Prefabricated steel bar truss floor support plate combined structure and construction method thereof

Abstract

This invention relates to the field of building construction technology, and more particularly to a prefabricated steel truss floor deck composite structure and its construction method. The prefabricated steel truss floor deck composite structure includes a floor deck with multiple steel trusses assembled in parallel on it. Each steel truss consists of web members, a lower chord, and a upper chord. It also includes multiple connectors spaced at intervals along the edges of the floor deck, which initially connect the floor deck and the steel trusses into a single unit. Multiple mounting slots are arrayed on the floor deck, and reinforcement members for strengthening the lower chords of the steel trusses are installed within these slots. This invention, by initially positioning and fixing the floor deck and steel trusses using connectors, then using reinforcement members to further tighten the lower chords of the steel trusses, and by using tightening devices to enhance the connection between the transverse steel trusses, significantly improves the stability and load-bearing capacity of the entire structure.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to prefabricated steel truss floor deck composite structures and their construction methods. Background Technology

[0002] In recent years, prefabricated steel truss floor slab composite structures have been widely used in the construction industry due to their advantages in construction efficiency, weight control, and mechanical performance. This structural system combines prefabricated steel trusses with concrete floor slabs to form a composite structure that is both load-bearing and provides convenient construction conditions. The steel trusses not only serve as formwork support during concrete pouring but also participate in the overall stress distribution of the final structure, thereby improving the safety and stability of the building structure. Furthermore, the design of this composite structure allows most of the work to be completed in the factory, reducing on-site work time and costs while improving the consistency of construction quality.

[0003] Despite the numerous advantages of prefabricated steel truss floor decking structures, several challenges remain in practical applications. Firstly, the connection between the formwork and the steel truss often relies on traditional locking methods. While this initially ensures stability, it leads to numerous pits after formwork removal, affecting the integrity and aesthetics of the floor slab surface and potentially increasing costs and leakage risks due to hole repairs. Secondly, reinforcement measures at truss joints are inadequate, relying mainly on manual tying of reinforcing bars or wires, which can easily result in uneven joint strength, affecting the overall load-bearing capacity of the floor slab and even posing safety hazards. Finally, the efficiency of joint treatment and removal in the formwork system is low. Traditional joint treatment methods are prone to grout leakage, and the formwork is difficult to remove during recycling, easily damaged, reducing its reusability and increasing construction costs. Therefore, we propose a prefabricated steel truss floor decking structure and its construction method to overcome these shortcomings. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a prefabricated steel truss floor decking composite structure and its construction method.

[0005] The technical implementation scheme of this invention is as follows: a prefabricated steel truss floor decking composite structure, comprising a floor decking, which is the main assembly of the structure. Multiple steel trusses are assembled parallel to each other on the floor decking. Each steel truss consists of web members, a lower chord, and an upper chord. Two lower chords are located below the steel truss, and the upper chord is located above the steel truss. The web members form the main structure of the steel truss and connect the upper and lower chords. The web members, lower chord, and upper chord together form a triangular steel truss. The structure also includes multiple connectors spaced apart at the edges of both sides of the floor decking. These connectors are used to initially connect the floor decking and the steel trusses into a single unit. Multiple mounting slots are arrayed on the floor deck, and reinforcement components for strengthening the lower chord of the steel truss are installed in the mounting slots of the floor deck. The reinforcement components include steel sheets and clamping blocks. The steel sheets pass through one side of the mounting slot of the floor deck, go around the lower chord of the steel truss, and exit from the other side. The clamping blocks press and lock into the opening of the steel sheets. The clamping blocks consist of elastic blocks and pull rings. The elastic blocks fit and press against the bent opening of the steel sheets. Pull rings are fixedly installed on the elastic blocks. A first overlapping plate is fixedly connected to one longitudinal side of the floor deck, and a second overlapping plate is fixedly connected to the other longitudinal side of the floor deck. The first overlapping plate and the second overlapping plate are provided with "U"-shaped buckle plates with opposite openings.

[0006] As an improvement to the above solution, the connector includes a force block, a hook, a rubber pad, a lever, and a pressure block. A force block is provided on the side of the floor deck away from the steel truss edge. A hook is slidably connected through the force block. The hook penetrates the floor deck and hooks under the bottom of the web member. A section of the hook that penetrates the force block is a hinged rod. A rubber pad is provided on the side of the force block away from the hook. The end of the hinged rod slides through the rubber pad and is hinged to a lever. A pressure block is fixedly connected to the lever near the rubber pad. The pressure block is in contact with the rubber pad.

