Triangular combined keel truss detachable floor support plate and floor structure thereof
Through the on-site processing and detachable connection of triangular combined keel trusses, the problems of complex production of existing steel bar trusses and the displacement of plastic fasteners are solved, and the effects of simplifying construction, reducing costs and improving efficiency are achieved.
Patent Information
- Application Number
- CN202422620301.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The production process of existing steel bar truss floor bearing plates is complex and has high cost. The wave-type bubbling steel bars require large equipment to bend, and the plastic fasteners are easy to shift, resulting in uneven floor slabs after dismantling the mold, which increases construction cost and low efficiency.
Triangular combined keel truss is used to connect to the steel base by machining the eight-character bent rod on site, and the self-drilling screw with drill bit is combined to achieve removable connection, avoiding bending of large equipment and displacement of plastic fasteners, and the steel base is embedded in concrete to fix it.
The construction process is simplified, costs are reduced, uneven floor slabs are avoided, and construction efficiency and reusability are improved.
Smart Images
Figure CN223269465U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of assembled floor slab construction, in particular to a detachable floor slab with a triangular combined keel truss and a floor structure thereof. Background Art
[0002] A floor deck generally refers to the pressed steel plate that supports the concrete floor, often used in conjunction with a steel truss. The steel truss is factory-fabricated from the load-bearing steel bars in the floor slab. The steel truss is then spot-welded to the top surface of the floor deck, forming a composite load-bearing plate known as a steel truss floor deck. During subsequent floor construction, an additional layer of steel is added to the steel truss of the steel truss floor deck, and the floor concrete is poured integrally to form the floor slab.
[0003] When the floor deck is a removable non-metallic floor deck, it is necessary to fix plastic fasteners on the floor deck with self-tapping screws, clamp the bottom of the steel truss on the plastic fasteners, and then removably fix the steel truss to the floor deck using the plastic fasteners and self-tapping screws. When manufacturing this removable steel truss floor deck, it is necessary to drill holes in the floor deck corresponding to the self-tapping screws, and then assemble the plastic fasteners and steel truss with the floor deck. This type of steel truss floor deck has the following problems:
[0004] 1. The steel trusses need to be prefabricated in the factory. The prefabrication work, including the pre-positioning of the bottom plate punching and the assembly of the steel trusses, requires a special mold for the installation of the steel trusses to be customized and placed on the workbench. The entire construction process is complicated and often requires CNC operation, which is costly.
[0005] Second, to ensure the load-bearing capacity of the steel truss, the existing steel truss consists of one top chord longitudinal bar, two bottom chord longitudinal bars, and two sets of continuously bent corrugated web bars. The corrugated web bars are then fixedly connected to the corresponding two bottom chord longitudinal bars on either side of the top chord longitudinal bar. However, the load-bearing capacity of the floor reinforcement is actually determined by the top and bottom chord longitudinal bars. Therefore, the existing steel truss reinforcement arrangement results in a significant waste of web bars. Furthermore, the corrugated web bars require large-scale production equipment for continuous bending, which is complex and increases the production budget.
[0006] 3. Plastic fasteners are fastened to the lower chord steel bars and are set at single-point intervals along the length of the longitudinal bars. After the concrete is poured, the self-tapping screws will be removed and the floor deck will be removed. The plastic fasteners will remain in the floor slab. Once the single-point plastic fasteners shift on the steel bars during construction, the concrete on the bottom surface of the floor slab will be uneven after the formwork is removed, requiring a secondary ceiling smoothing process, which will increase construction costs and reduce construction efficiency. Utility Model Content
[0007] The purpose of the utility model is to provide a triangular combined keel truss detachable floor deck and its floor structure, to solve the technical problem that the existing bottom template punching pre-positioning needs to be completed on a special mold in the factory, which is complicated and costly to construct; and to solve the problem that the wave-type web members in the form of existing steel trusses need to be continuously bent using large production equipment in the factory, which is a complicated process; and to solve the technical problem that the existing plastic fasteners are single-point fastenings, and once they shift on the steel bars during construction, the concrete on the bottom surface of the floor slab will be uneven after the formwork is removed, requiring a secondary ceiling smoothing treatment.
[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0009] A triangular combined keel truss detachable floor deck comprises a set of triangular combined keel trusses, a floor deck and a detachable connector. The triangular combined keel trusses are arranged in parallel and spaced apart along the transverse direction of the floor deck.
