Bottom steel bar supporting component for reinforced concrete slab

Abstract

The utility model discloses a reinforced concrete slab bottom reinforcing steel bar supporting component which comprises a cushion block body, a horizontal binding hole is formed in the middle of the cushion block body, a binding limiting pipe is arranged in the binding hole, a horizontal top supporting part is arranged at the top of the cushion block body, and an arc-shaped top supporting groove is formed in the middle of the top supporting part. The cushion block body is filled with steel fibers, and the steel fibers are irregularly distributed in the cushion block body in a crossed mode. The cushion block main body is in the shape of the regular quadrangular frustum pyramid, so that the cushion block is more stable, the stability of reinforcing steel bar support of the bottom plate is improved, and the situation that the cushion block is loaded and topples over is avoided. The cushion block main body is made of high-strength slurry or ultra-dense concrete, and the strength of the cushion block can be further improved by matching with the steel fibers filled in the cushion block main body.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, and particularly relates to a bottom steel bar support member for a reinforced concrete slab. Background Art

[0002] In building construction projects, the bottom steel bars of reinforced concrete slabs should be at a certain distance above the bottom of the slab. This distance is called the cover thickness. Its function is to use the concrete of the cover thickness to protect the steel bars and prevent them from rusting to meet the durability requirements. The cover thickness of the lower-layer steel bars of raft foundations is: generally 40mm when there is a concrete cushion, and 70mm when there is no cushion; for floor slabs, it is generally 15mm. Exposed steel bars or insufficient cover thickness at the bottom of reinforced concrete slabs are common quality problems in engineering construction. The main reasons are that the supports under the bottom steel bars of reinforced concrete slabs are unstable, the steel bars and the support members are not effectively connected during construction, and the bottom steel bars and the support members are disengaged before or during concrete pouring, resulting in the sinking of the steel bars, so that the cover thickness of the bottom steel bars is insufficient or even exposed steel bars occur; in addition, the non-standard concrete bottom steel bar support members, which do not meet the design cover requirements, are also the main reasons for the insufficient cover thickness of the bottom steel bars. At present, the most commonly used for each project is the cuboid mortar cushion blocks, and some good projects will use prefabricated cushion blocks in the factory, but these cushion blocks cannot accurately and effectively ensure the concrete cover thickness and completely and effectively support the bottom steel bars during construction. Therefore, it is necessary to propose a bottom steel bar support member for a reinforced concrete slab with better strength and more stable support. Summary of the Invention

[0003] In view of the above deficiencies of the prior art, the utility model provides a bottom steel bar support member for a reinforced concrete slab.

[0004] To achieve the above invention purpose, the technical solution adopted by the utility model is: including a cushion block main body, a horizontally arranged binding hole is provided in the middle of the cushion block main body, a binding limiting tube is arranged in the binding hole, a horizontally arranged top support part is provided at the top of the cushion block main body, and an arc-shaped top support groove is provided in the middle of the top support part; steel fibers are filled in the cushion block main body, and the steel fibers are irregularly and crossly distributed inside the cushion block main body.

[0005] Further, the cushion block main body is in the shape of a regular quadrangular frustum.

[0006] Further, the included angle between the side surface and the bottom surface of the cushion block main body is 60° - 85°.

[0007] Further, an arc-shaped bottom support groove is provided at the bottom of the cushion block main body, and the direction of the bottom support groove is the same as that of the top support groove.

[0008] Further, the material of the cushion block main body is high-strength slurry or super-dense concrete.

[0009] Furthermore, the binding limiting tube is made of plastic material.

[0010] Furthermore, the cross-section of the top support groove is bow-shaped.

[0011] Furthermore, the side surface of the cushion block body is treated by the hair-raising treatment process to form a rough surface.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The cushion block body of the present utility model is in the shape of a regular quadrangular frustum, which is more stable, increases the stability of the bottom plate steel bar support, and the situation that the cushion block itself is loaded and toppled will not occur.

[0014] The cushion block body of the present utility model is made of high-strength slurry or super-dense concrete. Combined with the steel fibers filled in the cushion block body, the strength of the cushion block can be further improved.

[0015] The present utility model adopts the hair-raising treatment on the side surface of the cushion block body, which can make the cast concrete connect more firmly with the cushion block and has less influence on the structure.

[0016] The material of the present utility model adopts high-strength slurry or super-dense concrete, which is one grade higher than the strength of the reinforced concrete raft or slab structure concrete in this part, meeting the strength requirements of the cushion block. Generally, the cushion blocks of manufacturers adopt cement mortar, and the strength cannot reach the requirements of the structural concrete strength, resulting in local weakening of the structural strength of the cushion block part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a front view of the present utility model;

[0019] Figure 3 is a top view of the present utility model;

[0020] The symbols of each component are as follows:

[0021] 1, cushion block body; 11, top support part; 12, top support groove; 13, binding hole; 2, binding limiting tube; 3, steel fiber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following describes the specific embodiments of the present utility model to facilitate those skilled in the art of this technology to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of this technology, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all utility models created using the concept of the present utility model are within the scope of protection.