[0007] As an improvement to the above solution, the two end faces of the steel sheet and the clamping block are provided with mutually compatible mating teeth. The meshing of the mating teeth can improve the stability of the steel sheet and the clamping block after they are mated.

[0008] As an improvement to the above solution, a reinforcing rib is provided on the side of the first overlapping plate away from the buckle plate. A "V" shaped groove is provided at the reinforcing rib of the first overlapping plate. The groove of the first overlapping plate can be bent so that the first overlapping plate can be easily connected to the second overlapping plate. Screws can be driven into the groove of the first overlapping plate.

[0009] As an improvement to the above solution, a positioning buckle is fixedly installed on the side of the second overlapping plate of the floor deck. The "U"-shaped buckle plate end of the first overlapping plate is provided with an extension plate. The extension plate of the first overlapping plate is provided with a slot adapted to the positioning buckle. After the first overlapping plate and the second overlapping plate are snapped together, the slot on the extension plate of the first overlapping plate will be snapped into the corresponding floor deck.

[0010] As an improvement to the above solution, a joint plate is fixedly installed on one side of the floor deck. The joint plate protrudes from the edge of the floor deck and is a downwardly recessed "V"-shaped plate. The other side of the floor deck is provided with a "V"-shaped groove to accommodate the joint plate.

[0011] As an improvement to the above solution, a fastening device is provided between adjacent steel trusses for fastening. The fastening device includes a main rod, a fixed rod, a threaded rod, a limiting rod, and a tightening nut. One end of the main rod is vertically fixedly connected to the fixed rod, and the end of the main rod away from the fixed rod is fixedly provided with a threaded rod. The limiting rod is threadedly connected to the threaded rod through a tightening nut, and the limiting rod and the tightening nut are rotatably engaged.

[0012] As an improvement to the above scheme, a construction method for a prefabricated steel truss floor deck composite structure includes the following steps: S1. Erect temporary support frames and arrange the steel trusses on the assembly site. Place the floor deck with pre-installed connectors on multiple sets of steel trusses. Initially fix the steel trusses to the floor deck using connectors. Then, use reinforcements to tighten the lower chord of the steel trusses a second time to ensure that the steel trusses are firmly connected to the floor deck. S2. The floor decking, with its connectors and reinforcements securely assembled, will be hoisted to the designated construction position on the building where the corresponding support system has been pre-installed. Construction workers will then longitudinally slide and snap together adjacent floor deckings using the first and second lap plates, and use positioning rods and snap-fits to achieve precise alignment. Bolts will be driven into the first and second lap plates to enhance structural strength. S3. Tightening devices are used between the steel trusses to enhance lateral stability. Finally, bolts are driven into the joint plates and tightened to ensure a stable splicing between the transverse floor slabs. Concrete is then poured onto the steel trusses on the floor slabs. After the concrete reaches the specified strength, the support system is removed to complete the floor slab construction.

[0013] The present invention has the following advantages: 1. After initially positioning and fixing the floor deck and steel truss with connectors, the present invention uses reinforcements to tighten the lower chord of the steel truss for a second time, and uses tightening devices to enhance the connection between the transverse steel trusses, which significantly improves the stability and load-bearing capacity of the entire structure.

[0014] 2. The present invention can ensure precise connection between adjacent floor decks by designing the first and second overlapping plates, along with the application of positioning rods and bayonets, thereby improving the splicing accuracy and stability of the overall structure.

[0015] 3. The present invention improves the disassembly of the floor deck and steel truss combination structure by using the pull ring inside the clamping block in conjunction with the locking structure of the lever to pull the hook. At the same time, the first lap plate, the second lap plate and the joint plate can also be flexibly disassembled and assembled by tightening and loosening bolts, improving the flexibility and efficiency of disassembly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the floor deck and steel truss assembly state of the present invention.

[0018] Figure 3 This is a cross-sectional view of the floor deck and steel truss assembly of the present invention.

[0019] Figure 4 This is a schematic diagram of the steel sheet and connector assembly of the steel truss on the floor deck of the present invention.

[0020] Figure 5 This is a schematic diagram of the components of the present invention, including the force block, hook, hinge rod, rubber pad, and lever.

[0021] Figure 6 This is a three-dimensional structural diagram of the steel sheet, elastic block, pull ring, and mating teeth of the present invention.

[0022] Figure 7 This is a diagram showing the fit between the first overlapping plate, the second overlapping plate, and the positioning buckle of the present invention.