[0010] The triangular composite keel truss consists of a set of triangular keel frames and floor longitudinal reinforcement.
[0011] The triangular keel frame is a plane frame. The vertical plane where the triangular keel frame is located is perpendicular to the longitudinal reinforcement of the floor and is spaced apart along the length direction of the longitudinal reinforcement of the floor. The triangular keel frame includes an eight-shaped bent rod and a section of steel base. The eight-shaped bent rod includes a central top bent section and two oblique limb sections of equal length on both sides. The eight-shaped bent rod is centrally inserted into the steel base. The steel base includes a horizontal bottom plate and a vertical side. The bottom surface of the vertical side is fixedly connected to the top surface of the horizontal bottom plate, and the oblique limb section is fixedly connected to the inner surface of the vertical side.
[0012] The floor longitudinal reinforcement includes one top longitudinal reinforcement and two bottom longitudinal reinforcements. The two bottom longitudinal reinforcements are respectively arranged on the outside of the two eight-shaped bent rods and placed on the top surface of the vertical side. The top longitudinal reinforcement is located on the lower side of the top bent section. The size of the top bent section is adapted to the size of the top surface of the top longitudinal reinforcement. The top surface of the top longitudinal reinforcement is attached to and fixedly connected to the bottom surface of the top bent section. The inner side of the bottom longitudinal reinforcement is fixedly connected to the outer side of its corresponding oblique limb section.
[0013] The bottom surface of the horizontal bottom plate is flat and falls on the top surface of the floor decking plate. The top of the detachable connector passes through the floor decking plate and is embedded in the horizontal bottom plate from the bottom surface of the horizontal bottom plate. The detachable connector connects the horizontal bottom plate and the floor decking plate into one.
[0014] The thickness of the floor decking is 18mm-20mm, and the floor decking is made of wooden formwork, bamboo plywood or plastic board.
[0015] The detachable connector is a self-drilling screw with a drill bit at the tip. The top of the detachable connector passes through the floor deck and is embedded in the horizontal base plate from the bottom surface of the horizontal base plate. The horizontal base plate forms a clamping piece for the detachable connector and is fixedly connected with the self-drilling screw.
[0016] The eight-shaped bending rod is round steel, the top bending section is an arc bend, the bottom surface of the top bending section is an arc-shaped bottom surface, and the curvature of the arc-shaped bottom surface is adapted to the curvature of the top surface of the top longitudinal reinforcement.
[0017] Each triangular combined keel truss includes a non-edge frame and two edge frames. The edge frames are arranged at both ends of the triangular combined keel truss. The top longitudinal reinforcement and the bottom longitudinal reinforcement are of equal length and extend out of the edges of the corresponding edge frames at both ends.
[0018] The steel base is the basic channel steel, including the channel bottom plate and the channel side plates on both sides. The channel bottom plate is the horizontal bottom plate, and the channel side plates are the vertical sides. The channel side plates include connecting channel side plates and auxiliary channel side plates. The bottom longitudinal reinforcement is placed on the top surface of the connecting channel side plates and the auxiliary channel side plates. The oblique limb section is fixedly connected to the inner side of the connecting channel side plates, and the top of the detachable connector is embedded in the channel bottom plate.
[0019] The steel base is a special-shaped channel steel, including a channel bottom plate and channel sides. The channel bottom plate is a horizontal bottom plate, and the channel sides are vertical sides. The channel sides include channel side plates, horizontal bent plates and vertical bent plates. The bottom surface of the channel side plates is fixedly connected to the top surface of the horizontal bottom plate. The top of the channel side plates is vertically bent inward to form a horizontal bent plate, and the end of the horizontal bent plate is bent downward to form a vertical bent plate.
[0020] The bottom longitudinal reinforcement is placed on the top surface of the horizontal bent plate, and a gap is formed between the vertical bent plates on both sides for the insertion of the figure-eight bent rod. The width of the gap is adapted to the diameter of the figure-eight bent rod. The figure-eight bent rod is inserted into the gap and the oblique limb section is fixedly connected to the inner side of the vertical bent plates on both sides. The top of the detachable connector is embedded in the bottom plate of the groove.
[0021] The steel base is an angle steel, including an angle bottom plate and an angle side plate. The angle bottom plate is a horizontal bottom plate, and the angle side plate is a vertical side plate. The bottom longitudinal reinforcement is placed on the top surface of the angle side plate. The oblique limb section is fixedly connected to the inner side of the angle side plate, and the top of the detachable connector is embedded in the angle bottom plate.