[0023] As Figure 1 , 2 and shown in Figure 3, the bottom steel bar support member of the reinforced concrete slab includes a cushion block body 1. A horizontally arranged binding hole 13 is provided in the middle of the cushion block body 1. A binding limiting tube 2 is arranged in the binding hole 13. A horizontally arranged top support portion 11 is provided at the top of the cushion block body 1. An arc-shaped top support groove 12 is provided in the middle of the top support portion 11. Steel fibers 3 are filled in the cushion block body 1, and the steel fibers 3 are irregularly cross-distributed inside the cushion block body 1.

[0024] In this embodiment, the cushion block body 1 is in the shape of a regular quadrangular frustum. The included angle between the side surface and the bottom of the cushion block body 1 is 60° - 85°, and preferably 76° in this embodiment. The regular quadrangular frustum-shaped cushion block body 1 has a larger support area and can achieve a more stable support effect. The bottom length of the cushion block body 1 is determined according to the thickness of the protective layer. The top side length of the cushion block body 1 is preferably 40 mm, the width of the top support groove 12 is preferably 24 mm, the depth is preferably 5 mm, and the distance between the bottom of the top support groove 12 and the binding hole 13 is preferably 5 mm. The height between the bottom of the top support groove 12 and the bottom of the cushion block body 1 is generally: 15 mm for the floor slab and 40 mm for the raft foundation.

[0025] In this embodiment, an arc-shaped bottom support groove is provided at the bottom of the cushion block body 1, and the direction of the bottom support groove is the same as that of the top support groove 12. The arc-shaped bottom support groove can further reduce the weight of the cushion block body 1 while ensuring the strength of the cushion block body 1. The arc-shaped bottom support groove can also further increase the bonding area with the concrete, thereby ensuring the integrity of the cushion block body 1 and the concrete.

[0026] The binding limiting tube 2 is made of plastic. When manufacturing the cushion block body 1, the binding limiting tube 2 can limit the steel fibers 3, thereby preventing the steel fibers 3 from accumulating at the binding hole 13. The binding limiting tube 2 can form the binding hole 13 when manufacturing the cushion block body 1, facilitating the binding and fixing of the cushion block body 1 and the steel bar through a steel wire and preventing the cushion block body 1 from moving.

[0027] The cross-section of the top support groove 12 is in the shape of a bow. The bow-shaped cross-section of the top support groove 12 can better fit the bottom of the steel bar, thereby providing bottom limiting support for the steel bar.

[0028] In this embodiment, the material of the spacer block body 1 is high-strength slurry or super-dense concrete, and the side surface of the spacer block body 1 is treated with a roughening treatment process to form a rough surface. The spacer block body 1 is made of high-strength slurry or super-dense concrete, and its strength grade is one grade higher than the concrete strength grade of the raft or floor slab structure. The side surfaces of the spacer block body 1 are all roughened to increase the adhesion to the newly poured concrete.

[0029] Working principle and process: When manufacturing the spacer block body 1, steel fibers are added to the high-strength slurry or super-dense concrete and stirred evenly to form a mixture. Then, the binding limit tube 2 is fixed on the mold, and then the mixture containing steel fibers is added into the mold. Wait for the spacer block body 1 to solidify, thus forming the spacer block body 1. Roughening protrusions can be provided on the inner part of the mold, so as to realize the roughening treatment on the outer side surface of the spacer block body 1. During construction, only need to place the bottom steel bars on the top support groove 12, use 2 binding wires to pass through the binding limit tube 2 on the binding hole 13, and use the binding wires to tie the steel bars and the spacer block body 1 together to achieve the effect of stable connection. The spacer block body 1 should be placed in a plum blossom shape, and the spacing in the support area is 1 m in both the longitudinal and transverse directions.

Claims

1. A steel bar support member at the bottom of a reinforced concrete slab, characterized in that: The invention comprises a cushion block body (1), wherein a horizontal binding hole (13) is arranged in the middle of the cushion block body (1), a binding limit tube (2) is arranged in the binding hole (13), a horizontal top support portion (11) is arranged at the top of the cushion block body (1), and an arc-shaped top support groove (12) is arranged in the middle of the top support portion (11).

2. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The cushion block body (1) is in the shape of a regular quadrangular pyramid.

3. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The included angle between the side and bottom of the cushion block body (1) is 60°-85°.

4. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The bottom of the cushion block body (1) is provided with an arc-shaped bottom support groove, and the bottom support groove is in the same direction as the top support groove (12).

5. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The material of the pad block body (1) is high-strength slurry or ultra-dense concrete.

6. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The binding limiting tube (2) is made of plastic.

7. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The cross section of the top supporting groove (12) is arched.

8. The bottom steel bar support member of the reinforced concrete slab according to claim 1, characterized in that: The side surface of the cushion block body (1) is roughened by a roughening process.

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