CN218952550U

CN218952550U - Steel bar truss concrete pressing groove precast floor slab without bar discharging

Info

Publication number: CN218952550U
Application number: CN202223003389.4U
Authority: CN
Inventors: 米宗宝; 李国发; 张涛; 刘阳; 刘承灵; 朱记伟
Original assignee: Xian University of Technology; China Construction Fourth Engineering Division Corp Ltd
Current assignee: Xian University of Technology; China Construction Fourth Engineering Division Corp Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-05-02
Anticipated expiration: 2032-11-10

Abstract

The utility model discloses a steel bar truss concrete pressing groove precast floor slab without ribs, which comprises a precast floor slab body which is integrally rectangular, wherein a plurality of grooves are distributed on the edge of the surface of the precast floor slab body, web-like steel bars are arranged in the grooves, lower chord steel bars are arranged in the precast floor slab body close to four edges, the bottoms of the lower chord steel bars are abutted with a plurality of span direction steel bars, and the web-like steel bars are fixedly connected with the span direction steel bars. According to the utility model, through the design of the web member-like steel bars in the grooves, the reinforcement is not arranged around the precast floor slab, the interference with the reinforcement of the beams and columns around during the installation of the floor slab is avoided, the construction process is optimized, and meanwhile, the corner loss and the surface damage caused by the lack of the edges of the precast floor slab concrete member are avoided. In addition, after the floor slab is installed in place, the bottom of the floor slab is not required to be supported with excessive brackets and fixing devices, so that the use cost of a large number of templates can be saved.

Description

Steel bar truss concrete pressing groove precast floor slab without bar discharging

Technical Field

The utility model belongs to the technical field of building assembly, and particularly relates to a reinforced truss concrete indent precast floor slab without ribs.

Background

In recent years, the prefabricated laminated slab has the advantages of cast-in-situ slab and prefabricated slab in a whole by virtue of the advantages of the prefabricated laminated slab, namely, the integral anti-seismic performance is good, the component forming effect is good, the construction speed is high, the field wet operation is less, and the like, and the prefabricated laminated slab is remarkable in the components such as the prefabricated shear wall, the prefabricated bay window, the prefabricated beam, the prefabricated column and the like, and is popular in the current society of building industrialization.

The traditional reinforced truss concrete precast floor slab has the following defects: the steel bar truss concrete precast floor slab is not fully considered in the design, namely a huzi bar is also called as a huzi bar, and is frequently interfered with an anchoring steel bar and a beam bar in the hoisting construction; the construction site is mainly formed by binding columns and beam steel bars firstly and then placing the traditional reinforcement-discharging precast floor slab, and the traditional reinforcement-discharging precast floor slab is installed on the construction site in such a way that the beard steel bars extending out of the precast slab ends are bent or the beam steel bars are pried to shift, so that the construction efficiency is seriously affected and the strength of the steel bars is reduced; and resetting, checking and rechecking the beam ribs after the precast floor slabs are installed in place, so that the extra workload of a reinforcing steel bar worker is necessarily increased. Therefore, how to produce the steel bar truss concrete precast floor slab with no ribs on four sides through the process improvement has important value significance for improving the site construction efficiency and the component quality.

Disclosure of Invention

The utility model aims to provide a steel bar truss concrete pressing groove precast floor slab without a reinforcement, which solves the problem that the end portion of the traditional reinforcement precast floor slab is seriously collided with column and beam steel bars in the installation process, so that the construction efficiency and the strength of the steel bars are affected.

The technical scheme includes that the prefabricated floor slab with the steel bar truss concrete pressing groove without the ribs comprises a prefabricated floor slab body which is rectangular overall, a plurality of grooves are distributed on the edge of the surface of the prefabricated floor slab body, web-like steel bars are arranged in the grooves, lower chord steel bars are arranged in the prefabricated floor slab body and close to four edges, the bottoms of the lower chord steel bars are abutted to a plurality of span direction ribs, and the web-like steel bars are fixedly connected with the span direction ribs.

The utility model is also characterized in that:

the prefabricated floor slab body is fixedly connected with a plurality of truss steel bars which are parallel to each other, the bottom of each truss steel bar is wrapped inside the prefabricated floor slab body, and the top of each truss steel bar is exposed out of the prefabricated floor slab body.