[0023] Figure 8 This is a schematic diagram of the first and second overlapping plates of the present invention in a separated state.

[0024] Figure 9 This is a schematic diagram showing the docking state of the first and second lap plates of the present invention.

[0025] Figure 10 This is a schematic diagram of the joint plate between floor decking slabs according to the present invention.

[0026] Figure 11 This is a schematic diagram of the main rod, fixing rod, and limiting rod used in this invention to reinforce adjacent steel trusses.

[0027] The labels in the diagram are as follows: 1. Floor deck, 2. Steel truss, 21. Web member, 22. Lower chord, 23. Upper chord, 3. Connector, 31. Force block, 32. Hook, 33. Hinge rod, 34. Rubber pad, 35. Pulling rod, 36. Pressure block, 4. Reinforcing member, 41. Steel sheet, 42. Pressure block, 421. Elastic block, 422. Pull ring, 43. Butt joint tooth, 5. First lap plate, 51. Fold groove, 6. Second lap plate, 7. Positioning buckle rod, 8. Joint plate, 9. Tightening member, 91. Main rod, 92. Fixing rod, 93. Threaded rod, 94. Limiting rod, 95. Tightening nut. Detailed Implementation

[0028] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0029] Example 1: Prefabricated steel truss floor deck composite structure, such as Figures 1-6As shown, the structure includes a floor deck 1, which is the main assembly of the structure. Multiple steel trusses 2 are assembled in parallel on the floor deck 1. Each steel truss 2 consists of web members 21, a lower chord 22, and an upper chord 23. Two lower chords 22 are located below the steel truss 2, and the upper chord 23 is located above the steel truss 2. The web members 21 form the main structure of the steel truss 2 and connect the upper chord 23 and the lower chord 22. The web members 21, lower chord 22, and upper chord 23 together form a triangular steel truss 2. The structure also includes multiple steel trusses 2 spaced apart on the floor deck 1. Multiple connectors 3 are located on the edge of the side panel. These connectors 3 are used to initially connect the floor deck 1 and the steel truss 2 into a single unit. Multiple mounting slots are arrayed on the floor deck 1. Reinforcing members 4 for strengthening the lower chord 22 of the steel truss 2 are installed within the mounting slots of the floor deck 1. The reinforcing members 4 include steel plates 41 and clamping blocks 42. The steel plates 41 are inserted into one side of the mounting slot of the floor deck 1, pass around the lower chord 22 of the steel truss 2, and exit from the other side. The clamping blocks 42 are pressed and locked into the opening of the steel plates 41. The clamping blocks 42 are secured by elastic blocks 4. 21 and pull ring 422, elastic block 421 are adapted and pressed into the bent opening of steel sheet 41. Pull ring 422 is fixedly installed on elastic block 421. During assembly, floor deck 1 is placed on multiple arranged steel trusses 2. After the floor deck 1 and steel trusses 2 are initially arranged and connected by connector 3, the steel sheet 41 is inserted into the installation groove of floor deck 1 to bind the lower chord 22 of steel truss 2. Then, the elastic block 421 on the pressing block 42 is pressed into the opening of steel sheet 41, so that steel sheet 41 is firmly pressed into floor deck 1. When the floor deck 1 and steel truss 2 need to be removed later, the clamping block 42 can be easily pulled out of the steel plate by the pull ring 422, making it easy to remove the steel plate. The floor deck 1 is fixedly connected to a first lap plate 5 on one longitudinal side and a second lap plate 6 on the other longitudinal side. The first lap plate 5 and the second lap plate 6 are provided with "U"-shaped buckle plates with opposite openings. After the first lap plate 5 and the second lap plate 6 are slidably inserted, the adjacent floor deck 1 can be fixedly spliced, improving the stability between the prefabricated floor deck 1.

[0030] like Figures 3-5As shown, the connector 3 includes a force-bearing block 31, a hook 32, a rubber pad 34, a lever 35, and a pressure block 36. A force-bearing block 31 is provided on the side of the floor deck 1 facing away from the steel truss 2. A hook 32 is slidably connected through the force-bearing block 31. The hook 32 penetrates the floor deck 1 and hooks under the web member 21. A section of the hook 32 that penetrates the force-bearing block 31 is a hinged rod 33. A rubber pad is provided on the side of the force-bearing block 31 away from the hook 32. 34. The end of the hinge rod 33 slides through the rubber pad 34 and is hinged to a lever 35. A pressure block 36 is fixedly connected to the lever 35 near the rubber pad 34. The pressure block 36 is in contact with the rubber pad 34. By rotating the lever 35, the pressure block 36 on the lever 35 is pressed against the rubber pad 34 and pulls the hinge rod 33 and the hook 32, so that the hook 32 can be fastened to the bottom of the web member 21, so that the steel truss 2 can be initially assembled onto the floor slab 1.