[0022] A floor structure comprising a triangular combined keel truss and a detachable floor deck, further comprising floor transverse reinforcements which pass through the triangular combined keel trusses and are fixedly connected to the floor longitudinal reinforcements.
[0023] The floor transverse reinforcement includes top transverse reinforcement and bottom transverse reinforcement. A bottom inner corner is formed between the oblique limb section and the bottom longitudinal reinforcement on the inner side of the oblique limb section. The bottom transverse reinforcement is placed at the bottom inner corner and is fixedly connected to the oblique limb section and the bottom longitudinal reinforcement.
[0024] A top inner corner is formed between the top bending section and the top longitudinal reinforcement on the inner side of the top bending section. The top transverse reinforcement is placed at the top inner corner and is fixedly connected to the top bending section and the top longitudinal reinforcement.
[0025] Alternatively, the top transverse reinforcement is arranged above the center of the two adjacent bottom transverse reinforcements and is fixedly connected to the top longitudinal reinforcement.
[0026] Compared with the prior art, the present invention has the following characteristics and beneficial effects:
[0027] The triangular combined keel truss of the utility model can be processed on site. The S-shaped bending rod is fixedly connected to the steel base to form a stable triangular keel frame. Then the floor longitudinal reinforcement is fixedly connected to the triangular keel frame to form a steel truss. The continuously bent wavy web steel bar is abandoned. The S-shaped bending rod only needs to be bent once on site. No large-scale continuous bending equipment is required. The construction is simple and the budget is saved.
[0028] The triangular composite keel truss and floor deck of this utility model can also be positioned and installed on-site. Simply locate the steel base and set the detachable connector at the steel base, eliminating the need for positioning. The detachable connector uses self-drilling screws with drill bits at their tips embedded in the steel base. The steel base also serves as an anchor for the self-drilling screws, connecting the floor deck to the triangular composite keel truss, making installation simple and convenient.
[0029] The steel base of the utility model is also a part of the triangular combined keel truss. After the floor decking is removed, the steel base has been poured in the concrete to avoid construction displacement. At the same time, the bottom surface of the steel base is flat, which avoids uneven concrete surface on the bottom of the floor after demolding. There is no need to smooth the ceiling, which reduces construction costs and improves construction efficiency.
[0030] The utility model only needs to remove the detachable connecting parts to remove the floor deck. After the floor deck is removed, it can be recycled and reused for the next turnover. The utility model has a reliable structure and a firm connection. Compared with traditional steel truss floor decks, the cost is lower and it is easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The present invention will be further described in detail below with reference to the accompanying drawings.
[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model.
[0033] Figure 2 yes Figure 1 Enlarged view of the foundation channel steel of the middle triangular keel frame.
[0034] Figure 3 yes Figure 1 Schematic diagram of the upward-looking structure.
[0035] Figure 4 yes Figure 1 Schematic diagram of the side structure.
[0036] Figure 5It is a schematic diagram of the three-dimensional structure of the second embodiment of the present utility model.
[0037] Figure 6 yes Figure 5 A partial enlarged view of the middle row of triangular keel frames.
[0038] Figure 7 yes Figure 5 Enlarged view of the special-shaped channel steel of the middle triangular keel frame.
[0039] Figure 8 yes Figure 5 Schematic diagram of the side structure.
[0040] Figure 9 yes Figure 8 A partial enlarged view of .
[0041] Figure 10 It is an enlarged view of the triangular keel frame in the third embodiment of the present invention.
[0042] Figure 11 This is a schematic structural diagram of the floor transverse reinforcements in the floor structure when the first embodiment of the present invention is applied, which are tied up and down.
[0043] Figure 12 yes Figure 11 A partial enlarged view of .
[0044] Figure 13 yes Figure 11 A partially enlarged view from another perspective.
[0045] Figure 14 yes Figure 11 Schematic diagram of the side structure.
[0046] Figure 15 This is a schematic structural diagram of the floor transverse reinforcement in the floor structure when the second embodiment of the present invention is applied.
[0047] Figure 16 It is a structural schematic diagram of the cross-binding of floor transverse reinforcements in a floor structure when the utility model is applied in the first embodiment.
[0048] Figure 17 This is a schematic structural diagram of the cross-binding of floor transverse reinforcements in a floor structure when the second embodiment of the present utility model is applied.
