A prefabricated assembled steel truss floor deck structure and its construction method

Abstract

This invention discloses a prefabricated assembled steel truss floor slab structure and construction method, comprising a steel plate on which multiple frame components are mounted. Each frame component includes main reinforcing bars, a first auxiliary reinforcing bar, and a second auxiliary reinforcing bar. Both the first and second auxiliary reinforcing bars are fitted into the steel plate. Bent reinforcing bars are welded between the main and second auxiliary reinforcing bars, and also between the first and main reinforcing bars. These bent reinforcing bars are bent into a wavy structure. The main, first, and second auxiliary reinforcing bars are combined into a triangular structure through the bent reinforcing bars. After the top is cast, the connecting mechanism is detachably connected to the steel plate. By unwinding the air tube and releasing the air from the balloon, workers can easily remove the connector from the groove, and the steel plate can also be disassembled. After cleaning the surface concrete, it can be reused, and this recycling reduces construction costs.

Description

Technical Field

[0001] This invention belongs to the technical field of steel truss floor decking, and particularly relates to a prefabricated assembled steel truss floor decking structure and construction method. Background Technology

[0002] A steel truss is a truss constructed by resistance spot welding steel bars as the top chord, bottom chord, and web members. A steel truss floor deck is a composite load-bearing slab formed by resistance spot welding the steel truss to the base slab. Steel truss floor decks enable mechanized production, resulting in uniform steel bar spacing and consistent concrete cover thickness, thus improving the construction quality of the floor slab. Prefabricated steel truss floor decks significantly reduce on-site steel bar tying work, accelerate construction progress, increase construction safety, and achieve civilized construction practices.

[0003] As is known from existing technology, when pouring the roof of a building, the steel bars are cross-connected and fixed together. Both the steel bars and the slabs are poured into the concrete, or after they are fixed and shaped, the slabs and concrete are dismantled one by one. The entire operation requires a lot of manual labor, and all structural materials are put into the concrete, resulting in a certain amount of waste in terms of actual structural strength. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a prefabricated assembled steel truss floor deck structure.

[0005] This invention proposes a prefabricated assembled steel truss floor deck structure, comprising a steel plate on which multiple frames are mounted. Each frame includes main reinforcing bars, a first auxiliary reinforcing bar, and a second auxiliary reinforcing bar. Both the first and second auxiliary reinforcing bars are fitted into the steel plate. Bent reinforcing bars are welded between the main reinforcing bars and the second auxiliary reinforcing bars, and also between the first auxiliary reinforcing bars and the main reinforcing bars. The bent reinforcing bars are bent into a wavy structure. The main reinforcing bars, the first auxiliary reinforcing bars, and the second auxiliary reinforcing bars are combined into a triangular structure by the bent reinforcing bars. The main reinforcing bars are welded between two bent reinforcing bars, and the first and second auxiliary reinforcing bars are respectively welded to the sides of the two bent reinforcing bars that are far apart from each other.

[0006] The steel plate has multiple grooves. The bent steel bar is welded to the second auxiliary steel bar and the first auxiliary steel bar to form a corner. The grooves and corners are used in conjunction. The side of the steel plate away from the frame is provided with a connecting mechanism. The connecting mechanism includes a sealing plate, a connecting body and a fixing plate. The connecting body passes through the sealing plate and is inserted into the groove. One end of the connecting body is engaged with the corner. The fixing plate is fixedly connected to the sealing plate. The connecting body also passes through the fixing plate. The frame is detachably fixedly connected to the steel plate through multiple connecting mechanisms.

[0007] The steel plate has a top surface with multiple frames on one side and a bottom surface with multiple connecting mechanisms on the other side. The top surface is used for pouring concrete.

[0008] Preferably, one end of the connector inserted into the groove is configured as a forked end, the forked end being respectively formed with a hook-shaped shaft and a support shaft, the hook-shaped shaft being hooked into the corner, and the support shaft being abutted against the inner wall of the groove.

[0009] Preferably, arc-shaped shafts are symmetrically fixedly connected to both sides of the forked end, holes are opened in the connecting body, a balloon is placed in the forked end, one end of the balloon is an air tube, the air tube passes through the hole, and a hole is opened on one side of the hole, through which the air tube passes.