[0031] like Figure 4 and Figure 6 As shown, the two ends of the steel sheet 41 and the clamping block 42 are provided with matching mating teeth 43. The meshing of the mating teeth 43 can improve the stability of the steel sheet 41 and the clamping block 42 after they are mated, and further improve the stability of the combined structure of the floor deck 1 and the steel truss 2.

[0032] like Figure 1 and Figure 7 As shown, the first overlapping plate 5 has a reinforcing rib on the side of the plate opposite to the buckle plate. The reinforcing rib of the first overlapping plate 5 has a "V" shaped groove 51. The groove 51 of the first overlapping plate 5 can be bent so that the first overlapping plate 5 can be easily connected to the second overlapping plate 6. Screws can be driven into the groove 51 of the first overlapping plate 5 to further tighten the first overlapping plate 5 and the second overlapping plate 6.

[0033] When assembling the floor deck and steel truss structure modularly, a temporary support frame is first erected near the construction site, and multiple rows of steel trusses 2 are arranged on the temporary support frame. During assembly, the floor deck 1 pre-installed with connectors 3 is laid on the multiple rows of steel trusses 2. The hooks 32 inside the connectors 3 are passed downward through the floor deck 1 and hooked onto the web members 21 of the steel trusses 2. Since the end of the hinge rod 33 of the hook 32 passes through the rubber pad 34 and is hinged to the lever 35, the assemblers use tools to lower the lever 35 towards the floor deck 1. The rotating lever 35 squeezes the rubber pad 34 through the pressure block 36 on the rod body, and drives the hinge rod 33 and the hook. 32 is tightened upwards, thereby locking the web member 21 with the hook 32, completing the initial fixation of the floor deck 1 and the steel truss 2. Then, the steel plate 41 of the reinforcement 4 is inserted from one side of the installation groove of the floor deck 1, passes around the lower chord 22 of the steel truss 2 and comes out from the other side. Then, the elastic block 421 of the clamping block 42 is hammered into the opening formed by the bending of the steel plate 41, so that the clamping block 42 can elastically squeeze the steel plate 41 open. At this time, the steel plate 41 and the clamping block 42 mesh and lock with the mating teeth 43, forming a secondary reinforcement of the lower chord 22. This process ensures the rigid connection between the steel truss 2 and the floor deck 1. At the same time, the pull ring 422 of the clamping block 42 is designed to facilitate later disassembly and maintenance.

[0034] Example 2: Based on Example 1, such as Figures 7-9 As shown, a positioning rod 7 is fixedly installed on the side of the second overlapping plate 6 of the floor deck 1. The "U"-shaped buckle plate end of the first overlapping plate 5 has an extension plate. The extension plate of the first overlapping plate 5 has a slot adapted to the positioning rod 7. After the first overlapping plate 5 and the second overlapping plate 6 are snapped together, the slot on the extension plate of the first overlapping plate 5 will be inserted into the corresponding floor deck 1, so that the first overlapping plate 5 and the second overlapping plate 6 can be accurately snapped together.

[0035] like Figure 1 and Figure 10 As shown, a joint plate 8 is fixedly installed on one side of the floor deck 1. The joint plate 8 protrudes from the edge of the floor deck 1 and is a downward-facing "V"-shaped recessed plate. The other side of the floor deck 1 is provided with a "V"-shaped groove that fits the joint plate 8. When two floor decks 1 are spliced ​​laterally, they can be connected at the joint of the floor deck 1 through the joint plate 8. Bolts are screwed into the joint plate 8, which can improve the stability of the lateral splicing of the floor deck 1 and also cover the gap between the floor decks 1.

[0036] like Figure 1 and Figure 11As shown, a fastening element 9 is provided between adjacent steel trusses 2 for fastening. The fastening element 9 includes a main rod 91, a fixed rod 92, a threaded rod 93, a limiting rod 94, and a tightening nut 95. One end of the main rod 91 is vertically fixed to the fixed rod 92, and the end of the main rod 91 away from the fixed rod 92 is fixed to the threaded rod 93. The limiting rod 94 is threadedly connected to the threaded rod 93 through the tightening nut 95. The limiting rod 94 and the tightening nut 95 are rotatably engaged. When the steel trusses 2 on the floor deck 1 are horizontally assembled and spliced, by tightening the tightening nut 95, the limiting rod 94 pulls the web members 21 of the steel trusses 2 on both sides of the joint towards the fixed rod 92, thereby improving the stability between the steel trusses 2.

