A composite floor slab

Abstract

This application relates to a composite floor slab, belonging to the technical field of prefabricated buildings; it includes a bottom plate, and also includes 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; a steel bar truss is also connected to the bottom plate, and one end of the steel bar truss away from the bottom plate is used to be connected to the first reinforcing rib or the second reinforcing rib; this application has the effect of improving the overall bending strength of the composite floor slab.

Description

Technical Field

[0001] This application relates to the technical field of prefabricated buildings, and particularly to a composite floor slab. Background Art

[0002] A prefabricated building is a building assembled with prefabricated components and fittings at the construction site by machinery, which has the advantages of good quality, high efficiency, fast construction, etc., improving the construction efficiency and reducing environmental pollution at the construction site. As a main component in prefabricated buildings, the composite floor slab has the characteristics of material saving, convenient and fast construction, and environmental protection.

[0003] The composite floor slab is an assembled monolithic floor slab formed by laminating a bottom slab and a cast-in-place reinforced concrete layer. The bottom slab is both one of the components of the floor slab structure and a permanent formwork for the cast-in-place reinforced concrete composite layer. In the actual preparation process, the bottom slab is placed in a precast mold, steel bars are embedded in the mold, and then concrete is poured into the mold. After the concrete is formed, the composite floor slab formed by combining the bottom slab and the cast-in-place reinforced concrete can be removed from the mold to achieve demolding and complete the preparation.

[0004] However, the existing composite floor slab has the disadvantage of insufficient overall flexural stiffness, resulting in easy damage and short service life of the composite floor slab, so it needs to be improved. Summary of the Invention

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

[0006] The composite floor slab provided by this application adopts the following technical solutions:

[0007] A composite floor slab includes a bottom slab, and also includes a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are arranged on the bottom slab; a steel bar truss is further connected to the bottom slab, and one end of the steel bar truss away from the bottom slab is used to be connected to the first reinforcing rib or the second reinforcing rib.

[0008] By adopting the above technical solutions, the setting of the first reinforcing rib and the second reinforcing rib is used to improve the stiffness of the composite floor slab of this application, realizing formwork-free and support-free, and connecting the first reinforcing rib and / or the second reinforcing rib through the steel bar truss to improve the crack resistance and flexural performance of the composite floor slab of this application, and improve the overall economy of the composite floor slab of this application, and finally form a composite floor slab.

[0009] Preferably, the first reinforcing rib includes a transverse rib and a longitudinal rib, and the transverse rib and the longitudinal rib are arranged on the bottom slab in a staggered manner along different directions of the bottom slab; the second reinforcing rib includes a long rib and a short rib, and the long rib and the short rib are distributed at intervals on the bottom slab.

[0010] By adopting the above technical solution, the first reinforcing rib includes a transverse rib and a longitudinal rib, and the transverse rib and the longitudinal rib are arranged in a staggered manner for arranging rib plates in different directions on the bottom plate. The second reinforcing rib includes a long rib and a short rib, and the long ribs and the short ribs are distributed at intervals for arranging rib plates of different lengths on the bottom plate. That is, the first reinforcing rib and the second reinforcing rib are further defined from two aspects: the distribution position of the rib plates and the length of the rib plates, so as to optimize the strengthening effect of the first reinforcing rib and the second reinforcing rib on the structural strength of the bottom plate.

[0011] Preferably, the steel bar truss includes triangular bars and connecting bars; the triangular bars are arranged on the bottom plate, and there are several triangular bars. Several triangular bars on the same straight line are jointly connected to the same connecting bar; the end of the triangular bar away from the bottom plate is connected to the second reinforcing rib, or is simultaneously connected to the first reinforcing rib and the second reinforcing rib.

[0012] By adopting the above technical solution, the present application uses the triangular bars, which are the reinforcing steel bars with a stable structure, as the embedded steel bars, so that the finally formed composite floor slab has better crack resistance and bending resistance; and the triangular bars are used to connect the first reinforcing rib and / or the second reinforcing rib to improve the connection strength and connection stability among the bottom plate, the first reinforcing rib and the second reinforcing rib.

[0013] Preferably, it further includes high-strength steel bars. An anchor is arranged at the end of the high-strength steel bar. The anchor includes a clamping plate and a locking member. The locking member includes an anchoring plate and a locking bolt; there are several clamping plates, which are distributed along the circumferential direction of the high-strength steel bar on the circumferential wall of the high-strength steel bar. The locking member is used to abut the clamping plate against the circumferential wall of the high-strength steel bar. The anchoring plate includes two symmetrically arranged support plates, and the end of one support plate is inserted into the end of the other support plate. Threaded holes for threaded connection of the locking bolt are provided at the ends of the two support plates where they are inserted into each other.