[0010] Preferably, the side surface of the connector near the fixed plate has a first opening, and the surface with the first opening is the front snap-fit ​​surface. The fixed plate has a second opening on one side, and the surface with the second opening is the rear snap-fit ​​surface. The openings of the front snap-fit ​​surface and the rear snap-fit ​​surface are arranged opposite to each other, and an elastic mechanism connects the second opening and the first opening.

[0011] Preferably, the elastic mechanism includes an L-shaped plate, one end of which is attached to the surface of the sealing plate and has a second locking shaft on its side, which is engaged in the second opening. The other end of the L-shaped plate is attached to the side of the connecting body and has a first locking shaft, which is installed into the first opening from the front engaging surface.

[0012] Preferably, a rotating shaft is rotatably connected to the surface of the L-shaped plate via a rotating component. The rotating shaft is in contact with the surface of the connecting body, and the rotating shaft and the first retaining shaft are respectively disposed on two opposite surfaces of the connecting body.

[0013] Preferably, a torsion spring is fitted onto the surface of the rotating component, and the two ends of the torsion spring are respectively connected to the L-shaped plate and the rotating shaft.

[0014] Preferably, multiple steel pipes are connected between the frames, and the steel pipes are arranged perpendicularly to each other with the frames. The edges of two adjacent steel plates overlap each other, and the overlapping positions are fixed together by screws.

[0015] The construction method and steps for prefabricated assembled steel truss floor slab structures are as follows:

[0016] Floor decking installation:

[0017] Each frame is placed upside down, and steel plates are placed on the surface of multiple frames. The corners of the frames are inserted into the grooves, and the steel plates are fixed to the frames through a connecting mechanism.

[0018] Specifically: After the corner is inserted into the groove, the forked end of the connector is inserted into the groove. The steel material itself has a certain toughness and can undergo a certain degree of deformation. The forked end is smoothly inserted into the groove, the hook-shaped shaft is hooked with the corner, and the support shaft contacts and abuts against the inner wall of the groove.

[0019] Insert the sealing plate from the other end of the connector and abut it against the surface of the steel plate;

[0020] The elastic mechanism fixes the relative position of the connector and the sealing plate. The first locking shaft at one end of the L-shaped plate is inserted into the first opening from the front locking surface, and the second locking shaft at the other end of the L-shaped plate is inserted into the second opening.

[0021] Rotate the pivot to clamp and fix the connector, and inflate the balloon with enough air through the air tube to fill the space between the two arc-shaped axes. After the balloon is full, tie one end of the air tube directly.

[0022] Multiple steel pipes connect the frames, and the steel pipes are set perpendicular to each other. The edges of two adjacent steel plates overlap each other, and the overlapping positions are fixed together by screws.

[0023] The steel plate has a top surface with multiple frames and a bottom surface with multiple connecting mechanisms. The top surface is used for pouring concrete.

[0024] The assembled steel trusses are placed between building floors, and multiple trusses are spliced ​​and fixed using expansion bolts;

[0025] Pouring the top slab and removing the slab:

[0026] Concrete is poured onto the upper surface of the truss. After the top plate is formed, the connecting mechanism and the steel plate are detachable. The air tube is untied and the air in the balloon is released. Due to the air, no concrete is poured into the bifurcation end of the connector and the two arc shafts. The adhesion area between the connecting mechanism and the concrete is very limited. Therefore, the workers remove the connector from the groove. After each connecting mechanism is removed, the concrete attached to its surface is removed. The steel plate is removed, and the top plate is sprayed with mortar and smoothed.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. After the top is cast, the connection mechanism and the steel plate are detachable. By unwinding the air pipe and releasing the air from the balloon, the workers can easily remove the connector from the groove. After removing each connection mechanism, the concrete adhering to its surface is cleaned off, and it can be reused. After removing the connection mechanism, the steel plate can also be removed. After cleaning off the concrete on the surface, it can be reused. Compared with the structure that is directly welded, the recycling can reduce the construction cost. At the same time, the detachable structure also facilitates the later demolding operation.