[0037] Subsequently, the assembled floor deck 1 and steel truss 2 were lifted using hoisting equipment and placed at the designated construction location where the corresponding support system was pre-installed. Construction workers then longitudinally spliced ​​the two assembled floor deck 1 pieces at the construction location. The first lap plate 5 and the second lap plate 6 were aligned using a U-shaped snap-fit ​​structure. The snap-fit ​​on the extension of the first lap plate 5 precisely engaged with the positioning rod 7 of the second lap plate 6. The folded groove 51 was then fixed with screws to form a longitudinally continuous load-bearing structure, enhancing structural stability. When the assembled floor deck 1 was spliced ​​laterally, the floor deck 1 used the side joint plate 8 to fit into the adjacent V-shaped groove. After the V-shaped concave plate of the joint plate 8 covered the joint, it was tightened by bolts through the joint plate 8, sealing the gap and improving shear resistance. Finally, the steel truss 2 were horizontally spliced ​​using tightening fittings 9. To reinforce the structure, the fixing rod 92 and the limiting rod 94 of the main rod 91 are respectively inserted into the web members 21 of the adjacent steel truss 2. Then, when tightening the loosening nut 95 with a tool, the limiting rod 94 moves along the threaded rod 93 towards the fixing rod 92, tightening the web members 21 on both sides to form a rigid connection, enhancing the lateral integrity. After the splicing is completed, the floor deck 1 and the steel truss 2 form a stable combined platform. When pouring concrete, the upper chord 23, lower chord 22 and web members 21 of the steel truss 2 work together with the concrete to bear the load. The floor deck 1 participates in the structural load-bearing as a permanent formwork. After the concrete hardens, the temporary support system is removed. The combined structure transfers the load through multiple connections of longitudinal lap plates, transverse joint plates 8 and tightening parts 9, ultimately forming a high-rigidity, high-assembly-rate floor slab system, thus taking into account the needs of rapid construction and reversible demolition and modification, and is suitable for industrialized building scenarios.

[0038] A construction method for a prefabricated reinforced steel truss floor deck composite structure includes the following steps: S1. Erect a temporary support frame on the assembly site and arrange the steel truss 2. Place the floor deck 1 with pre-set connectors 3 on multiple sets of steel trusses 2. Initially fix the steel truss 2 to the floor deck 1 through the connectors 3. Then use the reinforcement 4 to tighten the lower chord 22 of the steel truss 2 for a second time to ensure that the steel truss 2 and the floor deck 1 are firmly connected. S2, connector 3 and reinforcement 4 are stably assembled floor deck 1, which will be hoisted to the designated construction position on the building where the corresponding support system is pre-installed. The construction personnel will longitudinally slide and snap together the adjacent floor deck 1 through the first overlap plate 5 and the second overlap plate 6, and use the positioning buckle 7 and the bayonet to achieve precise docking. Bolts will be driven into the first overlap plate 5 and the second overlap plate 6 to enhance the structural strength. S3. The steel truss 2 is connected by tightening fittings 9 to enhance lateral stability. Finally, bolts are driven into the joint plate 8 and tightened to ensure a stable splicing between the transverse floor deck 1. Finally, concrete is poured into the steel truss 2 on the floor deck 1. After the concrete reaches the specified strength, the support system is removed to complete the floor slab construction.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated steel truss floor deck composite structure, comprising multiple steel trusses (2) assembled in parallel on a floor deck (1), wherein the steel trusses (2) are composed of web members (21), lower chord members (22) and upper chord members (23); Its characteristics are, It also includes multiple connectors (3) spaced apart on both sides of the floor deck (1) edge. The connectors (3) are used to initially connect the floor deck (1) and the steel truss (2) into a whole. Multiple mounting slots are arrayed on the floor deck (1). Reinforcing members (4) for reinforcing the lower chord (22) of the steel truss (2) are provided in the mounting slots of the floor deck (1). The reinforcement component (4) includes a steel sheet (41) and a clamping block (42). The steel sheet (41) is inserted into one side of the mounting groove of the floor deck (1) and passes around the lower chord (22) of the steel truss (2) before exiting from the other side. The clamping block (42) is clamped and locked at the opening of the steel sheet (41). The clamping block (42) consists of an elastic block (421) and a pull ring (422). The elastic block (421) is adapted to and squeezed at the bent opening of the steel sheet (41). The pull ring (422) is fixedly provided on the elastic block (421). The floor deck (1) is fixedly connected to a first overlapping plate (5) on one longitudinal side and to a second overlapping plate (6) on the other longitudinal side. The first overlapping plate (5) and the second overlapping plate (6) are provided with "U"-shaped buckle plates with opposite openings.