Grooves distributed on the edges of the surface of the prefabricated floor slab body are symmetrically distributed on opposite sides.

The groove density of the long side of the prefabricated floor slab is higher than that of the short side.

The lower chord steel bars are parallel to the arrangement direction of the grooves, are parallel to the surface of the prefabricated floor slab body, and are perpendicular to the span direction steel bars.

The web member-like steel bars are in an inverted V shape, and the bottoms of the web member-like steel bars are fixedly connected with two span direction steel bars.

The beneficial effects of the utility model are as follows:

1. according to the utility model, through the design of the web member-like steel bars in the grooves, the reinforcement is not arranged around the precast floor slab, the interference with the surrounding beam steel bars is avoided during the installation of the floor slab, the construction process is optimized, and meanwhile, the corner loss and the surface damage caused by the lack of the edges of the precast floor slab concrete members are avoided.

2. The utility model can save a great amount of templates and can play the role of cast-in-place concrete templates by the lower plate body of the precast floor slab.

3. The web member-like steel bars of the pressed-in prefabricated floor slab are removed on the basis of the web member steel bars, the bent top parts of the web member steel bars and the bearing steel bars passing through the joints of the beam steel bars are bound and fixed, and the bent top parts of the web member steel bars are hinged with the joints of the beam steel bars and can bear the load after the pressed-in prefabricated floor slab is hoisted and installed.

4. Compared with the existing reinforcement-out precast floor slab in the market, the reinforcement-out precast floor slab has the advantages that the reinforcement-out precast floor slab is replaced by the grooves, web member-like reinforcements and the load-bearing reinforcements at the joint by the application of the grooves, the traditional manner of penetrating and anchoring the reinforcing steel bars of the beam and the reinforcing steel bars of the beam is omitted, the re-inspection of the reinforcing steel bars of the beam is reduced, and the construction efficiency is greatly improved.

5. When the pressing groove precast floor slab is hoisted and installed, the pressing groove precast floor slab can be slowly placed from the upper part in a vertical hoisting mode, and then the bearing steel bars at the spliced part pass through the beam steel bars and the web member-like steel bars, so that the pressing groove precast floor slab can reach a proper installation position without moving left and right in the process.

Drawings

FIG. 1 is a schematic diagram of a concrete pressed channel precast floor slab of a steel bar truss without reinforcement;

FIG. 2 is a schematic diagram of a groove in a concrete pressed groove precast floor slab of a steel bar truss without reinforcement according to the present utility model;

FIG. 3 is a schematic cross-sectional view of a precast floor slab body in a reinforced truss concrete indent precast floor slab without reinforcement according to the present utility model;

FIG. 4 is a schematic diagram of a splicing structure of a steel bar truss concrete indent precast floor slab without reinforcement;

FIG. 5 is a schematic view of the structure at A in FIG. 4;

FIG. 6 is a schematic structural view of a conventional four-sided reinforced truss concrete composite slab in the prior art;

in the figure, the prefabricated floor slab body is 101, the groove is 102, the web member-like steel bar is 103, the joint bearing steel bar is 104, the beam steel bar is 105, the truss steel bar is 106, the span direction steel bar is 107, the lower chord steel bar is 108, and the wire binding steel bar is 109.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description.

As shown in fig. 1, 2 and 3, the steel bar truss concrete indent precast floor slab without ribs comprises a precast floor slab body 101 which is rectangular as a whole, wherein the precast floor slab body 101 is made of concrete, a plurality of grooves 102 are distributed on the edge of the surface of the precast floor slab body 101, the precast floor slab is simplified to be installed, the labor cost is reduced, web-like steel bars 103 are arranged in the grooves 102, the web-like steel bars 103 are similar to web-like steel bars in truss steel bars 106 in structure, and the web-like steel bars are not provided with upper chord bars only because the size of the web-like steel bars is different from that of the web-like steel bars, so the web-like steel bars 103 are called. The lower chord steel bars 108 are arranged in the precast floor slab body 101 and close to four edges, the lower chord steel bars can be used as stress bars at the lower part to bear the slab body and other external loads, the bottoms of the lower chord steel bars 108 are abutted with a plurality of span direction steel bars 107, tension and compression from the precast floor slab body 101 and other external loads can be resisted, the web-like steel bars 103 are fixedly connected with the span direction steel bars 107, the precast floor slab body 101 is fixedly connected with a plurality of truss steel bars 106 which are parallel to each other, the truss steel bars 106 can be used as stirrups for reinforcing steel mesh steel bar arrangement, a steel bar protection layer is controlled, hanging points can be provided when the precast floor slab is transported and assembled and disassembled, the transportation and assembly and disassembly of the precast floor slab are convenient, the shearing bearing capacity on the interface of a post-cast layer and the precast floor slab can be enhanced, and due to the supporting effect of the truss steel bars 106, various supports in the lower construction stage of the precast floor slab body 101 can be properly reduced, and huge cost brought by supporting, cast-in-place concrete and reinforced concrete templates can be greatly reduced.