[0029] 2. The frame in this invention can be prefabricated in the factory. The bent steel bars have a regular wavy structure. Mass production can be achieved through mechanical bending, eliminating the need for manual operation. The main steel bars, the first auxiliary steel bars, and the second auxiliary steel bars form a triangular structure for placement and fixation. The combined triangular structure is stable and can effectively avoid damage and maintain the integrity of the structure during installation and transportation. Then, bent steel bars are welded in between. The welding operation of the bent steel bars can also be prefabricated in the factory. Subsequently, the steel plates are spliced ​​with the frame. Attached Figure Description

[0030] Figure 1 This is a top view of the floor decking structure proposed in this invention.

[0031] Figure 2 This is a bottom view of the floor decking structure proposed in this invention;

[0032] Figure 3 This is a structural diagram of a single frame;

[0033] Figure 4 A schematic diagram of the connecting mechanism;

[0034] Figure 5 This is a schematic diagram of the front contact surface structure of the connecting mechanism;

[0035] Figure 6 This is a schematic diagram of the rear locking surface structure of the connecting mechanism.

[0036] In the diagram: 1. Steel plate, 2. Main reinforcing bar, 3. First auxiliary reinforcing bar, 4. Second auxiliary reinforcing bar, 5. Bent reinforcing bar, 6. Groove, 7. Sealing plate, 8. Fixing plate, 9. L-shaped plate, 10. Connector, 11. First opening, 12. First retaining shaft, 13. Hook-shaped shaft, 14. Support shaft, 15. Arc-shaped shaft, 16. Balloon, 17. Hole, 18. Corner, 19. Second opening, 20. Rotating shaft, 21. Second retaining shaft, 22. Rotating component, 23. Air pipe. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Reference Figures 1-6 A prefabricated assembled steel truss floor deck structure includes a steel plate 1, on which multiple frames are installed. Each frame includes a main steel bar 2, a first auxiliary steel bar 3, and a second auxiliary steel bar 4. The first auxiliary steel bar 3 and the second auxiliary steel bar 4 are both attached to the steel plate 1. A bent steel bar 5 is welded between the main steel bar 2 and the second auxiliary steel bar 4. A bent steel bar 5 is also welded between the first auxiliary steel bar 3 and the main steel bar 2. The bent steel bar 5 is bent into a wavy structure. The main steel bar 2, the first auxiliary steel bar 3, and the second auxiliary steel bar 4 are combined into a triangular structure by the bent steel bar 5. The main steel bar 2 is welded between two bent steel bars 5, and the first auxiliary steel bar 3 and the second auxiliary steel bar 4 are respectively welded to the two bent steel bars 5 on the sides away from each other.

[0039] Multiple grooves 6 are provided on the steel plate 1. The bent reinforcing bar 5 is welded to the second auxiliary reinforcing bar 4 and the first auxiliary reinforcing bar 3 to form a corner 18. The grooves 6 and the corner 18 are used in conjunction. A connecting mechanism is provided on the side of the steel plate 1 away from the frame. The connecting mechanism includes a sealing plate 7, a connecting body 10 and a fixing plate 8. The connecting body 10 passes through the sealing plate 7 and is inserted into the groove 6. One end of the connecting body 10 is engaged with the corner 18. The fixing plate 8 is fixedly connected to the sealing plate 7. The connecting body 10 also passes through the fixing plate 8. The frame is detachably fixedly connected to the steel plate 1 through multiple connecting mechanisms. The side of the steel plate 1 with multiple frames is the upper surface, and the side with multiple connecting mechanisms is the lower surface. The upper surface is used for pouring concrete.

[0040] One end of the connector 10 inserted into the groove 6 is designed as a forked end, with a hook-shaped shaft 13 and a support shaft 14 respectively formed at the forked end. The hook-shaped shaft 13 is hooked and engaged with the corner 18, and the support shaft 14 is abutted against the inner wall of the groove 6. When the connector 10 is inserted into the groove 6, one of the forked hook-shaped shafts 13 hooks and engages with the corner 18, while the other support shaft 14 abuts against the inner wall of the groove 6. This allows the connector 10 to be well engaged and fixed with the bent reinforcing bar 5, and utilizes the elasticity of the steel itself to allow for detachable engagement.

