Floor concrete surface layer structure capable of reducing hollowing

Abstract

The utility model relates to a floor concrete surface layer structure capable of reducing hollowing, and belongs to the field of building construction, the floor concrete surface layer structure comprises a leveling layer and a reinforcing steel bar surface layer, the reinforcing steel bar surface layer is located above the leveling layer, a reinforcing steel bar net is arranged in the reinforcing steel bar surface layer, the leveling layer is fixedly connected with a plurality of expansion bolts, the upper ends of the expansion bolts are located in the reinforcing steel bar surface layer, and the lower ends of the expansion bolts are located in the reinforcing steel bar surface layer. And the reinforcing mesh and the expansion bolt are relatively fixed. Before the concrete of the steel bar surface layer is poured, the steel bar mesh is fixed to the leveling layer through the expansion bolts, in the later pouring process, the state of the steel bar mesh is more stable, shaking is not prone to occurring, and therefore the probability that the concrete hollowing defect occurs in the steel bar surface layer is reduced.

Description

Technical Field

[0001] This application relates to the field of building construction, and in particular, to a floor concrete surface layer structure for reducing hollowing. Background Art

[0002] The floor is the top surface of a house, and the concrete surface layer is the topmost concrete layer of the floor. Usually, a steel bar and concrete structure is cast in place.

[0003] In the related art, the first step in the construction of the concrete surface layer is formwork support, then a steel bar mesh is placed, and then concrete is poured. Since the steel bar mesh has a high degree of freedom and a large lateral dimension range, during the solidification of the concrete during pouring, the steel bar mesh in the part not covered by the concrete is likely to shake, swing, etc., causing the steel bar mesh in the part already covered by the concrete to move together, and thus causing hollowing in the concrete structure. Utility Model Content

[0004] In order to improve the above problems, this application provides a floor concrete surface layer structure for reducing hollowing.

[0005] The floor concrete surface layer structure for reducing hollowing provided by this application adopts the following technical solutions:

[0006] A floor concrete surface layer structure for reducing hollowing includes a leveling layer and a steel bar surface layer. The steel bar surface layer is located above the leveling layer. A steel bar mesh is provided in the steel bar surface layer. A number of expansion bolts are fixedly connected to the leveling layer. The upper end of the expansion bolt is located in the steel bar surface layer, and the steel bar mesh and the expansion bolt are relatively fixed.

[0007] Preferably, a height-fixing nut is threadedly connected to the expansion bolt, and the height-fixing nut is used to determine the height position of the steel bar mesh relative to the expansion bolt.

[0008] Preferably, the steel bar mesh is fixedly connected to the height-fixing nut and / or the expansion bolt by welding.

[0009] Preferably, a positioning sleeve is sleeved on the expansion bolt. The lower end of the positioning sleeve abuts against the surface of the leveling layer. The height-fixing nut is located above the positioning sleeve. A mating body is fixedly connected to the side wall of the positioning sleeve, and the mating body is used to cooperate with and fix the steel bar mesh.

[0010] Preferably, the mating body includes a clamping angle plate. An included angle groove is formed on the clamping angle plate. The clamping angle plate and the positioning sleeve respectively abut against the opposite sides of the steel bar of the steel bar mesh. The groove wall of the included angle groove contacts the side wall of the steel bar, and the clamping angle plate is movably connected to the positioning sleeve.

[0011] Preferably, the clamping angle plate and the positioning sleeve are hinged, the hinge axis is parallel to the length direction of the steel bars of the steel bar mesh, a positioning plate is fixedly connected to the end of the clamping angle plate away from its hinge axis, a relief hole is formed in the positioning plate, the expansion bolt passes through the relief hole, one side of the positioning plate abuts against the upper end surface of the positioning sleeve, and the other side abuts against the lower side of the height-fixing nut.

[0012] Preferably, a receiving groove is formed in the side wall of the positioning sleeve, and the groove wall of the receiving groove fits and abuts against the side wall of the steel bar of the steel bar mesh.