The lower parts of the web-like steel bars 103 and the truss steel bars 106 are wrapped in the precast floor slab body 101, only the upper end parts of the web-like steel bars 103 and the truss steel bars 106 are exposed, and grooves 102 distributed on the edge of the surface of the precast floor slab body 101 are symmetrically distributed on opposite sides.

The grooves 102 on the long side of the precast floor plank 101 are denser than the grooves 102 on the short side to carry the load from the plank.

The lower chord steel bars 108 are parallel to the arrangement direction of the grooves 102, the lower chord steel bars 108 are parallel to the surface of the precast floor plank body 101, and the lower chord steel bars 108 are perpendicular to the span direction steel bars 107.

The web member-like steel bar 103 is in an inverted V shape, and the bottom of the web member-like steel bar 103 is fixedly connected with two span direction steel bars 107.

As shown in fig. 4 and 5, when two steel bar truss concrete pressing groove precast floor slabs without ribs are spliced, the spliced part bearing steel bars 104 pass through the beam steel bars 105 and the web member-like steel bars 103, the spliced part bearing steel bars 104 bear the stress of the pressing groove precast floor slabs after pouring and play a role of hinges, the spliced part bearing steel bars 104 are positioned below the longitudinal steel bars at the upper part of the spliced part beam steel bars 105, stirrups of the beam steel bars 105 are distributed at the left and right sides of the spliced part, the connecting structure at the beam steel bars 105 is stable, the beam steel bars 105 are steel bars arranged around when the pressing groove precast floor slabs are installed, the beam steel bars 105 are divided into upper longitudinal steel bars, lower longitudinal steel bars and stirrups, the span direction steel bars 107 are positioned in the precast floor slab body 101 to bear the pulling pressure from the floor slabs and the loads, and the lower chord steel bars 108 are truss steel bars 106 and the lower welding steel bars. When the prefabricated slab is used, the prefabricated slab is placed in the hole of the slab in the design, the bearing steel bars 104 at the joint pass through the middle part of the beam steel bars 105 and are bound and fixed with the web member-like steel bars 103 by the wire binding steel bars 109, so that the prefabricated slab can be installed.

When the pressed slot precast floor slab is spliced, the arrangement mode of the bearing steel bars 104 at the spliced part is as follows: after the support below the pressed groove precast floor slab is installed completely, selecting proper positions of truss steel bars 106 on the precast floor slab body 101 as hanging points to install the precast floor slab from top to bottom, fully distributing beam steel bars 105 around the installation positions, enabling the load-bearing steel bars 104 at the splicing positions to pass through the beam steel bars 105 from one side below the upper longitudinal bars and to be installed under the web-like member steel bars 103, and finally binding with binding steel bars 109, thereby completing the installation of the load-bearing steel bars 104 at the splicing positions.

As shown in fig. 6, the beard bars of the conventional steel bar truss concrete precast floor slab extend from four sides of the slab body from span direction bars and width direction bars inside the slab body of the precast floor slab, wherein the beard bars with hooks remain on the longer side of the slab body of the precast floor slab. The problem that the extending beard ribs interfere with the surrounding beam steel ribs can be faced when the traditional reinforced truss concrete precast floor slab is installed, so that workers need to pry the surrounding beam steel ribs when the traditional reinforced truss concrete precast floor slab is installed so as to ensure that the reinforced precast floor slab can be installed smoothly, and labor cost is increased when construction efficiency is reduced.