[0041] An arc-shaped shaft 15 is symmetrically fixedly connected to both sides of the forked end. A hole 17 is opened in the connecting body 10. A balloon 16 is placed in the forked end. One end of the balloon 16 is an air tube 23. The air tube 23 passes through the hole 17. A hole is opened on one side of the hole 17. The air tube 23 passes through the hole.

[0042] After the connector 10 is installed and fixed, the balloon 16 is inflated by the air pipe 23, and the space between the hook shaft 13, the support shaft 14 and the arc shaft 15 is filled with air by the balloon 16. When pouring concrete, the air occupies the space and prevents the concrete from being poured in. Therefore, after the top wall is poured, the connecting mechanism and the steel plate 1 can be disassembled smoothly.

[0043] A first opening 11 is formed on the side surface of the connector 10 near the fixing plate 8. The surface with the first opening 11 is the front engaging surface. A second opening 19 is formed on one side of the fixing plate 8. The surface with the second opening 19 is the rear engaging surface. The openings of the front and rear engaging surfaces are oriented opposite to each other. An elastic mechanism connects the second opening 19 and the first opening 11. Slots are formed on one side of the connector 10 and one side of the second opening 19, with the openings of the two slots oriented opposite to each other. When the two ends of the elastic mechanism engage with the connector 10 and the first opening 11 respectively, the relative position of the connector 10 relative to the fixing plate 8 and the sealing plate 7 can be fixed, thereby achieving the effect of fixing the position of the connector 10.

[0044] The elastic mechanism includes an L-shaped plate 9. One end of the L-shaped plate 9 is attached to the surface of the sealing plate 7, and a second locking shaft 21 is provided on its side. The second locking shaft 21 is engaged in the second opening 19. The other end of the L-shaped plate 9 is attached to the side of the connecting body 10, and a first locking shaft 12 is provided thereon. The first locking shaft 12 is installed into the first opening 11 from the front engaging surface. By engaging one end of the L-shaped plate 9 with the first opening 11 and the other end with the second locking shaft 21, the first opening 11 and the second locking shaft 21 are engaged on two opposing surfaces, thereby fixing the relative position of the connecting body 10 through the L-shaped plate 9.

[0045] A rotating shaft 20 is rotatably connected to the surface of the L-shaped plate 9 via a rotating component 22. The rotating shaft 20 is in contact with the surface of the connecting body 10. The rotating shaft 20 and the first retaining shaft 12 are respectively disposed on two opposite surfaces of the connecting body 10. To increase the stability of the engagement between the L-shaped plate 9 and the connecting body 10 and the sealing plate 7, the rotating shaft 20 is rotatably installed on its surface. Through the cooperation of the rotating shaft 20 and the first retaining shaft 12, the friction force can achieve a clamping effect relative to the connecting body 10, further enhancing the stability of the connection.

[0046] A torsion spring (not shown) is fitted onto the surface of the rotating component 22. The two ends of the torsion spring are connected to the L-shaped plate 9 and the rotating shaft 20, respectively. Under the action of the torsion spring, the rotating shaft 20 can remain stable after rotating relative to the L-shaped plate 9 at a certain angle and can withstand a certain amount of external force. Multiple steel pipes (not shown) connect the frames. The steel pipes are perpendicular to each other, and the edges of two adjacent steel plates 1 overlap. The overlapping positions are fixed together with screws to further reinforce the overall structure.

[0047] The frame in this invention can be prefabricated in the factory. The bent steel bar 5 has a regular wavy structure. It can be mass-produced by mechanical bending, so no manual operation is required. The main steel bar 2, the first auxiliary steel bar 3, and the second auxiliary steel bar 4 form a triangular structure for placement and fixation. The combined triangular structure is stable and can effectively avoid damage and keep the structure intact during installation and transportation. Then, the bent steel bar 5 is welded in between. The welding operation of the bent steel bar 5 can also be prefabricated in the factory. Then, the steel plate 1 is spliced ​​with the frame.