[0049] Figure 18 It is a structural schematic diagram of the floor structure of the utility model after pouring floor concrete.
[0050] Figure 19 This is a schematic diagram of the floor structure after the floor decking is removed.
[0051] Figure numerals: 1-triangular combined keel truss, 2-floor decking, 3-detachable connector, 4-triangular keel frame, 41-eight-shaped bent rod, 411-top bent section, 412-oblique limb section, 42-steel base, 421-horizontal bottom plate, 422-connecting trough side plate, 423-auxiliary trough side plate, 424-trough side plate, 425-horizontal bent plate, 426-vertical bent plate, 427-corner side plate, 4a-non-edge frame, 4b-edge frame, 5-floor longitudinal reinforcement, 51-top longitudinal reinforcement, 52-bottom longitudinal reinforcement, 6-floor transverse reinforcement, 61-top transverse reinforcement, 62-bottom transverse reinforcement, 7-top internal angle, 8-bottom internal angle, 9-floor concrete. DETAILED DESCRIPTION
[0052] Example 1 See Figure 1-4 As shown, a triangular composite keel truss detachable floor deck comprises a triangular composite keel truss 1, a floor deck 2, and detachable connectors 3. The triangular composite keel trusses 1 are arranged parallel to and spaced apart from each other along the floor deck 2. The floor deck 2 has a thickness d of 18 mm to 20 mm and is made of wood formwork, bamboo plywood, or plastic board.
[0053] See also Figure 1 As shown, the triangular composite keel truss 1 comprises a set of triangular keel frames 4 and floor longitudinal reinforcement 5. Each triangular composite keel truss 1 includes a non-edge frame 4a and two edge frames 4b. The edge frames 4b are located at either end of the triangular composite keel truss 1. The top longitudinal reinforcement 51 and the bottom longitudinal reinforcement 52 are of equal length and extend beyond the edges of the corresponding edge frames 4b at both ends. In this embodiment, the non-edge frame 4a is located in the center of the triangular composite keel truss 1.
[0054] See also Figure 1 、 2 As shown in Figure 4, the triangular keel frame 4 is a plane frame. The vertical plane where the triangular keel frame 4 is located is perpendicular to the floor longitudinal reinforcement 5 and is spaced apart along the length direction of the floor longitudinal reinforcement 5. The triangular keel frame 4 includes an S-shaped bending rod 41 and a section of steel base 42. The S-shaped bending rod 41 includes a central top bending section 411 and two oblique limb sections 412 of equal length on both sides. The S-shaped bending rod 41 is centrally inserted into the steel base 42. The steel base 42 includes a horizontal bottom plate 421 and a vertical side. The bottom surface of the vertical side is fixedly connected to the top surface of the horizontal bottom plate, and the oblique limb section 412 is fixedly connected to the inner surface of the vertical side.
[0055] See also Figure 1-4As shown, the floor longitudinal reinforcement 5 includes a top longitudinal reinforcement 51 and two bottom longitudinal reinforcements 52. The two bottom longitudinal reinforcements 52 are respectively arranged on the outside of the two cross-shaped bent rods 41 and placed on the top surface of the vertical side. The top longitudinal reinforcement 51 is located below the top bent section 411. The size of the top bent section 411 is consistent with the size of the top surface of the top longitudinal reinforcement 51. The top surface of the top longitudinal reinforcement 51 is aligned with and fixedly connected to the bottom surface of the top bent section 411. The inner side of the bottom longitudinal reinforcement 52 is fixedly connected to the outer side of its corresponding diagonal limb section 412. The top longitudinal reinforcement 51 and the bottom longitudinal reinforcement 52 are equal in length, and both ends extend beyond the edge of the corresponding side frame 4b.
[0056] See also Figure 1 、 3 As shown in Figure 4, the bottom surface of the horizontal bottom plate 421 is flat and falls on the top surface of the floor decking plate 2. The top of the detachable connecting member 3 passes through the floor decking plate 2 and is embedded in the horizontal bottom plate 421 from the bottom surface of the horizontal bottom plate 421. The detachable connecting member 3 connects the horizontal bottom plate 421 and the floor decking plate 2 as a whole.