[0013] This application includes at least one of the following beneficial technical effects:

[0014] 1. Through the arrangement of the expansion bolts, before pouring, the expansion bolts are fixed to the steel bar mesh, that is, the steel bar mesh is fixed relative to the already shaped leveling layer. During the pouring process, the steel bar mesh is not likely to displace or shake significantly, so it is not likely to form air pockets in the later formed steel bar surface layer;

[0015] 2. Through the arrangement of the height-fixing nut and the positioning sleeve, the height position point where the steel bar mesh is fixed relative to the expansion bolt is determined, so that the height position dimension of the steel bar mesh in the steel bar surface layer is more accurate and stable. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the first structure of the floor concrete surface layer for reducing air pockets in the embodiment of this application.

[0017] Figure 2 It is a schematic structural diagram of the second structure of the floor concrete surface layer for reducing air pockets in the embodiment of this application.

[0018] Description of the reference numerals: 1, leveling layer; 11, expansion bolt; 2, steel bar surface layer; 21, steel bar mesh; 3, height-fixing nut; 31, positioning sleeve; 311, receiving groove; 32, fitting body; 321, clamping angle plate; 3211, angle groove; 322, positioning plate; 3221, relief hole. Detailed Description of the Invention

[0019] The following will further describe this application in detail Figure 1-2 with reference to the attached

[0020] This application embodiment discloses a floor concrete surface layer structure for reducing air pockets. As Figure 1 shown, it includes a leveling layer 1 and a steel bar surface layer 2. The steel bar surface layer 2 is located above the leveling layer 1, and a steel bar mesh 21 is horizontally laid in the steel bar surface layer 2. After the leveling layer 1 is laid and shaped, a plurality of expansion bolts 11 are driven into the leveling layer 1, and the expansion bolts 11 are used to fix the steel bar mesh 21 in the steel bar surface layer 2.

[0021] AsFigure 1 As shown, the length direction of the expansion bolt 11 is the vertical direction, and the length directions of the respective reinforcing bars of the reinforcing bar mesh 21 are all horizontal directions. A height-determining nut 3 is threadedly connected to the expansion bolt 11, and the height-determining nut 3 is used to determine the height position of the reinforcing bar mesh 21 relative to the expansion bolt 11.

[0022] Method 1: As Figure 1 shown, the height-determining nut 3 is screwed onto the expansion bolt 11, the lower end face of the height-determining nut 3 abuts against the surface of the leveling layer 1, the reinforcing bars of the reinforcing bar mesh 21 simultaneously abut against the upper end face of the height-determining nut 3 and the expansion bolt 11, and then the reinforcing bars are welded and fixed to the height-determining nut 3 and the expansion bolt 11.

[0023] Method 2: As Figure 2 shown, a positioning sleeve 31 is also sleeved on the expansion bolt 11, the lower end of the positioning sleeve 31 abuts against the surface of the leveling layer 1, and the height-determining nut 3 is located above the positioning sleeve 31 and is screwed down tightly. A mating body 32 is fixedly connected to the side wall of the positioning sleeve 31, and the mating body 32 is used to cooperate with and fix the reinforcing bar mesh 21. The mating body 32 includes a clamping angle plate 321 and a positioning plate 322 formed integrally. An included angle groove 3211 is formed on the clamping angle plate 321, the positioning plate 322 is located at one side edge of the clamping stirrer, and the end of the clamping angle plate 321 away from the positioning plate 322 is hinged to the side wall of the positioning sleeve 31. The hinge axis is in the horizontal direction and is parallel to the length direction of the reinforcing bar of the reinforcing bar mesh 21 close to the positioning sleeve 31. The mesh bars of the reinforcing bar mesh 21 are placed between the clamping angle plate 321 and the positioning sleeve 31 and above the hinge axis, and then the clamping angle plate 321 is swung close to the positioning sleeve 31, so that the groove wall of the included angle groove 3211 contacts and abuts against the side wall of the reinforcing bar, and the side wall of the reinforcing bar on the side away from the clamping angle plate 321 abuts against the side wall of the positioning sleeve 31. A receiving groove 311 is formed on the side wall of the positioning sleeve 31, the bottom of the receiving groove 311 is an arc surface, and the groove wall of the receiving groove 311 fits and abuts against the side wall of the reinforcing bar of the reinforcing bar mesh 21, and the clamped reinforcing bar has higher position stability between the clamping angle plate 321 and the positioning sleeve 31. A relief hole 3221 is formed on the positioning plate 322. When the clamping angle plate 321 is swung close to the positioning sleeve 31, the relief hole 3221 is an elongated hole, the length direction of the hole is perpendicular to the hinge axis of the clamping angle plate 321, the relief hole 3221 allows the expansion bolt 11 to pass through, and when the clamping angle plate 321 and the positioning sleeve 31 form a clamping and abutting state on the reinforcing bar, the lower plate surface of the positioning plate 322 abuts against the upper end surface of the positioning sleeve 31; then the height-determining nut 3 is screwed onto the expansion bolt 11, and the height-determining nut 3 abuts against the upper plate surface of the positioning plate 322 to clamp the positioning plate 322 and the clamping angle plate 321, so as to fix the state of the clamping angle plate 321. Subsequently, the reinforcing bar is welded and fixed to the clamping angle plate 321.