[0048] Each frame is placed upside down, and steel plates 1 are placed on the surface of multiple frames. The corners 18 in the frames are inserted into the grooves 6 respectively. The steel plates 1 are then fixed to the frames through the connecting mechanism. The assembly of the entire prefabricated steel truss can be completed in the factory. Finally, the assembled steel truss is placed between the building floors. Multiple trusses are spliced ​​and fixed by expansion bolts, etc., and fixed at the top of the floor. Then, concrete is poured accordingly.

[0049] After the top is cast, the connecting mechanism and the steel plate 1 are detachable. The air pipe 23 is untied and the air in the balloon 16 is released. Because the air occupies the bifurcation end of the connecting body 10, no concrete is poured in, so the adhesion area between the connecting mechanism and the concrete is very limited. Therefore, the workers can easily remove the connecting body 10 from the groove 6. After each connecting mechanism is removed, the concrete attached to its surface is cleaned off, and it can be reused. After the connecting mechanism is removed, the steel plate 1 can also be removed. After cleaning the concrete on the surface, it can be reused. Compared with the structure of direct welding, the recycling can reduce the construction cost. At the same time, the detachable structure also facilitates the later demolding operation.

[0050] The installation method of the connecting mechanism is as follows: After the corner 18 is inserted into the groove 6, the forked end of the connecting body 10 is first inserted into the groove 6. The steel material itself has a certain toughness and can undergo a certain degree of deformation, so the forked end can be smoothly inserted into the groove 6. The hook-shaped shaft 13 will hook onto the corner 18, and the support shaft 14 will contact and abut against the inner wall of the groove 6. Then, the sealing plate 7 is inserted from the other end of the connecting body 10 and abuts against the surface of the steel plate 1. The relative position of the connecting body 10 and the sealing plate 7 is then fixed by the elastic mechanism. The first locking shaft 1 at one end of the L-shaped plate 9... 2. Insert the front snap-fit ​​surface into the first opening 11, and insert the second snap-fit ​​shaft 21 at the other end of the L-shaped plate 9 into the second opening 19. Then rotate the rotating shaft 20 to clamp and fix the connector 10. Finally, fill the balloon 16 with enough air through the air tube 23 to fill the space between the two arc-shaped shafts 15. After the balloon 16 is filled, simply tie one end of the air tube 23. The entire installation snap-fit ​​process is simple, direct and very stable. It is also very quick for workers to operate and can all be assembled in the factory without taking up construction time, thus effectively improving work efficiency.

[0051] The construction method and steps for prefabricated assembled steel truss floor slab structures are as follows:

[0052] Floor decking installation:

[0053] Each frame is placed upside down, and steel plates 1 are placed on the surface of multiple frames. The corners 18 in the frames are inserted into the grooves 6 respectively, and the steel plates 1 are fixed to the frames through the connecting mechanism.

[0054] Specifically: After the corner 18 is inserted into the groove 6, the forked end of the connector 10 is inserted into the groove 6. The steel material itself has a certain toughness and can undergo a certain degree of deformation. The forked end is smoothly inserted into the groove 6, the hook-shaped shaft 13 is hooked with the corner 18, and the support shaft 14 contacts and abuts against the inner wall of the groove 6.

[0055] Insert the sealing plate 7 from the other end of the connector 10 and abut it against the surface of the steel plate 1;

[0056] The elastic mechanism fixes the relative position of the connector 10 and the sealing plate 7. The first locking shaft 12 at one end of the L-shaped plate 9 is inserted into the first opening 11 from the front locking surface, and the second locking shaft 21 at the other end of the L-shaped plate 9 is inserted into the second opening 19.

[0057] Rotate the shaft 20 to clamp and fix the connector 10, and fill the balloon 16 with enough air through the air tube 23 to fill the space between the two arc-shaped shafts 15. After the balloon 16 is filled, tie one end of the air tube 23 directly.

[0058] Multiple steel pipes connect the frames, and the steel pipes are set perpendicular to each other. The edges of two adjacent steel plates 1 overlap each other, and the overlapping positions are fixed together by screws.