[0014] By adopting the above technical solution, the setting of the high-strength steel bars can further enhance the overall structural strength and anti-bending performance of the composite floor slab of the present application; the clamping plate is attached to the circumferential wall of the high-strength steel bar, and then the support plates included in the anchoring plate are wrapped on the surface of the clamping plate, and it is ensured that the ends of the two support plates belonging to the same anchoring plate are inserted into each other. Finally, the locking bolt is threadedly connected to the threaded hole at the insertion part of the ends of the support plates, so as to realize the fixed splicing of the two support plates belonging to the same anchoring plate through the locking bolt. The fixed splicing of the anchoring plate can make the clamping plate fixedly clamp on the surface of the high-strength steel bar, and finally establish the clamping of the clamping plate on the high-strength steel bar, and use the friction force between the clamping plate and the high-strength steel bar to realize the anchoring of the high-strength steel bar.

[0015] 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 connected to each other are provided with docking holes for inserting locking bolts;

[0016] 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.

[0017] 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 also makes it possible for 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 to 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.

[0018] Preferably, a clearance hole is formed through the side wall of the clamping plate near the movable plate, and an abutment strip is provided 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 facing away from the movable plate.

[0019] By adopting the above technical solution, 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 solution, 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 will rotate 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.

[0020] 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 around the high-strength steel bar, 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 rotates 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.

[0021] By adopting the above technical solution, the present application further divides the anchor plate into a fixed plate and a movable plate. As the name suggests, 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, and the present application 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, further optimizing the anchoring effect of the high-strength steel bar.

[0022] Preferably, the movable plate is connected to the clamping plate in a sliding manner along the length direction of the clamping plate, and a number of clamping blocks are inserted through the side walls of the clamping plate, and the clamping blocks are connected to the clamping plate in a sliding manner parallel to the radial direction of the high-strength steel bar. A variable spiral rib is 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 bar and press against the surface of the high-strength steel bar when it is interfered by the movable plate.

[0023] By adopting the above technical solution, during the sliding of the movable plate relative to the support plate, a tightening block is further set on the sliding path of the movable plate, and the abutting positions of the abutting block and the high-strength steel bars are limited to not 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.

[0024] Preferably, a plurality of anchoring holes are provided on the side wall of the fixing plate, and among all the anchoring holes there is an anchoring hole connected to the threaded hole.

[0025] 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 strengthening the connection strength and adhesion between the high-strength steel bars and the concrete. In addition, the presence of anchor holes connected to the threaded holes is limited. This limited condition enables the subsequently poured concrete to flow into the threaded holes through the anchor holes, so as to strengthen the connection tightness and strength between the locking bolts and the clamping plate through the concrete, and optimize the locking firmness of the locking bolts to the anchor plate.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] The first reinforcing rib and the second reinforcing rib are provided to improve the stiffness of the composite floor slab of the present application, realizing 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 additionally provided to improve the crack resistance and flexural performance of the composite floor slab of the present application, and to improve the overall economy of the composite floor slab of the present application, and finally a composite floor slab is formed.

[0028] An anchor is added to avoid the problem of stress relaxation of high-strength steel bars, and at the same time, the anchor is used to strengthen the connection adhesion and connection strength between the high-strength steel bars and the post-cast concrete, further optimizing the overall flexural and crack resistance performance of the composite floor slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a composite floor slab disclosed in Embodiment 1 of the present application.

[0030] Figure 2 is a schematic diagram for showing the distribution position of the first reinforcing rib on the bottom plate in Embodiment 1 of the present application.

[0031] Figure 3 is a schematic diagram for showing the steel bar truss structure in Embodiment 1 of the present application.

[0032] Figure 4 is Figure 1 a cross-sectional view taken along the line A-A in

[0033] Figure 5 is a schematic diagram for showing the anchor structure in Embodiment 1 of the present application.

[0034] Figure 6 is a schematic diagram for showing the positional relationship between the abutting piece and the movable plate in Embodiment 1 of the present application.

[0035] Figure 7 is Figure 6 a cross-sectional view taken along the line B-B in

[0036] Figure 8 is a schematic diagram for showing the anchor structure in Embodiment 2.

