Ultrathin prefabricated slab suitable for large-volume concrete underpass channel top plate

Abstract

The utility model discloses an ultra-thin prefabricated slab suitable for a large-volume concrete underpass channel top plate, and particularly relates to the technical field of ultra-thin prefabricated slabs, which comprises a concrete slab suitable for an underpass channel top plate, and a plurality of positioning holes are formed in the top end of the concrete slab. A bottom layer steel mesh and a reinforcing steel mesh module which are distributed up and down are arranged in the concrete slab, the bottom layer steel mesh is formed by welding a plurality of first transverse steel bars and a plurality of first longitudinal steel bars in a staggered mode, and the two ends of each first longitudinal steel bar are folded up. The concrete slab serves as a permanent structure of the underpass channel top plate, the apparent quality of concrete can be improved, it can be guaranteed that ribs of the structure are not exposed, meanwhile, positioning holes are reserved, the arrangement distance of main body steel ribs is guaranteed, the formwork erecting time and formwork using time can be shortened, the construction period is shortened, and the construction cost is reduced; and the positioning blocks and the positioning grooves are used for rapid splicing, so that the splicing firmness of the ultrathin prefabricated slab can be improved.

Description

Technical Field

[0001] This utility model relates to the field of ultra-thin precast slab technology, and more specifically to an ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass. Background Technology

[0002] Currently, the construction of the roof slab of the underpass mainly uses scaffolding formwork. However, it is difficult to guarantee the appearance quality of the concrete when using formwork. For the roof slab of the underpass using fair-faced concrete, the appearance quality requirements of the finished concrete are relatively high. When using formwork, it is necessary to use spacers to place the reinforcing bars of the underpass on the formwork.

[0003] Because of the large weight of the reinforcing bars, the concrete spacers are easily crushed. The lack of positioning in the reinforcing bar binding makes it impossible to guarantee the spacing of the reinforcing bars, resulting in insufficient thickness of the concrete cover for the structural reinforcing bars and even quality problems such as exposed reinforcing bars. In addition, the use of scaffolding and formwork leads to long erection time and a large amount of formwork used, which in turn leads to long construction period and high construction cost. Based on this, this utility model provides an ultra-thin precast slab suitable for the top slab of large-volume concrete underpasses, which has high strength, no exposed reinforcing bars, short construction period and low construction cost. Utility Model Content

[0004] To overcome the aforementioned deficiencies of the prior art, this utility model provides an ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass. By using the concrete slab as the permanent structure of the underpass top slab, it not only improves the appearance quality of the concrete but also ensures that the structure does not expose the reinforcing bars. At the same time, it reserves positioning holes to ensure the spacing of the main reinforcing bars, reduces the time and use of formwork, shortens the construction period, and reduces construction costs. Furthermore, by using positioning blocks and positioning grooves for rapid splicing, it can improve the splicing firmness of the ultra-thin precast slab, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass, comprising a concrete slab suitable for the top slab of an underpass, the top of the concrete slab having multiple positioning holes, the interior of the concrete slab having a bottom layer steel mesh and a reinforcing steel mesh module distributed vertically, the bottom layer steel mesh being formed by multiple transverse steel bars and multiple longitudinal steel bars interlaced and welded together, each longitudinal steel bar having both ends folded up, the reinforcing steel mesh module being formed by multiple transverse steel bars and multiple longitudinal steel bars interlaced and welded together, each transverse steel bar and each longitudinal steel bar having both ends folded up, two crossbars connecting the multiple transverse steel bars, and both ends of the crossbars penetrating the concrete slab, the outer wall of the concrete slab having a connecting structure, the connecting structure including multiple positioning blocks, the multiple positioning blocks being fixed to the outer wall of the concrete slab respectively.

[0006] In a preferred embodiment, the number of positioning blocks at the front end and one side of the concrete slab is set to two, and the number of positioning blocks at the rear end and the other side of the concrete slab is set to one. In actual use, the positioning blocks can improve the connection strength of the concrete slab.

[0007] In a preferred embodiment, the outer wall surface of the concrete slab is provided with a plurality of positioning grooves adapted to the positioning blocks. The number of positioning grooves on the front end and one side of the concrete slab is set to one, and the number of positioning grooves on the rear end and the other side of the concrete slab is set to two. Setting the positioning grooves to be inserted with the positioning blocks can improve the firmness of the splicing of two adjacent concrete slabs.

[0008] In a preferred embodiment, a plurality of positioning holes are arranged in a linear array on the top of the concrete slab, and a main steel bar is fixed inside each positioning hole for connecting the concrete slab.