[0059] The steel plate 1 has a top surface with multiple frames and a bottom surface with multiple connecting mechanisms. The top surface is used for pouring concrete.

[0060] The assembled steel trusses are placed between building floors, and multiple trusses are spliced ​​and fixed using expansion bolts;

[0061] Pouring the top slab and removing the slab:

[0062] Concrete is poured onto the upper surface of the truss. After the top plate is formed, the connecting mechanism and the steel plate 1 are detachably connected. The air pipe 23 is untied and the air in the balloon 16 is released. Due to the air, no concrete is poured into the bifurcation end of the connecting body 10 and the two arc-shaped shafts 15. The bonding area between the connecting mechanism and the concrete is very limited. Therefore, the workers remove the connecting body 10 from the groove 6. After each connecting mechanism is removed, the concrete attached to its surface is removed. The steel plate 1 is removed, and the top plate is sprayed with mortar and smoothed.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A prefabricated steel bar truss floor deck structure comprising a steel plate (1), characterized in that, The steel plate (1) is provided with a plurality of frames, the frame comprises a main steel bar (2), a first auxiliary steel bar (3), a second auxiliary steel bar (4), the first auxiliary steel bar (3) and the second auxiliary steel bar (4) are arranged in combination with the steel plate (1), the main steel bar (2) and the second auxiliary steel bar (4) are welded with a bent steel bar (5), the first auxiliary steel bar (3) and the main steel bar (2) are also welded with a bent steel bar (5), the bent steel bar (5) is bent into a wave-shaped structure, the main steel bar (2), the first auxiliary steel bar (3) and the second auxiliary steel bar (4) are combined into a triangular structure through the bent steel bar (5), the main steel bar (2) is welded between two bent steel bars (5), and the first auxiliary steel bar (3) and the second auxiliary steel bar (4) are respectively welded on the sides of the two bent steel bars (5) away from each other. A plurality of grooves (6) are formed in the steel plate (1), the bent steel bar (5) is welded with the second auxiliary steel bar (4) and the first auxiliary steel bar (3) to form a corner (18), the grooves (6) are used in cooperation with the corner (18), one side of the steel plate (1) away from the frame is provided with a connecting mechanism, the connecting mechanism comprises a sealing plate (7), a connecting body (10) and a fixed plate (8), the connecting body (10) is inserted into the groove (6) through the sealing plate (7), and one end of the connecting body (10) is clamped with the corner (18), the fixed plate (8) is fixedly connected to the sealing plate (7), and the connecting body (10) also passes through the fixed plate (8), and the frame is detachably connected with the steel plate (1) through a plurality of connecting mechanisms. One side of the steel plate (1) provided with a plurality of frames is an upper surface, and one side of the steel plate (1) provided with a plurality of connecting mechanisms is a lower surface, and the upper surface is used for pouring concrete. One end of the connecting body (10) inserted into the groove (6) is provided as a bifurcated end, the bifurcated end is respectively provided with a hook-shaped shaft (13) and a supporting shaft (14), the hook-shaped shaft (13) is clamped with the corner (18) in a hooking manner, and the supporting shaft (14) is arranged in abutment with the inner wall of the groove (6). The bifurcated end is symmetrically fixedly connected with an arc-shaped shaft (15), the connecting body (10) is provided with a hole (17), the bifurcated end is provided with a balloon (16), one end of the balloon (16) is a gas pipe (23), the gas pipe (23) passes through the hole (17), one side of the hole (17) is provided with a hole, and the gas pipe (23) passes through the hole.

2. The prefabricated steel bar truss floor deck structure according to claim 1, characterized in that, A first opening (11) is formed in the side surface of one end of the connecting body (10) close to the fixed plate (8), the surface provided with the first opening (11) is a front clamping surface, a second opening (19) is formed in one side of the fixed plate (8), the surface provided with the second opening (19) is a rear clamping surface, the openings of the front clamping surface and the rear clamping surface are arranged to be away from each other, and the second opening (19) and the first opening (11) are connected with an elastic mechanism.