[0024] The implementation principle of a floor concrete surface layer structure for reducing hollowing in an embodiment of the present application is as follows:

[0025] After expansion bolts 11 are provided in the leveling layer 1, the steel mesh 21 is fixedly connected by height-fixing bolts or positioning sleeves 31, and then concrete is poured. Structures such as the expansion bolts 11, height-fixing nuts 3, and positioning sleeves 31 are all left in the concrete structure together with the steel mesh 21.

[0026] The above are all preferred embodiments of the present application. Without restricting the protection scope of the present application based on this, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A floor concrete surface structure for reducing hollowing, comprising a leveling layer (1) and a steel surface layer (2), wherein the steel surface layer (2) is located above the leveling layer (1), and a steel mesh (21) is provided in the steel surface layer (2), characterized in that: The leveling layer (1) is fixedly connected with a plurality of expansion bolts (11), the upper ends of the expansion bolts (11) are located in the steel bar surface layer (2), and the steel bar mesh (21) and the expansion bolts (11) are relatively fixed.

2. A floor concrete surface structure for reducing hollowing according to claim 1, characterized in that: A height-fixing nut (3) is threadedly connected to the expansion bolt (11), and the height-fixing nut (3) is used to determine the height position of the steel mesh (21) relative to the expansion bolt (11).

3. A floor concrete surface structure for reducing hollowing according to claim 2, characterized in that: The steel mesh (21) and the height-fixing nuts (3) and / or the expansion bolts (11) are fixed by welding.

4. A floor concrete surface structure for reducing hollowing according to claim 2, characterized in that: A positioning sleeve (31) is sleeved on the expansion bolt (11), the lower end of the positioning sleeve (31) is in contact with the surface of the leveling layer (1), the height fixing nut (3) is located above the positioning sleeve (31), and a matching body (32) is fixedly connected to the side wall of the positioning sleeve (31), and the matching body (32) is used to match and fix with the steel mesh (21).

5. A floor concrete surface structure for reducing hollowing according to claim 4, characterized in that: The matching body (32) comprises a clamping angle plate (321), on which an angle groove (3211) is formed, the clamping angle plate (321) and the positioning sleeve (31) respectively abut against opposite sides of a steel bar of the steel mesh (21), the groove wall of the angle groove (3211) contacts the side wall of the steel bar, and the clamping angle plate (321) and the positioning sleeve (31) are movably connected.

6. A floor concrete surface structure for reducing hollowing according to claim 5, characterized in that: The clamping angle plate (321) and the positioning sleeve (31) are hinged, and the hinge axis is parallel to the length direction of the steel bar of the steel mesh (21). The end of the clamping angle plate (321) away from its own hinge axis is fixedly connected to a positioning plate (322), and a clearance hole (3221) is opened on the positioning plate (322), and the clearance hole (3221) is for the expansion bolt (11) to pass through. One side of the positioning plate (322) abuts against the upper end surface of the positioning sleeve (31), and the other side abuts against the lower side of the height-fixing nut (3).

7. A floor concrete surface structure for reducing hollowing according to claim 6, characterized in that: A receiving groove (311) is provided on the side wall of the positioning sleeve (31), and the groove wall of the receiving groove (311) is in close contact with the side wall of the steel bar of the steel mesh (21).

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