[0037] Description of reference numerals: 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 bar truss; 41, triangular rib; 42, connecting rib; 6, high-strength steel bar; 7, anchor; 71, clamping plate; 711, relief hole; 712, abutting strip; 713, abutting piece; 714, tightening block; 715, spiral rib; 72, locking member; 721, anchoring plate; 722, locking bolt; 7211, fixing plate; 7212, movable plate; 7213, support plate; 7214, threaded hole; 7215, docking hole; 7216, linkage block; 73, anchoring hole; 8, hollow foam board. Detailed implementation manners

[0038] The following further describes the present application in detail with reference to the Figure 1-8 accompanying drawings. Embodiment

[0039] Embodiment 1 of the present application discloses a composite floor slab. Refer to Figure 1 , the composite floor slab includes a bottom plate 1, a first reinforcing rib 2 disposed on one side of the bottom plate 1, and a second reinforcing rib 3 disposed on the other side. The first reinforcing rib 2 includes a transverse rib 21 and a longitudinal rib 22. The transverse rib 21 is disposed along the width direction of the bottom plate 1, and the longitudinal rib 22 is disposed along the length direction of the bottom plate 1. The second reinforcing rib 3 is disposed along the length direction of the bottom plate 1, and the second reinforcing rib 3 includes a long rib 31 and a short rib 32. The long rib 31 and the short rib 32 are spaced apart and distributed on the bottom plate 1.

[0040] Refer to Figure 3 and Figure 4 , and further includes a steel bar truss 4. The steel bar truss 4 includes a triangular rib 41 and a connecting rib 42. The connecting rib 42 is disposed along the length direction of the bottom plate 1, and the connecting rib 42 is adjacent to a plurality of 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 through 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 into a whole as shown in Figure 3 . Then, by placing the aforementioned whole on a preset mold table and pouring concrete into the mold table, the first reinforcing rib 2 connected to the bottom plate 1 and the steel bar truss 4 is formed, that is, a whole precast floor slab structure with a bottom plate 1, a first reinforcing rib 2, and a second reinforcing rib 3 as shown in Figure 4 is formed.

[0041] Refer to Figure 4 , Figure 5 and Figure 6, it further includes high-strength steel bars 6. An anchor is provided at the end of the high-strength steel bar 6. The anchor 7 includes a clamping plate 71 and a locking member 72. The locking member 72 includes an anchoring plate 721 and a locking bolt 722. There are several clamping plates 71, and two clamping plates 71 are joined together to form an annular structure and can be sleeved and fitted to the peripheral wall of the high-strength steel bar 6. The locking member 72 is used to fixedly sleeve the clamping plate 71 on the peripheral wall of the high-strength steel bar 6. Specifically, the anchoring 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 in the axial direction of the clamping plate 71 and can also rotate circumferentially relative to the clamping plate 71.

[0042] Refer to Figure 5 and Figure 6 , the fixed plate 7211 and the movable plate 7212 respectively include two support plates 7213 with a semicircular cross-section. A protrusion that can be inserted into the end wall of the other support plate 7213 is provided at the end of one of the support plates 7213. A threaded hole 7214 for threaded connection of the locking bolt 722 is provided in the protrusion on the fixed plate 7211, and a docking hole 7215 for inserting the locking bolt 722 is provided in the protrusion on the movable plate 7212. The docking hole 7215 is a circular hole with a smooth inner wall. A number of anchoring holes 73 are also penetrated through the side walls of the fixed plate 7211 and the movable plate 7212, and there is an anchoring hole 73 among all the anchoring holes 73 that is connected to the threaded hole 7214.

[0043] And it should be noted here that after the two support plates 7213 of the movable plate 7212 of the present application are joined together and before the locking bolt 722 is fixed, the straight line connecting the joining points of the two support plates 7213 of the movable plate 7212 and the joining 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, at this time, 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 docking hole 7215 at this time. 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 circumferentially along the clamping plate 71 so that the docking hole 7215 is located in the length direction of the locking bolt 722. Correspondingly, when the locking bolt 722 is inserted into both the threaded hole 7214 and the docking hole 7215 at the same time, the straight line connecting the joining points of the two support plates 7213 of the movable plate 7212 and the joining 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.

