Composite floor slab

Abstract

The invention relates to a composite floor slab, and relates to the technical field of fabricated buildings. The reinforcing structure comprises a bottom plate and further comprises a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are arranged on the bottom plate. The bottom plate is further connected with a steel bar truss, and the end, away from the bottom plate, of the steel bar truss is used for being connected with the first reinforcing rib or the second reinforcing rib. The composite floor slab has the effect of improving the overall bending strength of the composite floor slab.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated building technology, in particular to a composite floor slab. Background Art

[0002] Prefabricated buildings are buildings that are assembled mechanically at the construction site using factory-prefabricated components and accessories. They have the advantages of good quality, high efficiency, and fast construction, which improves construction efficiency and reduces environmental pollution at the construction site. As the main component of prefabricated buildings, composite floor slabs have the characteristics of saving materials, convenient and fast construction, and green environmental protection.

[0003] The composite floor is an assembled integral floor composed of a base plate and a cast-in-place reinforced concrete layer. The base plate is not only one of the components of the floor structure, but also a permanent formwork for the cast-in-place reinforced concrete superimposed layer. In the actual preparation process, the base plate is placed in a prefabricated mold, and then steel bars are embedded in the mold, and then concrete is poured into the mold. After the concrete is formed, the composite floor composed of the base plate and the cast-in-place reinforced concrete can be removed from the mold to achieve demoulding and complete the preparation.

[0004] However, the existing composite floor slabs have the disadvantage of insufficient overall bending rigidity, which makes the composite floor slabs easy to be damaged and has a short service life, so there is room for improvement. Summary of the invention

[0005] In order to improve the overall bending stiffness of a composite floor slab, the present application provides a composite floor slab.

[0006] The composite floor slab provided in this application adopts the following technical solution: A composite floor comprises a base plate, and also comprises a first reinforcing rib and a second reinforcing rib, wherein the first reinforcing rib and the second reinforcing rib are arranged on the base plate; a steel truss is also connected to the base plate, and an end of the steel truss away from the base plate is used to be connected to the first reinforcing rib or the second reinforcing rib.

[0007] By adopting the above-mentioned technical scheme, the first reinforcing rib and the second reinforcing rib are arranged to improve the rigidity of the composite floor slab of the present application, and realize the formwork-free and support-free state, and the first reinforcing rib and / or the second reinforcing rib are connected by the steel truss to improve the crack resistance and bending resistance of the composite floor slab of the present application, and improve the overall economy of the composite floor slab of the present application, and finally form a composite floor slab.

[0008] Preferably, the first reinforcing ribs include transverse ribs and longitudinal ribs, and the transverse ribs and longitudinal ribs are staggered on the bottom plate along different directions of the bottom plate; the second reinforcing ribs include long ribs and short ribs, and the long ribs and short ribs are distributed on the bottom plate at intervals.

[0009] By adopting the above technical solution, the first reinforcing ribs include transverse ribs and longitudinal ribs, and the transverse ribs and the longitudinal ribs are staggered to be used for arranging ribs in different directions of the bottom plate, and the second reinforcing ribs include long ribs and short ribs, and the long ribs and the short ribs are distributed at intervals to be used for arranging ribs of different lengths on the bottom plate, that is, the first reinforcing ribs and the second reinforcing ribs are further limited from two aspects of the rib distribution position and the rib length, thereby optimizing the reinforcing effect of the first reinforcing ribs and the second reinforcing ribs on the structural strength of the bottom plate.

[0010] Preferably, the steel truss includes triangular bars and connecting bars; the triangular bars are arranged on the base plate, and there are several triangular bars, and several triangular bars on the same straight line are connected to the same connecting bar; the end of the triangular bar away from the base plate is connected to the second reinforcing rib, or is connected to the first reinforcing rib and the second reinforcing rib at the same time.