[0009] In a preferred embodiment, square holes are formed between the first transverse steel bar and the first longitudinal steel bar, and between the second transverse steel bar and the second longitudinal steel bar, and the diameter of the square holes is 10cm.

[0010] In a preferred embodiment, the concrete slab is 7cm thick, the bottom of the bottom steel mesh is 2cm away from the bottom of the concrete slab, and the bottom of the reinforcing steel mesh module is 1cm away from the bottom of the bottom steel mesh.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] This utility model uses concrete slabs as the permanent structure of the underpass top slab, which not only improves the appearance quality of the concrete but also ensures that the structure does not expose the reinforcement. At the same time, it reserves positioning holes to ensure the spacing of the main reinforcement bars, and can reduce the formwork erection time and formwork usage, shorten the construction period, and reduce construction costs. Furthermore, the use of positioning blocks and positioning grooves for quick splicing can improve the firmness of the splicing of ultra-thin precast slabs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a structural diagram of the bottom steel mesh of this utility model;

[0015] Figure 3 This is a structural diagram of the reinforced steel mesh module of this utility model;

[0016] Figure 4 This is a top view of the concrete slab of this utility model;

[0017] Figure 5 This is a schematic diagram of multiple concrete slabs being spliced ​​together.

[0018] The attached diagram is labeled as follows: 1. Concrete slab; 2. Positioning holes; 3. Bottom layer steel mesh; 4. Reinforcing steel mesh module; 5. Connecting structure; 6. Main reinforcing steel bars;

[0019] 301. Horizontal reinforcement bar 1; 302. Longitudinal reinforcement bar 1;

[0020] 401. Horizontal reinforcement bar II; 402. Longitudinal reinforcement bar II; 403. Crossbar;

[0021] 501, Positioning block; 502, Positioning groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Refer to the instruction manual appendix Figure 1-5 This utility model provides an ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass, including a concrete slab 1 suitable for the top slab of the underpass, the concrete slab being 7cm thick, the top of the concrete slab 1 having multiple positioning holes 2, the multiple positioning holes 2 being linearly arrayed on the top of the concrete slab 1, and each positioning hole 2 having a main steel bar 6 fixed inside for connecting the concrete slab 1.

[0024] The concrete slab 1 is provided with a bottom steel mesh 3 and a reinforcing steel mesh module 4 distributed vertically. The bottom steel mesh 3 is formed by interlacing and welding multiple transverse steel bars 301 and multiple longitudinal steel bars 302. Both ends of each longitudinal steel bar 302 are folded up. The reinforcing steel mesh module 4 is formed by interlacing and welding multiple transverse steel bars 401 and multiple longitudinal steel bars 402. Both ends of each transverse steel bar 401 and each longitudinal steel bar 402 are folded up. Two crossbars 403 are connected between the multiple transverse steel bars 401, and both ends of the crossbars 403 penetrate the concrete slab 1.

[0025] Square holes are formed between the first transverse steel bar 301 and the first longitudinal steel bar 302, and between the second transverse steel bar 401 and the second longitudinal steel bar 402, with a diameter of 10cm. The bottom of the bottom steel mesh 3 is 2cm away from the bottom of the concrete slab 1, and the bottom of the reinforcing steel mesh module 4 is 1cm away from the bottom steel mesh 3.

[0026] In the process of fabricating concrete slab 1, the bottom steel mesh 3, the reinforcing steel mesh module 4, and the template for concrete slab 1 are first fabricated. The bottom steel mesh 3 and the reinforcing steel mesh module 4 are arranged on the template, and then concrete is poured. At the same time, it is necessary to control the gap between the bottom of the bottom steel mesh 3 and the bottom of the concrete slab 1 to be 2cm, and the gap between the bottom of the reinforcing steel mesh module 4 and the bottom steel mesh 3 to be 1cm. Multiple main reinforcing bars 6 are placed on the template to reserve positioning holes 2 at the top of concrete slab 1. After the pouring is completed, the precast ultrasonic slab can be obtained after the concrete has solidified. The bottom steel mesh 3 consists of multiple transverse reinforcing bars 301 and multiple... The concrete slab 1 is constructed by welding longitudinal reinforcing bars 302, resulting in high strength and load-bearing capacity. This enhances the strength and load-bearing capacity of the concrete slab 1. Furthermore, the reinforcing steel mesh module 4, composed of multiple transverse reinforcing bars 401, multiple longitudinal reinforcing bars 402, and multiple crossbars 403, exhibits high strength and load-bearing capacity, further improving the strength and load-bearing capacity of the concrete slab 1. Consequently, it also enhances the strength and load-bearing capacity of the underpass roof slab. When the concrete slabs 1 are joined, the folded longitudinal reinforcing bars 302, transverse reinforcing bars 401, and longitudinal reinforcing bars 402 are concealed between adjacent concrete slabs 1. In this embodiment, the concrete slab 1 replaces the formwork and serves as part of the permanent structure. This not only improves the appearance quality of the concrete but also ensures that no exposed reinforcing bars appear in the structure. Simultaneously, pre-reserved positioning holes 2 ensure the spacing of the main reinforcing bars 6. The bottom steel mesh 3 and the reinforcing steel mesh module 4 significantly improve the strength of the ultra-thin precast slab.