3. The prefabricated steel bar truss floor deck structure according to claim 2, characterized in that, The elastic mechanism comprises an L-shaped plate (9), one end of the L-shaped plate (9) is attached to the surface of the sealing plate (7), and a second clamping shaft (21) is arranged on the side surface of the L-shaped plate (9) and is clamped in the second opening (19), the other end of the L-shaped plate (9) is attached to the side surface of the connecting body (10) and is provided with a first clamping shaft (12), and the first clamping shaft (12) is installed into the first opening (11) from the front clamping surface.

4. The prefabricated steel bar truss floor deck structure according to claim 3, characterized in that, A rotating shaft (20) is rotatably connected to the surface of the L-shaped plate (9) through a rotating piece (22), the rotating shaft (20) is attached to the surface of the connecting body (10), and the rotating shaft (20) and the first clamping shaft (12) are respectively arranged on the two opposite surfaces of the connecting body (10).

5. The prefabricated steel bar truss floor deck structure according to claim 4, characterized in that, A torsional spring is sleeved on the surface of the rotating piece (22), and the two ends of the torsional spring are respectively connected with the L-shaped plate (9) and the rotating shaft (20).

6. The prefabricated steel bar truss floor deck structure according to claim 5, wherein, A plurality of steel pipes are connected between the frames, the steel pipes and the frames are arranged perpendicular to each other, the edges of the two adjacent steel plates (1) are arranged overlapping each other, and the overlapping positions are fixedly connected together by screws.

7. The construction method of the prefabricated assembly type steel bar truss floor deck structure according to claim 6, characterized in that, The construction steps are as follows: The floor support plate is installed: Each frame is placed upside down, the steel plate (1) is placed on the surface of the plurality of frames, the corners (18) in the frame are respectively inserted into the grooves (6), and the fixing between the steel plate (1) and the frame is realized through the connecting mechanism; Specifically, after the corner (18) is inserted into the groove (6), the bifurcated end of the connecting body (10) is inserted into the groove (6), the steel material itself has a certain toughness and can be deformed to a certain extent, the bifurcated end is smoothly clamped into the groove (6), the hook-shaped shaft (13) is hooked with the corner (18), and the supporting shaft (14) is in contact with the inner wall of the groove (6). The sealing plate (7) is sleeved from the other end of the connecting body (10) and abuts against the surface of the steel plate (1); The relative positions of the connecting body (10) and the sealing plate (7) are fixed by the elastic mechanism, the first clamping shaft (12) at one end of the L-shaped plate (9) is clamped into the first opening (11) from the front clamping surface, and the second clamping shaft (21) at the other end of the L-shaped plate (9) is clamped into the second opening (19); The connecting body (10) is clamped and fixed by rotating the rotating shaft (20), and sufficient air is filled into the balloon (16) through the air pipe (23), so as to fill the space range between the two arc-shaped shafts (15), and after the balloon (16) is filled, the end of the air pipe (23) is ligated; A plurality of steel pipes are connected between the frames, the steel pipes and the frames are arranged perpendicular to each other, the edges of the two adjacent steel plates (1) are arranged overlapping each other, and the overlapping positions are fixedly connected together by screws. One side of the steel plate (1) provided with a plurality of frames is an upper surface, and the other side provided with a plurality of connecting mechanisms is a lower surface, and the upper surface is used for pouring concrete; The assembled steel bar truss is placed between the building floors, and the splicing and fixing of a plurality of trusses are realized through expansion bolts; Pouring the top plate and removing the plate: The concrete is poured on the upper surface of the truss, after the top plate is formed, the connecting mechanism and the steel plate (1) are detachably connected, the air pipe (23) is unfastened and the air in the air bag (16) is released, the bifurcated end of the connecting body (10) and the inside of the two arc-shaped shafts (15) are not filled with concrete due to the occupation of air, the sticking area of the connecting mechanism itself to the concrete is very limited, then the workers take the connecting body (10) out of the groove (6), after the connecting mechanisms are taken out, the concrete adhered to the surface of the connecting mechanisms is treated, the steel plate (1) is removed, and the top plate is sprayed with mortar and is treated by being smoothed.

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