Prefabricated large-span steel mesh hollow floor structure

Abstract

The present invention relates to an assembled large-span steel mesh hollow floor structure, which includes a bottom plate, a box fixing, a longitudinal stress-bearing steel mesh of the bottom plate, a built-in box, adjustable legs of the box, a protective layer pad and a reinforced steel mesh, wherein the bottom plate is arranged at the bottom, the longitudinal stress-bearing steel mesh of the bottom plate is fixed between the bottom plate and the built-in box, the reinforced steel mesh fixes the bottom plate and the protective layer pad together by rivets or self-tapping screws, a plurality of box fixings are arranged at intervals on the bottom plate, a plurality of the built-in boxes are arranged at intervals through the box fixings and fixed on the bottom plate above the stress-bearing steel mesh, the four top corners of the built-in box are provided with adjustable legs of the box, the reinforced steel mesh is buckled on the top of the built-in box, and the bottom of the reinforced steel mesh is spaced from the bottom plate by a plurality of protective layer pads. The present invention has a simple and reasonable structure, low labor intensity, low cost, fast construction progress and easy quality control.

Description

Technical Field

[0001] The invention relates to a permanent assembled steel mesh hollow floor slab built-in box construction component used in on-site construction pouring of assembled cast-in-place concrete hollow floor slabs, and more specifically to an assembled large-span steel mesh hollow floor slab structure. Background Art

[0002] With the progress of society and the development of the market economy, various new structural products and construction methods have emerged in large numbers, and the diversification of materials has become increasingly obvious. Among them, a permanent built-in box is widely used in cast-in-place concrete hollow slabs in building structure construction to reduce some beams, columns and concrete in the slabs to reduce the overall cost of the building and increase the usable space, making the structural force more reasonable.

[0003] At present, more and more new projects in the construction industry tend to be large-space, beamless and few-column structures, that is, cast-in-place beamless hollow slab structural systems. The system is characterized by a gap grid formed by multiple boxes evenly distributed in water and arranged with gaps in the cast-in-place slab. The hidden beam system formed after the concrete is poured on site bears its external load, avoiding the effect of the original main and secondary beams being exposed and occupying space under the slab, which saves raw materials and increases the usable space, speeds up the construction period and reduces costs.

[0004] During the construction of the built-in box of the traditional cast-in-place beamless hollow slab, it is necessary to install the built-in box in the middle of the reinforced concrete of the hollow slab. Therefore, after the bottom reinforcement is laid, the box should be arranged, installed and fixed according to the requirements of the drawings. At the same time, pads are set at the four feet of each box, and each built-in box is tied and fixed to the bottom reinforcement with iron wire to prevent the built-in box from floating or horizontal displacement during concrete pouring, affecting the quality of construction. At the same time, a single box needs to be fixed independently to ensure the distance between each other. Since the reinforcement tying work is cumbersome and labor-intensive, and a large number of pads and tying materials are required, the cost is high, and the quality is difficult to control, which affects the construction progress and cannot meet the construction requirements of large-span prefabricated buildings. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of lack of products to choose for large-span prefabricated floors with the rapid development of prefabricated buildings. It is to provide a prefabricated large-span steel mesh hollow floor structure for the on-site construction requirements of building large-span cast-in-place concrete hollow floors. The hollow floor structure of the mesh is simple and reasonable, with low labor intensity, low cost, fast construction progress and easy quality control.

[0006] The objective of the present invention is achieved in this way. An assembled large-span steel mesh hollow floor structure comprises a base plate, a box fixing, a longitudinal stress-bearing steel mesh of the base plate, a built-in box, adjustable box legs, a protective layer pad and a reinforced steel mesh. The base plate is arranged at the bottom, and the longitudinal stress-bearing steel mesh of the base plate is fixed between the base plate and the built-in box. The reinforced steel mesh fixes the base plate and the protective layer pad together by rivets or self-tapping screws. A plurality of box fixings are arranged at intervals on the base plate, and a plurality of built-in boxes are arranged at intervals and fixed on the base plate above the longitudinal stress-bearing steel mesh of the base plate through the box fixings. The four top corners of the built-in box are provided with adjustable box legs. The reinforced steel mesh is buckled on the top of the built-in box, and the bottom of the reinforced steel mesh is spaced apart from the base plate by a plurality of protective layer pads.

[0007] The reinforced steel mesh frame includes lower chord stress-bearing steel bars, V-shaped web bars, upper chord reinforcement steel and transverse tie bars. The lower chord stress-bearing steel bars, V-shaped web bars and upper chord reinforcement steel are connected to form a stress-bearing mesh body. At least two stress-bearing mesh bodies are arranged in parallel and connected by multiple transverse tie bars to form a reinforced steel mesh frame.

[0008] The present invention has the following advantages and positive effects:

[0009] 1. The present invention is widely used in large-span cast-in-place concrete hollow slabs, which reduces the use of beams and columns. On the basis of saving materials, it meets the requirements of large-span prefabricated buildings, improves efficiency, reduces building costs, increases usable space, and makes the structural force more reasonable.