[0057] In this embodiment, the removable connector 3 is a self-drilling screw with a drill bit at the tip. Two removable connectors 3 are symmetrically provided on each steel base 42. The top of each removable connector 3 passes through the floor deck 2 and is embedded into the horizontal base plate 421 from its bottom surface. The horizontal base plate 421 forms a clamping member for the removable connector and is fixedly connected to the self-drilling screw.
[0058] See also Figure 4 As shown, in this embodiment, the eight-shaped bending rod 41 can be made of round steel, the top bending section 411 is an arc bend, and the bottom surface of the top bending section 411 is an arc-shaped bottom surface, and the curvature of the arc-shaped bottom surface is adapted to the curvature of the top surface of the top longitudinal rib 51.
[0059] In this embodiment, the steel base 42 is a basic channel steel, including a channel bottom plate and channel side plates on both sides. The channel bottom plate is a horizontal bottom plate 421, and the channel side plates are vertical sides. The channel side plates include a connecting channel side plate 422 and an auxiliary channel side plate 423. The bottom longitudinal reinforcement 52 is placed on the top surface of the connecting channel side plate 422 and the auxiliary channel side plate 423. The oblique limb section 412 is fixedly connected to the inner side of the connecting channel side plate 422, and the top of the detachable connector 3 is embedded in the channel bottom plate.
[0060] The specific dimensions are as follows: the diameter c of the S-shaped bending rod 41 is 5 mm, the angle γ between the oblique limb sections 412 is about 90 degrees, the horizontal distance e between the top longitudinal reinforcement 51 and the bottom longitudinal reinforcement 52 is 100 mm, the vertical distance m is 80 mm, the distance f between the bottom longitudinal reinforcements 52 is 200 mm, the length g of the steel base 42 is 230 mm, the end face distance k between the bottom longitudinal reinforcement 52 and the steel base 42 is 15 mm, and the height h of the steel base 42 is 230 mm, which is also the thickness of the protective layer of the bottom longitudinal reinforcement 52.
[0061] Example 2 See Figure 5-9 As shown, what is different from Example 1 is that the steel base 42 is a special-shaped channel steel, including a channel bottom plate and channel sides on both sides, the channel bottom plate is a horizontal bottom plate 421, the channel sides are vertical side parts, the channel sides include channel side plates 424, horizontal bent plates 425 and vertical bent plates 426, the bottom surface of the channel side plates 424 is fixedly connected to the top surface of the horizontal bottom plate, the top of the channel side plates 424 is vertically bent inward to form a horizontal bent plate 425, and the end of the horizontal bent plate 425 is bent downward to form a vertical bent plate 426.
[0062] The bottom longitudinal reinforcement 52 rests on the top surface of the horizontal bent plate 425. A gap is formed between the vertical bent plates 426 on either side for the insertion of the splayed bent rod 41. The width of the gap matches the diameter of the splayed bent rod 41. The splayed bent rod 41 is inserted into the gap, and the oblique limb section 412 is fixedly connected to the inner sides of the vertical bent plates 426 on both sides. The top of the detachable connector 3 is embedded in the bottom plate of the groove. The gap formed by the vertical bent plates 426 on both sides provides positioning for the subsequent installation and insertion of the splayed bent rod 41, eliminating the need to position the splayed bent rod 41 during actual construction and prefabrication.
[0063] Example 3 See Figure 10 As shown, different from the first embodiment, the steel base is an angle steel, including an angle bottom plate and an angle side plate 427. The angle bottom plate is a horizontal bottom plate 421, and the angle side plate 427 is a vertical side. The bottom longitudinal reinforcement 52 falls on the top surface of the angle side plate 427, the oblique limb section 412 is fixedly connected to the inner side of the angle side plate 427, and the top of the detachable connecting member 3 is embedded in the angle bottom plate.
[0064] See also Figure 11-15 As shown, the floor structure including the detachable floor deck of the triangular combined keel truss also includes floor transverse reinforcement 6, which runs through each triangular combined keel truss 1 and is fixedly connected to the floor longitudinal reinforcement 5.
[0065] The floor transverse reinforcement 6 includes a top transverse reinforcement 61 and a bottom transverse reinforcement 62. A bottom inner corner 8 is formed between the oblique limb section 412 and the bottom longitudinal reinforcement 52 on the inner side of the oblique limb section 412. The bottom transverse reinforcement 62 is placed at the position of the bottom inner corner 8 and is fixedly connected to both the oblique limb section 412 and the bottom longitudinal reinforcement 52.