[0011] By adopting the above-mentioned technical scheme, the present application utilizes triangular bars, a reinforcing steel bar with a stable structure, as embedded steel bars, so that the composite floor slab finally formed has better crack resistance and bending resistance; and utilizes triangular bars to connect the first reinforcing rib and / or the second reinforcing rib to improve the connection strength and stability between the bottom plate and the first reinforcing rib and the second reinforcing rib.

[0012] Preferably, it also includes high-strength steel bars, the ends of which are provided with anchors, the anchors include clamping plates and locking members, the locking members include anchor plates and locking bolts; there are multiple clamping plates, which are distributed on the peripheral walls of the high-strength steel bars along the circumference of the high-strength steel bars, the locking members are used to abut the clamping plates against the peripheral walls of the high-strength steel bars, the anchor plates include two symmetrically arranged support plates, and the end of one of the support plates is inserted into the end of the other support plate, and the ends of the two support plates that are inserted into each other are provided with threaded holes for threaded connection of the locking bolts.

[0013] By adopting the above technical scheme, the arrangement of high-strength steel bars can further enhance the overall structural strength and bending resistance of the composite floor slab of the present application; the clamping plate is attached to the peripheral wall of the high-strength steel bars, and then the support plate included in the anchor plate is covered on the surface of the clamping plate, and it is ensured that the two support plate ends belonging to the same anchor plate are plugged into each other, and finally, the locking bolts are threadedly connected to the threaded holes at the plug-in parts of the support plate ends, so as to realize the fixed splicing of the two support plates belonging to the same anchor plate through the locking bolts, and the fixed splicing of the anchor plate can make the clamping plate fixedly clamped on the surface of the high-strength steel bars, and finally the clamping of the high-strength steel bars by the clamping plate is established, and the friction between the clamping plate and the high-strength steel bars is used to realize the anchoring of the high-strength steel bars.

[0014] Preferably, there are two anchor plates, one of which is a fixed plate and the other is a movable plate, the fixed plate is fixedly connected to the clamping plate, and the movable plate rotates on the clamping plate along the circumferential direction of the support plate; the threaded hole is provided on the fixed plate, and the ends of the two support plates included in the movable plate that are plugged into each other are provided with docking holes for inserting locking bolts; When the locking bolt is inserted into the docking hole, the positions where the two support plates included in the movable plate are plugged into each other and the positions where the clamping plates are spliced ​​together are not on the same straight line.

[0015] By adopting the above technical solution, before using the locking bolts to fix the fixed plate and the movable plate to the periphery of the clamping plate, the movable plate is rotated so that the straight line connecting the docking hole and the threaded hole is parallel to the axial direction of the high-strength steel bar, so that the locking bolt can be connected to the threaded hole and the docking hole at the same time, and the operation of rotating the movable plate can also make the positions where the two support plates included in the movable plate are plugged into each other and the positions where the clamping plates are spliced ​​together not be on the same straight line, that is, before using the locking bolts to fix, the movable plate is used to enable all the clamping plates to be relatively stably enclosed around the periphery of the high-strength steel bar, thereby reducing the situation where the clamping plates are scattered and inconvenient to fix.

[0016] Preferably, a clearance hole is formed through the side wall of the clamping plate near the movable plate, and an abutment strip is arranged in the clearance hole. The middle part of the abutment strip is hinged to the inner wall of the clearance hole, one end of the abutment strip is a linkage end, and the other end is an abutment end; the side wall of the movable plate facing the clamping plate is provided with a linkage block for inserting into the clearance hole, and the linkage end of the abutment strip is located on the rotation path of the linkage block when the movable plate rotates relative to the clamping plate; and when the movable plate is rotated so that the straight line connecting the docking hole and the threaded hole is parallel to the length direction of the clamping plate, the abutment end of the abutment strip is located outside the clearance hole and on the side of the clamping plate away from the movable plate.

