) is installed at the bottom of the corbel support frame (23); When the wall thickness at the two ends of the bearing girder (6) is thick, an embedded support platform arranged on the wall is used, and the embedded support platform is a platform left after part of the wall is cut off.

8. The long-span thick plate cast-in-place steel plate concrete structure according to claim 7, characterized in that: The wall where the support platform (26) is located is divided into an upper wall and a lower wall, the lower wall is a wall poured in advance, and a channel steel (19) for embedded reinforcement is installed in the lower wall in advance, an inclined threaded steel (20) for embedded reinforcement is welded to the channel steel (19) for embedded reinforcement, an adjusting bolt (21) for connecting the first support embedded part (1) is welded to the threaded steel (20) for embedded reinforcement, and the upper wall is poured after the installation of the support platform (26) is completed.

9. The construction method of a long-span thick plate cast-in-situ steel plate concrete structure according to claim 8, characterized in that, The method comprises the following steps: S1: lower wall construction, during the lower wall construction, the embedded reinforcement channel steel (19) is installed in the wall in advance; S2: After the lower wall construction is completed, embed the first support embedded part (1) on the bearing platform of the support platform (26); embed the second support embedded part (2) and the embedded part (4) for installing the bearing angle steel on the side wall of the support platform (26), install the side form (25) of the wall, and pour the support platform (26) and the upper wall into one body; embed the third support embedded part (27) on the side wall at both ends of the contact beam H-shaped steel (10) and the contact beam channel steel (16); S3: Weld the bearing main beam end connecting angle steel (8) on the second support embedded part (2); weld the contact beam end connecting angle steel (12) on the third support embedded part (27); weld the support bottom reinforcing angle steel (17) at the bottom of the third support embedded part (27); S4: Hoist the bearing main beam (6), and fix the bottom of the bearing main beam (6) with the first support embedded part (1), and fix the end side of the bearing main beam (6) with the bearing main beam end connecting angle steel (8) welded on the second support embedded part (2) through the pre-holed end of the web; S5: The middle part of each adjacent two bearing main beams (6) is connected by the contact beam H-shaped steel (10); the front part and the rear part of each adjacent two bearing main beams (6) are connected by the contact beam channel steel (16), which is installed at the front two side rib plates and the rear two side rib plates of the bearing main beam (6); the end of the contact beam H-shaped steel (10) and the contact beam channel steel (16) is placed on the support bottom reinforcing angle steel (17) welded below the vertical support embedded part (2), and is fixedly connected with the contact beam end connecting angle steel (12) welded on the vertical support embedded part (2) through the pre-holed end of the web of the contact beam H-shaped steel (10) and the contact beam channel steel (16) respectively; S6: Weld the bearing angle steel (7) on the embedded part (4) for installing the bearing angle steel between every two second support embedded parts (2) and every two third support embedded parts (27), and the top elevation of the bearing angle steel (7) is flush with the top elevation of the bearing main beam (6); S7: Install the profiled steel plate (15) on the bearing main beam (6) and the bearing angle steel (7), and adopt fusion spot welding to connect the end of the profiled steel plate (15) with the bearing angle steel (7) corresponding to the third support embedded part (27), and connect the middle part of the profiled steel plate (15) with the bearing main beam (6); S8: Bind the floor steel bars, support the floor side form, and pour the floor concrete on the profiled steel plate (15), the bearing main beam (6), the contact beam H-shaped steel (10) and the contact beam channel steel (16).

10. The construction method of a long-span thick plate cast-in-situ steel plate concrete structure according to claim 9, characterized in that, There are the following steps between steps S7 and S8: Install the edge sealing steel plate (18) for preventing concrete leakage at the opening of the end of the profiled steel plate (15), and the edge sealing steel plate (18) is arranged at a position 20-30 mm away from the wall side in the opening direction of the profiled steel plate (15).

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