2. The prefabricated steel truss floor decking composite structure according to claim 1, characterized in that, The connector (3) includes a force block (31), a hook (32), a rubber pad (34), a lever (35), and a pressure block (36). The force block (31) is provided on the side of the floor deck (1) away from the steel truss (2). The hook (32) is slidably connected through the force block (31). The hook (32) penetrates the body of the floor deck (1) and hooks back to the bottom of the web member (21). The section of the hook (32) that penetrates the force block (31) is a hinge rod (33). The side of the force block (31) away from the hook (32) is provided with a rubber pad (34). The end of the hinge rod (33) slides through the rubber pad (34) and is hinged to a lever (35). The lever (35) is fixedly connected to a pressure block (36) on the rod body near the rubber pad (34). The pressure block (36) and the rubber pad (34) are in contact.

3. The prefabricated steel truss floor decking composite structure according to claim 2, characterized in that, The steel sheet (41) and the clamping block (42) are provided with mating teeth (43) on their two end faces.

4. The prefabricated steel truss floor decking composite structure according to claim 3, characterized in that, The first overlapping plate (5) has a reinforcing rib on the side of the plate opposite to the buckle plate. The reinforcing rib of the first overlapping plate (5) has a "V" shaped groove (51) and the groove (51) of the first overlapping plate (5) can be bent.

5. The prefabricated steel truss floor decking composite structure according to claim 4, characterized in that, A positioning buckle (7) is fixedly installed on the side of the second overlapping plate (6) of the floor deck (1). The "U"-shaped buckle plate end of the first overlapping plate (5) is provided with an extension plate body, and the extension plate body of the first overlapping plate (5) is provided with a buckle for the positioning buckle (7).

6. The prefabricated steel truss floor decking composite structure according to claim 5, characterized in that, A joint plate (8) is fixedly installed on one side of the floor deck (1). The joint plate (8) protrudes from the edge of the floor deck (1). The joint plate (8) is a plate body that is recessed downward in a "V" shape. The other side of the floor deck (1) is provided with a "V" shaped groove that is adapted to the joint plate (8).

7. The prefabricated steel truss floor decking composite structure according to claim 6, characterized in that, A fastening element (9) is provided between adjacent steel truss (2) for fastening. The fastening element (9) includes a main rod (91), a fixed rod (92), a threaded rod (93), a limiting rod (94), and a loosening nut (95). One end of the main rod (91) is vertically fixed to the fixed rod (92). The end of the main rod (91) away from the fixed rod (92) is fixed to the threaded rod (93). The limiting rod (94) is threadedly connected to the threaded rod (93) through the loosening nut (95). The limiting rod (94) and the loosening nut (95) are rotatably engaged.

8. A construction method for a prefabricated steel truss floor deck composite structure, employing the prefabricated steel truss floor deck composite structure as described in claim 7, characterized in that... Includes the following steps: S1. Erect a temporary support frame and arrange the steel truss (2) on the assembly site. Place the floor deck (1) with pre-set connectors (3) on multiple sets of steel trusses (2). Fix the steel truss (2) to the floor deck (1) using the connectors (3). Then use the reinforcement (4) to tighten the lower chord (22) of the steel truss (2) a second time to ensure that the steel truss (2) and the floor deck (1) are firmly connected. S2, the floor deck (1) with the connector (3) and reinforcement (4) is stably assembled. It will be hoisted to the designated construction position on the building where the corresponding support system is pre-installed. The construction personnel will longitudinally slide and snap together the adjacent floor deck (1) with the first lap plate (5) and the second lap plate (6), and use the positioning buckle (7) and the bayonet to achieve precise docking. Bolts will be driven into the first lap plate (5) and the second lap plate (6) to enhance the structural strength. S3. The steel truss (2) is tightened with screws (9) to enhance lateral stability. Finally, bolts are driven into the joint plate (8) and tightened to ensure that the horizontal floor deck (1) can be stably spliced. Finally, concrete is poured into the steel truss (2) on the floor deck (1). After the concrete reaches the specified strength, the support system is removed to complete the floor slab construction.

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