[0017] By adopting the above technical scheme, when the clamping plate is installed on the periphery of the high-strength steel bar, the clamping plate abuts against the peripheral wall of the high-strength steel bar. At this time, the locking bolt is used to fix the abutment of the clamping plate against the high-strength steel bar. In combination with the above scheme, it can be seen that before the locking bolt is inserted into the docking hole, the movable plate needs to be rotated, and the movable plate will drive the abutment bar to rotate during the rotation process. Therefore, when the movable plate is rotated into place, the locking bolt can be inserted into the threaded hole and the docking hole at the same time. At this time, the abutment end of the abutment bar will rotate out of the clearance hole and be located on the side of the clamping plate away from the movable plate, that is, it is rotated to abut against the peripheral wall of the high-strength steel bar, thereby strengthening the abutment and anchoring force of the high-strength steel bar.

[0018] Preferably, the movable plate is slidably connected to the clamping plate along the length direction of the clamping plate, and a plurality of deformable abutment plates are provided at one end of the clamping plate close to the movable plate, the abutment plates are distributed circumferentially along the high-strength steel bar on the periphery, and the abutment plates are located on the side of the movable plate away from the fixed plate. When the end of the locking bolt is inserted into the docking hole and the locking bolt is rotated and approaches the movable plate, the movable plate moves relative to the axial direction of the high-strength steel bar and abuts against the abutment plate, and the abutment plate is used to abut against the surface of the high-strength steel bar when pressed by the movable plate.

[0019] By adopting the above-mentioned technical scheme, the present application further divides the anchor plate into a fixed plate and a movable plate. As the name implies, the fixed plate is fixedly connected to the support plate, and the movable plate can slide along the length direction of the support plate. The driving source for driving the movable plate to slide is to insert the locking bolt into the docking hole, and then further screw the locking bolt. The locking bolt pushes the movable plate to make the movable plate slide relative to the support plate. The present application also provides an abutment plate in the sliding direction of the movable plate. When the movable plate contacts the abutment plate, the abutment plate will be pressed against the surface of the high-strength steel bar, thereby further optimizing the anchoring effect on the high-strength steel bar.

[0020] Preferably, the movable plate is slidably connected to the clamping plate along the length direction of the clamping plate, a plurality of clamping blocks are inserted through the side walls of the clamping plate, the clamping blocks are slidably connected to the clamping plate along a direction parallel to the radial direction of the high-strength steel bars, and a variable spiral rib is commonly connected between the clamping block and the clamping plate, and the deformation direction of the spiral rib is parallel to the sliding direction of the clamping block relative to the clamping plate; the clamping block is located on the sliding path of the movable plate relative to the clamping plate, and the clamping block is used to move toward the direction close to the high-strength steel bars and press against the surface of the high-strength steel bars when it is resisted by the movable plate.

[0021] By adopting the above technical solution, during the sliding of the movable plate relative to the support plate, a clamping block is further arranged on the sliding path of the movable plate, and the abutting positions of the abutting block and the high-strength steel bars are limited not to overlap with each other, thereby realizing multi-point anchoring of the high-strength steel bars and further enhancing the anchoring effect of the high-strength steel bars.

[0022] Preferably, a plurality of anchor holes are formed on the side wall of the fixing plate, and among all the anchor holes there is an anchor hole connected to the threaded hole.

[0023] By adopting the above technical solution, the provision of anchor holes can increase the contact area between the anchor plate and the subsequently poured reinforced concrete, thereby enhancing the connection strength and adhesion between the high-strength steel bars and the concrete. In addition, the presence of an anchor hole connected to the threaded hole is limited. This limited condition enables the subsequently poured concrete to flow into the threaded hole through the anchor hole, so as to strengthen the connection tightness and strength between the locking bolt and the clamping plate through the concrete, thereby optimizing the locking firmness of the locking bolt to the anchor plate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: The first reinforcing rib and the second reinforcing rib are provided to improve the rigidity of the composite floor slab of the present application, and realize formwork-free and support-free. The first reinforcing rib and / or the second reinforcing rib are connected by a steel bar truss, and high-strength steel bars are added at the same time to improve the crack resistance and bending resistance of the composite floor slab of the present application, and improve the overall economy of the composite floor slab of the present application, and finally form a composite floor slab; Additional anchors are added to avoid the problem of stress relaxation of high-strength steel bars. At the same time, anchors are used to strengthen the connection adhesion and connection strength between high-strength steel bars and post-cast concrete, further optimizing the overall bending and crack resistance of the composite floor slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a composite floor disclosed in Example 1 of the present application.