[0066] A top inner corner 7 is formed between the top bending section 411 and the top longitudinal rib 51 on the inner side of the top bending section 411 . The top transverse rib 61 is placed at the position of the top inner corner 7 and is fixedly connected to both the top bending section 411 and the top longitudinal rib 51 .
[0067] See also Figure 16-17As shown, or in other embodiments, the top transverse reinforcement 61 is arranged above the center of two adjacent bottom transverse reinforcements 62 and is fixedly connected to the top longitudinal reinforcement 51. In actual construction, the upper reinforcement may be staggered and tied. After such arrangement, the crisscross and cross-sections form a triangular structure, making the floor structure more solid and stable.
[0068] The fixed connections in the present invention are all welded connections.
[0069] The construction process of this utility model is as follows:
[0070] Step 1: Design the spacing of the triangular composite keel trusses 1 and the size of the triangular keel frame 4 according to the size of the floor deck 2 and the floor longitudinal reinforcement 5;
[0071] Step 2: According to the design, the round steel is bent on site to form an S-shaped bending rod 41, and then the S-shaped bending rod 41 is welded to the steel base 42 to form a triangular keel frame 4;
[0072] Step 3: Weld the floor longitudinal reinforcement 5 to the triangular keel frame 4 to form a triangular combined keel truss 1;
[0073] Step 4: Place the triangular composite keel truss 1 on the floor deck 2, and then connect the triangular composite keel truss 1 to the floor deck 2 through the detachable connector 3;
[0074] Step 5: Pass the floor transverse reinforcement 6 through each triangular combined keel truss 1, and then weld the floor transverse reinforcement 6 to the floor longitudinal reinforcement 5 to form the floor structure;
[0075] Step 6, see Figure 18 As shown, the floor concrete 9 is poured on the completed floor structure to form the floor; the height of the floor concrete 9 is H=130mm;
[0076] Step 7, see Figure 19 As shown, the detachable connector 3 is dismantled and the floor decking 2 is removed. After the floor decking 2 is dismantled, it can be recycled and reused for the next turnover.
[0077] The above installation sequence ensures the firmness of the entire floor deck system and the detachability of the floor deck.
Claims
1. A triangular combined keel truss detachable floor deck, characterized by: The invention comprises a set of triangular combined keel trusses (1), a floor deck (2) and a detachable connecting piece (3), wherein the triangular combined keel trusses (1) are arranged in parallel and spaced relation along the floor deck (2). The triangular composite keel truss (1) comprises a set of triangular keel frames (4) and floor longitudinal reinforcement (5). The triangular keel frame (4) is a plane frame. The vertical plane where the triangular keel frame (4) is located is perpendicular to the floor longitudinal reinforcement (5) and is spaced apart along the length direction of the floor longitudinal reinforcement (5). The triangular keel frame (4) includes an eight-shaped bending rod (41) and a section of steel base (42). The eight-shaped bending rod (41) includes a central top bending section (411) and two oblique limb sections (412) of equal length on both sides. The eight-shaped bending rod (41) is centrally inserted into the steel base (42). The steel base (42) includes a horizontal bottom plate (421) and a vertical side portion. The bottom surface of the vertical side portion is fixedly connected to the top surface of the horizontal bottom plate. One side of the oblique limb section (412) is fixedly connected to the inner surface of the vertical side portion. The floor longitudinal reinforcement (5) includes a top longitudinal reinforcement (51) and two bottom longitudinal reinforcements (52). The two bottom longitudinal reinforcements (52) are respectively arranged on the outside of the two eight-shaped bending rods (41) and placed on the top surface of the vertical side. The top longitudinal reinforcement (51) is located on the lower side of the top bending section (411). The size of the top bending section (411) is adapted to the size of the top surface of the top longitudinal reinforcement (51). The top surface of the top longitudinal reinforcement (51) is attached to and fixedly connected to the bottom surface of the top bending section (411). The inner side of the bottom longitudinal reinforcement (52) is fixedly connected to the outer side of its corresponding oblique limb section (412). The bottom surface of the horizontal bottom plate (421) is flat and rests on the top surface of the floor decking plate (2). The top of the detachable connecting member (3) passes through the floor decking plate (2) and is embedded into the horizontal bottom plate (421) from the bottom surface of the horizontal bottom plate (421). The detachable connecting member (3) connects the horizontal bottom plate (421) and the floor decking plate (2) into one body.
2. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: The thickness of the floor decking (2) is 18mm-20mm, and the floor decking (2) is a wooden formwork, a bamboo plywood or a plastic board.
3. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: The detachable connecting member (3) is a self-drilling screw with a drill bit at the tip. The top of the detachable connecting member (3) passes through the floor deck (2) and is embedded into the horizontal bottom plate (421) from the bottom surface of the horizontal bottom plate (421). The horizontal bottom plate (421) forms a clamping member of the detachable connecting member and is fixedly connected to the self-drilling screw.
4. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: The eight-shaped bending rod (41) is a round steel, the top bending section (411) is an arc bending, the bottom surface of the top bending section (411) is an arc bottom surface, and the curvature of the arc bottom surface is adapted to the curvature of the top surface of the top longitudinal reinforcement (51).
5. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: Each triangular combined keel truss (1) comprises a non-edge frame (4a) and two edge frames (4b), the edge frames (4b) being arranged at both ends of the triangular combined keel truss (1), the top longitudinal reinforcement (51) and the bottom longitudinal reinforcement (52) being of equal length and extending out of the edges of the corresponding edge frames (4b) at both ends.
6. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: The steel base (42) is a basic channel steel, including a channel bottom plate and channel side plates on both sides, the channel bottom plate is a horizontal bottom plate (421), the channel side plates are vertical side parts, the channel side plates include a connecting channel side plate (422) and an auxiliary channel side plate (423), the bottom longitudinal reinforcement (52) falls on the top surface of the connecting channel side plate (422) and the auxiliary channel side plate (423), the oblique limb section (412) is fixedly connected to the inner side of the connecting channel side plate (422), and the top of the detachable connector (3) is embedded in the channel bottom plate.
7. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: The steel base (42) is a special-shaped channel steel, including a channel bottom plate and channel sides. The channel bottom plate is a horizontal bottom plate (421), and the channel sides are vertical sides. The channel sides include channel side plates (424), horizontal bent plates (425) and vertical bent plates (426). The bottom surface of the channel side plates (424) is fixedly connected to the top surface of the horizontal bottom plate. The top of the channel side plates (424) is vertically bent inward to form a horizontal bent plate (425). The end of the horizontal bent plate (425) is bent downward to form a vertical bent plate (426). The bottom longitudinal rib (52) is placed on the top surface of the horizontal bent plate (425), and a gap is formed between the vertical bent plates (426) on both sides for the insertion of the eight-shaped bent rod (41). The width of the gap is adapted to the diameter of the eight-shaped bent rod (41). The eight-shaped bent rod (41) is inserted into the gap and the oblique limb section (412) is fixedly connected to the inner side of the vertical bent plates (426) on both sides. The top of the detachable connector (3) is embedded in the bottom plate of the groove.
8. The triangular combined keel truss detachable floor deck according to claim 1, characterized in that: The steel base is an angle steel, comprising an angle bottom plate and an angle side plate (427), wherein the angle bottom plate is a horizontal bottom plate (421), the angle side plate (427) is a vertical side portion, the bottom longitudinal reinforcement (52) is placed on the top surface of the angle side plate (427), the oblique limb section (412) is fixedly connected to the inner side of the angle side plate (427), and the top of the detachable connector (3) is embedded in the angle bottom plate.
9. A floor structure comprising a detachable floor deck of a triangular combined keel truss according to any one of claims 1 to 8, characterized in that: It also includes floor transverse reinforcement (6), which runs through each triangular combined keel truss (1) and is fixedly connected to the floor longitudinal reinforcement (5).
10. The floor structure according to claim 9, characterized in that: The floor transverse reinforcement (6) includes a top transverse reinforcement (61) and a bottom transverse reinforcement (62). A bottom inner corner (8) is formed between the oblique limb section (412) and the bottom longitudinal reinforcement (52) on the inner side of the oblique limb section (412). The bottom transverse reinforcement (62) is placed at the bottom inner corner (8) and is fixedly connected to both the oblique limb section (412) and the bottom longitudinal reinforcement (52). A top inner corner (7) is formed between the top bending section (411) and the top longitudinal rib (51) on the inner side of the top bending section (411). The top transverse rib (61) is placed at the top inner corner (7) and is fixedly connected to the top bending section (411) and the top longitudinal rib (51). Alternatively, the top transverse reinforcement (61) is arranged above the center of two adjacent bottom transverse reinforcements (62) and is fixedly connected to the top longitudinal reinforcement (51).