[0027] Refer to the instruction manual appendix Figure 1-5 The outer wall of the concrete slab 1 is provided with a connecting structure 5. The connecting structure 5 includes a plurality of positioning blocks 501. The plurality of positioning blocks 501 are respectively fixed to the outer wall of the concrete slab 1. The number of positioning blocks 501 at the front end and one side of the concrete slab 1 is set to two, and the number of positioning blocks 501 at the rear end and the other side of the concrete slab 1 is set to one. In actual use, the positioning blocks 501 can improve the connection firmness of the concrete slab 1.

[0028] The outer wall surface of the concrete slab 1 is provided with a plurality of positioning grooves 502 that are adapted to the positioning block 501. The number of positioning grooves 502 on the front end and one side of the concrete slab 1 is set to one, and the number of positioning grooves 502 on the rear end and the other side of the concrete slab 1 is set to two. Setting the positioning grooves 502 to be inserted into the positioning block 501 can improve the firmness of the splicing of two adjacent concrete slabs 1.

[0029] After the concrete is poured, positioning blocks 501 and positioning grooves 502 are formed on its outer side wall. When splicing ultra-thin precast slabs, workers can quickly splice them with the help of positioning blocks 501 and positioning grooves 502. Furthermore, the insertion of positioning blocks 501 and positioning grooves 502 can greatly improve the connection between two adjacent ultra-thin precast slabs, thereby increasing the strength of the underpass top slab.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass, characterized in that: The concrete slab (1) is suitable for the top slab of the underpass. The top of the concrete slab (1) is provided with multiple positioning holes (2). The concrete slab (1) is provided with bottom steel mesh (3) and reinforcing steel mesh module (4) distributed vertically inside. The bottom steel mesh (3) is formed by interlacing and welding multiple transverse steel bars (301) and multiple longitudinal steel bars (302), with both ends of each longitudinal steel bar (302) folded up; The reinforced steel mesh module (4) is formed by interlacing and welding multiple transverse steel bars (401) and multiple longitudinal steel bars (402). Both ends of each transverse steel bar (401) and each longitudinal steel bar (402) are folded up. Two crossbars (403) are connected between the multiple transverse steel bars (401), and both ends of the crossbars (403) penetrate the concrete slab (1). A connecting structure (5) is provided on the outer wall of the concrete slab (1). The connecting structure (5) includes multiple positioning blocks (501), which are respectively fixed on the outer wall of the concrete slab (1).

2. The ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass as described in claim 1, characterized in that: The number of positioning blocks (501) at the front end and one side of the concrete slab (1) is set to two, and the number of positioning blocks (501) at the rear end and the other side of the concrete slab (1) is set to one.

3. The ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass as described in claim 1, characterized in that: The outer wall surface of the concrete slab (1) is provided with a plurality of positioning grooves (502) that are adapted to the positioning block (501). The number of positioning grooves (502) on the front end and one side of the concrete slab (1) is set to one, and the number of positioning grooves (502) on the rear end and the other side of the concrete slab (1) is set to two.

4. The ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass as described in claim 1, characterized in that: Multiple positioning holes (2) are arranged in a linear array on the top of the concrete slab (1), and each positioning hole (2) is fixed with a main steel bar (6).

5. The ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass as described in claim 1, characterized in that: Square holes are formed between the first transverse steel bar (301) and the first longitudinal steel bar (302), and between the second transverse steel bar (401) and the second longitudinal steel bar (402), with a diameter of 10cm.

6. The ultra-thin precast slab suitable for the top slab of a large-volume concrete underpass as described in claim 1, characterized in that: The concrete slab is 7cm thick, the bottom of the bottom steel mesh (3) is 2cm away from the bottom of the concrete slab (1), and the bottom of the reinforcing steel mesh module (4) is 1cm away from the bottom of the bottom steel mesh (3).

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