[0026] Figure 2 It is a schematic diagram of Example 1 of the present application for illustrating the distribution position of the first reinforcing rib on the bottom plate.

[0027] Figure 3 It is a schematic diagram of the steel truss structure used in Example 1 of the present application.

[0028] Figure 4 yes Figure 1 Sectional view along AA direction.

[0029] Figure 5 It is a schematic diagram of the anchor structure used in Example 1 of the present application.

[0030] Figure 6 It is a schematic diagram of Example 1 of the present application for illustrating the positional relationship between the abutment sheet and the movable plate.

[0031] Figure 7 yes Figure 6 Cross-sectional view along the BB axis.

[0032] Figure 8 It is a schematic diagram used to illustrate the structure of the anchor in Example 2.

[0033] Explanation of the reference numerals in the accompanying drawings: 1. bottom plate; 11. connecting rib plate; 12. telescopic slide plate; 121. mounting hole; 2. first reinforcing rib; 21. transverse rib; 22. longitudinal rib; 3. second reinforcing rib; 31. long rib; 32. short rib; 4. steel truss; 41. triangular rib; 42. connecting rib; 6. high-strength steel bar; 7. anchor; 71. clamping plate; 711. clearance hole; 712. abutment strip; 713. abutment sheet; 714. tightening block; 715. spiral rib; 72. locking piece; 721. anchor plate; 722. locking bolt; 7211. fixed plate; 7212. movable plate; 7213. support plate; 7214. threaded hole; 7215. docking hole; 7216. linkage block; 73. anchor hole; 8. hollow foam board. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-8 This application is described in further detail. Example

[0035] Embodiment 1 of the present application discloses a composite floor. Figure 1 The composite floor comprises a bottom plate 1 and a first reinforcing rib 2 arranged on one side of the bottom plate 1 and a second reinforcing rib 3 on the other side. The first reinforcing rib 2 comprises a transverse rib 21 and a longitudinal rib 22. The transverse rib 21 is arranged along the width direction of the bottom plate 1, and the longitudinal rib 22 is arranged along the length direction of the bottom plate 1; the second reinforcing rib 3 is arranged along the length direction of the bottom plate 1, and the second reinforcing rib 3 comprises a long rib 31 and a short rib 32. The long rib 31 and the short rib 32 are distributed on the bottom plate 1 at intervals.

[0036] Reference Figure 3 and Figure 4 , and also includes a steel truss 4, the steel truss 4 includes a triangular rib 41 and a connecting rib 42, the connecting rib 42 is arranged along the length direction of the bottom plate 1, and the connecting rib 42 is adjacent to multiple triangular ribs 41 in the length direction, the top of the triangular rib 41 is connected to the second reinforcing rib 3, and the bottom of the triangular rib 41 is connected to the bottom plate 1 or penetrates the bottom plate 1 and is connected to the first reinforcing rib 2; in the actual production process, the triangular rib 41 and the second reinforcing rib are prefabricated to form Figure 3 The whole is then placed on a preset formwork platform, and concrete is poured into the formwork platform to form a first reinforcing rib 2 connected to the bottom plate 1 and the steel truss 4, that is, a first reinforcing rib 2 is formed. Figure 4 The shown figure shows an integral prefabricated floor structure with a bottom plate 1 , a first reinforcing rib 2 and a second reinforcing rib 3 .