[0044] Refer to Figure 6 and Figure 7The side wall of the clamping plate 71 near the movable plate 7212 is provided with a clearance hole 711, and an abutment bar 712 is provided in the clearance hole 711. The middle part of the abutment bar 712 is hinged to the inner wall of the clearance hole 711, and a torsion spring is sleeved on the hinge center; one end of the abutment bar 712 is a linkage end, and the other end is an abutment end. The side wall of the movable plate 7212 facing the clamping plate 71 is provided with a linkage block 7216 for inserting into the clearance hole 711, and when the torsion spring is not deformed, the linkage end of the abutment bar 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 abutting end of the abutting 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 abutting end of the abutting 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.

[0045] Reference Figure 5 and Figure 6 A plurality of deformable abutment pieces 713 are provided at one end of the clamping plate 71 near the movable plate 7212. The abutment pieces 713 are distributed circumferentially around the high-strength steel bar 6 and are located on the side of the movable plate 7212 facing away from the fixed plate 7211. When the abutment pieces 713 are not deformed, they are located on the path of movement of the movable plate 7212 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 further tightened to move the locking bolt 722 toward the movable plate 7212. At this time, the end of the locking bolt 722 pushes against the inner wall of the docking hole 7215, causing the movable plate 7212 to move relative to the axis of the high-strength steel bar 6 and abut against the abutment pieces 713, causing the abutment pieces 713 to deform toward the high-strength steel bar 6 and abut against 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

[0046] The difference between Example 2 of the present application and Example 1 is that: Figure 8, 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 the direction parallel to the radial direction of the high-strength steel bar 6. A deformable 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 block 714 relative to the clamping plate 71. The abutting block 714 is located on the sliding path of the movable plate 7212 when it slides along the axial direction of the clamping plate 71, and the abutting block 714 is used to move towards the high-strength steel bar 6 and penetrate through the clamping plate 71 and finally press against the surface of the high-strength steel bar 6 when being abutted by the movable plate 7212.

[0047] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A composite floor slab, comprising a bottom plate (1), characterized in that: It also includes 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); It also includes a high-strength steel bar (6), the end of the high-strength steel bar (6) is provided with an anchor (7), the anchor (7) includes a clamping plate (71) and a locking member (72), the locking member (72) includes an anchor plate (721) and a locking bolt (722); the clamping plates (71) are multiple and are distributed along the circumference of the high-strength steel bar (6) on the peripheral wall 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), and 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 threading the locking bolt (722); 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 circumference of the support plate; the threaded hole (7214) is opened on the fixed plate (7211), and the two support plates (7213) included in the movable plate (7212) are provided with a docking hole (7215) for inserting a locking bolt (722) at their mutually plugged ends; 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 and the positions where the clamping plates (71) are joined together are not on the same straight line; The side wall of the clamping plate (71) near the movable plate (7212) is provided with a clearance hole (711), and an abutting bar (712) is provided in the clearance hole (711). The middle part of the abutting bar (712) is hinged to the inner wall of the clearance hole (711), and one end of the abutting bar (712) is a linkage end and the other end is an abutting end; the side wall of the movable plate (7212) facing the clamping plate (71) is provided with a linkage block (7216) for inserting into the clearance hole (711), and The linkage end of the abutment bar (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 bar (712) is located outside the clearance hole (711) and on the side of the clamping plate (71) away from the movable plate (7212); The movable plate (7212) is connected to the clamping plate (71) by sliding along the length direction of the clamping plate (71), and a plurality of deformable abutting pieces (713) are provided at one end of the clamping plate (71) close to the movable plate (7212). The abutting pieces (713) are distributed around the high-strength steel bar (6) along the circumference of the high-strength steel bar (6), and the abutting pieces (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) is rotated 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 abutting piece (713). The abutting piece (713) is used to abut against the surface of the high-strength steel bar (6) when it is pressed by the movable plate (7212).

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, wherein: The steel bar truss (4) includes triangular bars (41) and connecting bars (42); The triangular ribs (41) are arranged on the bottom plate (1), and there are a plurality of triangular ribs (41), and the plurality of triangular ribs (41) on the same straight line are connected to the same connecting rib (42); the end of the triangular rib (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, wherein: The movable plate (7212) is connected to the clamping plate (71) by sliding along the length direction of the clamping plate (71), and a plurality of abutting blocks (714) are inserted through the side wall of the clamping plate (71), and the abutting blocks (714) are connected to the clamping plate (71) by sliding along a 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), and 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 they are abutted by the movable plate (7212).

5. The composite floor slab according to claim 1, characterized in that: The side wall of the fixing plate (7211) is provided with a plurality of anchoring holes (73), and among all the anchoring holes (73), there is an anchoring hole (73) that is in communication with the threaded hole (7214).

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