The utility model provides a steel bar truss concrete pressing groove precast floor slab without ribs, which comprises the following using processes:

the use process of the utility model relates to the installation of the precast floor plank body 101 and the spliced position bearing steel bars 104, wherein the spliced position bearing steel bars 104 connect the precast floor plank bodies 101 at the two sides of the beam steel bars 105 together. The design purpose of the groove 102 and the web member-like steel bars 103 is to avoid the problems that the construction efficiency is affected and the safety of the beam steel bars 105 is difficult to ensure due to interference between four sides Hu Zijin and the beam steel bars 105 when the traditional reinforcement-out precast floor slab is installed.

In the actual installation process, the upper longitudinal bars bound by the beam steel bars 105 are not required to be pried by using a crow bar, so that the installation steps are simplified, the recovery and rechecking of the upper longitudinal bars of the beam steel bars 105 are avoided, and the mechanical structure at the beginning of the design is ensured; the utility model relates to a reinforced truss concrete pressing groove precast floor slab without ribs, wherein the four sides of the precast floor slab are not extended with reinforcing steel bars, and the pressing groove precast floor slab with corresponding size can be directly customized according to the size of a reserved plate hole calculated according to a construction drawing during construction and installation; on the basis of keeping the advantages of the traditional reinforcement-out precast floor slab, the utility model completely replaces the function of the beard ribs by the grooves 102, the web-like steel bars 103 and the load-bearing steel bars 104 during splicing, and the installation is not limited by the four-side beard ribs; the web member-like steel bar 103 has perfect manufacturing process, detailed manufacturing process and simple manufacturing process, and the aim of splicing two precast floor slabs with the pressing grooves can be achieved by matching the web member-like steel bar with the bearing steel bar 104 at the splicing position; the prefabricated floor slab body 101 is made of concrete, the web member-like steel bars 103, the spliced bearing steel bars 104, the beam steel bars 105, the truss steel bars 106, the span direction steel bars 107, the lower chord steel bars 108 and the wire binding steel bars 109 are made of steel bars, the materials involved are not different from those of the traditional reinforcement-out prefabricated floor slab, but the installation process is simpler and more convenient than the former, the traditional cast-in-situ floor slab has complex process, material consumption and slower construction speed, the prefabricated floor slab only needs temporary installation, and the construction speed is high.

Claims

1. The utility model provides a do not go out steel bar truss concrete indent precast floor slab of muscle, its characterized in that, including whole precast floor slab board body (101) that is the rectangle, precast floor slab board body (101) surface edge distributes has a plurality of recesses (102), be equipped with class web member reinforcing bar (103) in recess (102), be close to four limit departments in precast floor slab board body (101) and all be equipped with chord steel bar (108) down, chord steel bar (108) bottom butt has a plurality of span direction muscle (107) down, class web member reinforcing bar (103) and span direction muscle (107) rigid coupling.

2. The steel bar truss concrete indent precast floor slab without reinforcement according to claim 1, wherein the precast floor slab body (101) is fixedly connected with a plurality of truss steel bars (106) which are parallel to each other, the bottom of the truss steel bars (106) is wrapped inside the precast floor slab body (101), and the top of the truss steel bars (106) is exposed out of the precast floor slab body (101).

3. A reinforced truss concrete pressed channel precast floor slab without ribs according to claim 1, wherein a plurality of said grooves (102) are arranged symmetrically on opposite sides.

4. The steel bar truss concrete indent precast floor slab without ribs as claimed in claim 1, wherein the groove (102) density of the long side of the precast floor slab body (101) is higher than the groove (102) density of the short side.

5. The steel bar truss concrete indent precast floor slab without reinforcement according to claim 1, wherein the lower chord steel bars (108) are parallel to the arrangement direction of the grooves (102), the lower chord steel bars (108) are parallel to the surface of the precast floor slab body (101), and the lower chord steel bars (108) are perpendicular to the span direction steel bars (107).

6. The steel bar truss concrete indent precast floor slab without reinforcement according to claim 1, wherein the web-like steel bars (103) are in an inverted V shape, and the bottoms of the web-like steel bars (103) are fixedly connected with two span direction bars (107).