[0037] Reference Figure 4 , Figure 5 and Figure 6, and also includes a high-strength steel bar 6, an anchor 7 is provided at the end of the high-strength steel bar 6, and the anchor 7 includes a clamping plate 71 and a locking member 72, and the locking member 72 includes an anchor plate 721 and a locking bolt 722. There are a plurality of clamping plates 71, and two clamping plates 71 are assembled to form an annular structure and can be sleeved and attached to the peripheral wall of the high-strength steel bar 6. The locking member 72 is used to fix the clamping plate 71 on the peripheral wall of the high-strength steel bar 6. Specifically, the anchor plate 721 is divided into a fixed plate 7211 and a movable plate 7212. The fixed plate 7211 is fixedly connected to the clamping plate 71 relative to the clamping plate 71, and the movable plate 7212 can slide relative to the axial direction of the clamping plate 71, and can also rotate relative to the clamping plate 71 in the circumferential direction.

[0038] Reference Figure 5 and Figure 6 The fixed plate 7211 and the movable plate 7212 respectively include two support plates 7213 with semicircular cross-sections, one of which is provided with a protrusion at the end thereof that can be inserted into the end wall of the other support plate 7213, the protrusion on the fixed plate 7211 is provided with a threaded hole 7214 for the locking bolt 722 to be threadedly connected, and the protrusion on the movable plate 7212 is provided with a docking hole 7215 for the locking bolt 722 to be inserted, and the docking hole 7215 is a round hole with a smooth inner wall. A plurality of anchor holes 73 are also provided through the side walls of the fixed plate 7211 and the movable plate 7212, and there is an anchor hole 73 in all the anchor holes 73 that is connected to the threaded hole 7214.

[0039] It should be noted that after the two support plates 7213 of the movable plate 7212 of the present application are assembled with each other and before the locking bolt 722 is fixed, the straight line connecting the assembly points of the two support plates 7213 of the movable plate 7212 and the assembly points of the two support plates 7213 of the fixed plate 7211 is parallel to the axial direction of the high-strength steel bar 6. However, when the locking bolt 722 is threadedly inserted into the threaded hole 7214, the docking hole 7215 is not in the length direction of the locking bolt 722, that is, the locking bolt 722 cannot be inserted into the threaded hole 7214. Therefore, in order to enable the locking bolt 722 to be inserted into the docking hole 7215, the installer can rotate the movable plate 7212 along the circumference of the clamping plate 71 so that the docking hole 7215 is located in the length direction of the locking bolt 722. Accordingly, when the locking bolt 722 is inserted into the threaded hole 7214 and the docking hole 7215 at the same time, the straight line connecting the splicing points of the two support plates 7213 of the movable plate 7212 and the splicing points of the two support plates 7213 of the fixed plate 7211 is not parallel to the axial direction of the high-strength steel bar 6.

[0040] Reference Figure 6 and Figure 7A clearance hole 711 is formed through the side wall of the clamping plate 71 near the movable plate 7212, and a contact strip 712 is provided in the clearance hole 711. The middle part of the contact strip 712 is hinged to the inner wall of the clearance hole 711, and a torsion spring is sleeved at the hinge center; one end of the contact strip 712 is a linkage end, and the other end is an abutment end. A linkage block 7216 for inserting into the clearance hole 711 is provided on the side wall of the movable plate 7212 facing the clamping plate 71, and when the torsion spring is not deformed, the linkage end of the contact strip 712 is located at the linkage block 7216. As the movable plate 7212 rotates relative to the clamping plate 71, and when the movable plate 7212 rotates so that the straight line connecting the docking hole 7215 and the threaded hole 7214 is parallel to the length direction of the clamping plate 71, the abutment end of the abutment bar 712 is located inside the clearance hole 711 and on the side of the clamping plate 71 away from the movable plate 7212. At this time, if the clamping plate 71 is sleeved on the outer periphery of the high-strength steel bar 6, then the abutment end of the abutment bar 712 abuts against the surface of the high-strength steel bar 6, thereby increasing the anchoring point for the high-strength steel bar 6.