[0010] 2. The structure of the present invention is simple and reasonable, which meets the requirements of prefabricated components. It is light in weight and reasonable in structure. During construction, the prefabricated strip steel mesh hollow floor slabs processed in the factory can be assembled one by one according to the drawings, and the steel bars between the boxes in the other direction of the vertical strip steel mesh hollow floor slabs can be tied to form load-bearing rib beams in the other direction. They are evenly distributed and do not require pads and box positioning and binding. The hollow floor slabs will not float up or move horizontally, which is convenient for transportation and installation and the transportation quantity is greatly increased. The on-site assembly efficiency is high during construction, the labor intensity is small, the cost is low, the construction progress is fast, and the quality is easier to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 It is the front view of the present invention.

[0013] Figure 3 The present invention Figure 2 Exploded view of part A.

[0014] Figure 4 This is a construction arrangement reference diagram used in the hollow-core floor slab construction process of the present invention. DETAILED DESCRIPTION

[0015] By the attached Figure 1 , 2 , 3, and 4 show: an assembled large-span steel mesh hollow floor structure, the hollow floor structure includes a bottom plate 1, a box fixing part 2, a bottom plate longitudinal force-bearing steel mesh 3, a built-in box 4, a box adjustable leg 5, a protective layer pad 6, and a reinforced steel mesh 7. The bottom plate 1 is arranged at the bottom, the bottom plate longitudinal force-bearing steel mesh 3 is fixed between the bottom plate 1 and the built-in box 4, and the reinforced steel mesh 7 fixes the bottom plate 1 and the protective layer pad 6 together by rivets or self-tapping screws 8. The bottom plate 1 A plurality of box fixings 2 are arranged at intervals on the upper part, and the box fixings 2 are fixed with bolts. A plurality of built-in boxes 4 are passed through the box fixings 2 and are arranged at intervals and fixed on the upper bottom plate 1 of the stressed steel mesh 3. The four top corners of the built-in boxes 4 are provided with adjustable box legs 5. The reinforced steel mesh frame 7 is buckled on the top of the built-in boxes 4, and the bottom of the reinforced steel mesh frame 7 is spaced from the bottom plate 1 by a plurality of protective layer pads 6 (stressed steel protective layer).

[0016] The reinforced steel mesh frame 7 includes lower chord stress-bearing steel bars 7-1, V-shaped web bars 7-2, upper chord reinforcement steel 7-3 and transverse tie bars 7-4. The lower chord stress-bearing steel bars 7-1, V-shaped web bars 7-2 and upper chord reinforcement steel 7-3 are connected to form a stress-bearing mesh body. At least two stress-bearing mesh bodies are arranged in parallel and connected by multiple transverse tie bars 7-4 to form a reinforced steel mesh frame 7.

[0017] The stressed steel mesh 3 is tilted upward in the short direction and is integrated with the concrete rib beams poured between the boxes.

[0018] The adjustable legs 5 of the box body can adjust the thickness of the concrete below the box body by adjusting the height of the adjustable legs 5 .

[0019] The bottom plate 1 used in the present invention is a detachable bottom plate that does not need to be disassembled.

Claims

1. An assembled large-span steel mesh hollow floor structure, characterized by: The hollow floor structure comprises a bottom plate (1), a box fixing member (2), a bottom plate longitudinal stress-bearing steel mesh sheet (3), a built-in box (4), adjustable box legs (5), a protective layer pad (6) and a reinforced steel mesh frame (7), wherein the bottom plate (1) is arranged at the bottom, the bottom plate longitudinal stress-bearing steel mesh sheet (3) is fixed between the bottom plate (1) and the built-in box (4), and the reinforced steel mesh frame (7) is fixed to the bottom plate (1) and the protective layer pad (6) by rivets or self-tapping screws (8). A plurality of box fixing members (2) are arranged at intervals on the bottom plate (1); a plurality of built-in boxes (4) are arranged at intervals through the box fixing members (2) and fixed on the bottom plate (1) above the longitudinal force-bearing steel mesh sheet (3) of the bottom plate; four top corners of the built-in boxes (4) are provided with box adjustable legs (5); the reinforced steel mesh frame (7) is buckled on the top of the built-in boxes (4); and the bottom of the reinforced steel mesh frame (7) is spaced from the bottom plate (1) by a plurality of protective layer pads (6); The reinforced steel mesh frame (7) comprises lower chord stress-bearing steel bars (7-1), V-shaped web bars (7-2), upper chord reinforcement steel (7-3) and transverse tie bars (7-4); the lower chord stress-bearing steel bars (7-1), V-shaped web bars (7-2) and upper chord reinforcement steel (7-3) are connected to form a stress-bearing mesh body; at least two stress-bearing mesh bodies are arranged in parallel and connected by a plurality of transverse tie bars (7-4) to form the reinforced steel mesh frame (7).

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