[0041] Reference Figure 5 and Figure 6 , a plurality of deformable contact pieces 713 are provided at one end of the clamping plate 71 near the movable plate 7212, and the contact pieces 713 are distributed around the high-strength steel bar 6 along the circumferential direction of the high-strength steel bar 6, and the contact pieces 713 are located on the side of the movable plate 7212 away from the fixed plate 7211; when the contact pieces 713 are not deformed, the contact pieces 713 are located on the moving path of the movable plate 7212 moving along the circumferential direction of the high-strength steel bar 6. After the end of the locking bolt 722 is inserted into the docking hole 7215, the locking bolt 722 is continuously screwed so that the locking bolt 722 moves toward the direction close to the movable plate 7212, and at this time, the end of the locking bolt 722 pushes against the inner wall of the docking hole 7215, so that the movable plate 7212 moves relative to the axial direction of the high-strength steel bar 6 and contacts the contact pieces 713, so that the contact pieces 713 are deformed toward the direction close to the high-strength steel bar 6 and contact the surface of the high-strength steel bar 6. In addition, a hollow foam board 8 is provided at one end of the movable plate 7212 away from the fixed plate 7211, and the hollow foam board 8 is sleeved on the periphery of the end of the high-strength steel bar 6 for filling and protection; a spiral steel bar is provided on the side of the fixed plate 7211 away from the movable plate 7212, and the spiral steel bar is sleeved on the periphery of the clamping plate 71, and the end of the spiral steel bar is fixedly connected to the side wall of the fixed plate 7211. Example

[0042] The difference between Example 2 of the present application and Example 1 is that: Figure 8The movable plate 7212 is connected to the clamping plate 71 by sliding along the length direction of the clamping plate 71. A plurality of abutting blocks 714 are inserted through the side wall of the clamping plate 71. The abutting blocks 714 are connected to the clamping plate 71 by sliding along the direction parallel to the radial direction of the high-strength steel bar 6. A variable spiral rib 715 is connected between the abutting blocks 714 and the clamping plate 71. The deformation direction of the spiral rib 715 is parallel to the sliding direction of the abutting blocks 714 relative to the clamping plate 71. The abutting blocks 714 are located on the sliding path when the movable plate 7212 slides along the axial direction of the clamping plate 71. The abutting blocks 714 are used to move toward the direction close to the high-strength steel bar 6 and penetrate the clamping plate 71 to finally press against the surface of the high-strength steel bar 6 when being resisted by the movable plate 7212.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A composite floor, comprising a bottom plate (1), characterized in that: It also comprises a first reinforcing rib (2) and a second reinforcing rib (3), wherein the first reinforcing rib (2) and the second reinforcing rib (3) are arranged on the bottom plate (1); a steel truss (4) is also connected to the bottom plate (1), and one end of the steel truss (4) away from the bottom plate (1) is used to be connected to the first reinforcing rib (2) or the second reinforcing rib (3).

2. The composite floor slab according to claim 1, characterized in that: The first reinforcing ribs (2) include transverse ribs (21) and longitudinal ribs (22), and the transverse ribs (21) and longitudinal ribs (22) are staggeredly arranged on the bottom plate (1) along different directions of the bottom plate (1); the second reinforcing ribs (3) include long ribs (31) and short ribs (32), and the long ribs (31) and short ribs (32) are distributed on the bottom plate (1) at intervals.

3. The composite floor slab according to claim 1, characterized in that: The steel bar truss (4) comprises triangular bars (41) and connecting bars (42); the triangular bars (41) are arranged on the bottom plate (1), and there are a plurality of triangular bars (41), and a plurality of triangular bars (41) on the same straight line are connected to the same connecting bar (42); the end of the triangular bars (41) away from the bottom plate (1) is connected to the second reinforcing rib (3), or is simultaneously connected to the first reinforcing rib (2) and the second reinforcing rib (3).

4. The composite floor slab according to claim 1, characterized in that: It also includes a high-strength steel bar (6), the end of which is provided with an anchor (7), the anchor (7) including a clamping plate (71) and a locking member (72), the locking member (72) including an anchor plate (721) and a locking bolt (722); the clamping plates (71) are multiple and are distributed on the peripheral wall of the high-strength steel bar (6) along the circumferential direction of the high-strength steel bar (6), the locking member (72) is used to abut the clamping plate (71) against the peripheral wall of the high-strength steel bar (6), the anchor plate (721) includes two symmetrically arranged support plates (7213), the end of one support plate (7213) is inserted into the end of the other support plate (7213), and the ends of the two support plates (7213) inserted into each other are provided with threaded holes (7214) for threaded connection of the locking bolt (722).

5. The composite floor slab according to claim 4, characterized in that: There are two anchoring plates (721), one of which is a fixed plate (7211) and the other is a movable plate (7212); the fixed plate (7211) is fixedly connected to the clamping plate (71), and the movable plate (7212) rotates on the clamping plate (71) along the circumferential direction of the support plate; the threaded hole (7214) is provided on the fixed plate (7211), and the mutually plugged ends of the two support plates (7213) included in the movable plate (7212) are provided with a docking hole (7215) for inserting a locking bolt (722); When the locking bolt (722) is inserted into the docking hole (7215), the positions where the two support plates (7213) included in the movable plate (7212) are plugged into each other are not on the same straight line as the positions where the clamping plates (71) are spliced ​​together.

6. The composite floor slab according to claim 5, characterized in that: A clearance hole (711) is formed through the side wall of the clamping plate (71) near the movable plate (7212), and a contact strip (712) is arranged in the clearance hole (711). The middle part of the contact strip (712) is hinged to the inner wall of the clearance hole (711), and one end of the contact strip (712) is a linkage end, and the other end is an abutment end; a linkage block (7216) for inserting into the clearance hole (711) is provided on the side wall of the movable plate (7212) facing the clamping plate (71), and The linkage end of the abutment strip (712) is located on the rotation path of the linkage block (7216) when the movable plate (7212) rotates relative to the clamping plate (71); and when the movable plate (7212) is rotated so that the straight line connecting the docking hole (7215) and the threaded hole (7214) is parallel to the length direction of the clamping plate (71), the abutment end of the abutment strip (712) is located outside the clearance hole (711) and on the side of the clamping plate (71) away from the movable plate (7212).

7. The composite floor slab according to claim 5, characterized in that: The movable plate (7212) is slidably connected to the clamping plate (71) along the length direction of the clamping plate (71); a plurality of deformable abutment plates (713) are provided at one end of the clamping plate (71) close to the movable plate (7212); the abutment plates (713) are distributed along the circumference of the high-strength steel bar (6) on the periphery of the high-strength steel bar (6); and the abutment plates (713) are located on the side of the movable plate (7212) away from the fixed plate (7211); when the end of the locking bolt (722) is inserted into the docking hole (7215) and the locking bolt (722) rotates and approaches the movable plate (7212), the movable plate (7212) moves relative to the axial direction of the high-strength steel bar (6) and abuts against the abutment plates (713); the abutment plates (713) are used to abut against the surface of the high-strength steel bar (6) when pressed by the movable plate (7212).

8. The composite floor slab according to claim 5, characterized in that: The movable plate (7212) is slidably connected to the clamping plate (71) along the length direction of the clamping plate (71); a plurality of abutting blocks (714) are inserted through the side wall of the clamping plate (71); the abutting blocks (714) are slidably connected to the clamping plate (71) along a direction parallel to the radial direction of the high-strength steel bar (6); a variable spiral rib (715) is commonly connected between the abutting blocks (714) and the clamping plate (71); the deformation direction of the spiral rib (715) is parallel to the sliding direction of the abutting blocks (714) relative to the clamping plate (71); the abutting blocks (714) are located on the sliding path of the movable plate (7212) relative to the clamping plate (71); and the abutting blocks (714) are used to move toward the direction close to the high-strength steel bar (6) and press against the surface of the high-strength steel bar (6) when being resisted by the movable plate (7212).

9. The composite floor slab according to claim 5, characterized in that: The side wall of the fixing plate (7211) is provided with a plurality of anchor holes (73), and among all the anchor holes (73), there is an anchor hole (73) that is in communication with the threaded hole (7214).

Images