CN218952590U

CN218952590U - Prefabricated beam with laminated layer free of formwork supporting

Info

Publication number: CN218952590U
Application number: CN202320083716.7U
Authority: CN
Inventors: 张伟鹏; 郭超; 李庭; 陶国海; 魏晓明; 王权; 周添翔; 张利杰; 吕乐; 卓立; 汪于翔
Original assignee: China Construction Eighth Engineering Division Co Ltd
Current assignee: China Construction Eighth Engineering Division Co Ltd
Priority date: 2023-01-29
Filing date: 2023-01-29
Publication date: 2023-05-02
Anticipated expiration: 2033-01-29

Abstract

The utility model discloses a laminated formwork-free precast beam, which comprises a precast beam body, wherein two sides of the top of the precast beam body are respectively provided with a concrete extension section for plugging a gap between the precast beam body and a floor slab, and the concrete extension sections are arranged along the length direction of the precast beam body in a through-length way, so that the construction efficiency and the construction safety are improved through the precast beam.

Description

Prefabricated beam with laminated layer free of formwork supporting

Technical Field

The utility model relates to the technical field of assembled structures, in particular to a prefabricated beam with a laminated layer and without formwork.

Background

When traditional precast beam coincide layer height is higher than floor thickness, the side of precast beam need use the template to prop up the mould and seal to guarantee that coincide layer position is not leaked thick liquid, but traditional practice has following drawback:

in the aspect of safety, the traditional method adopts a side support template to finish pouring of the height of the superposed beam, and in the construction process, on-site workers are required to ascend, the support template has certain difficulty, and in the construction process, the ascending operation should be mainly operated as a safety measure, so that certain safety risks are caused.

In terms of progress, the traditional method adopts side edge supporting templates, and the effect of template blocking cannot be considered, so that the construction progress is affected to a certain extent.

In the aspect of cost, when the traditional method adopts the traditional template to support the template for reinforcing and plugging, an operation frame body needs to be erected, safety protection measures need to be taken by workers, and safety personnel are used for monitoring by side stations during construction, so that the method has the advantages of multiple procedures and heavy workload, a large amount of template and die frame materials are wasted, and unnecessary economic loss is caused for companies.

In terms of quality, when the traditional method adopts a traditional template to support a template for blocking a beam height difference area, the reinforcing mode is complex, and the problems of template expansion, slurry leakage and the like are caused due to unreasonable reinforcing mode and untight blocking, so that the engineering quality is affected.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, provides a prefabricated beam with a superposed layer and without a formwork, overcomes the defects of the prior art, and has the advantages of safety, progress, cost and quality in all aspects because a concrete extension section is integrally formed on the original prefabricated beam as a plugging section.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the precast beam comprises a precast beam body, wherein two sides of the top of the precast beam body are respectively provided with a concrete extension section for plugging a gap between the precast beam body and a floor slab, and the concrete extension section is arranged along the length direction of the precast beam body.

The utility model relates to a laminated formwork-free precast beam, which is further improved in that the precast beam further comprises an inverted U-shaped precast beam stirrup, and two ends of the inverted U-shaped precast beam stirrup are respectively embedded in two concrete extension sections.

The utility model further improves the laminated formwork-free precast beam, which is characterized in that the number of the inverted U-shaped precast beam stirrups is multiple, and the inverted U-shaped precast beam stirrups are arranged at intervals along the length direction of the concrete extension section.

The utility model further improves the laminated formwork-free precast beam in that the distance between the top of the inverted U-shaped precast beam stirrup and the top surface of the floor slab is not less than 20mm.

Compared with the prior art, the utility model has the advantages that:

1. through setting up at the precast beam top concrete extension section, the difference in height between shutoff floor and the precast beam has avoided the formwork construction of later stage, has improved the efficiency of construction.

2. The stirrups are directly embedded in the concrete extension section, so that no force points are generated when the steel bars are bound later.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a front view of a composite layer formwork-free precast beam of the present utility model.

In the figure: 1. prefabricating a beam body; 2. a concrete extension; 3. inverted U-shaped precast beam stirrups; h1, the height of the precast beam from the bottom surface of the floor slab; h2, floor thickness.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.

The laminated formwork-free precast beam of the present utility model is further described in detail below with reference to the accompanying drawings and specific examples.

Referring to fig. 1, a precast beam with a laminated layer free of formwork support comprises a precast beam body 1, wherein two sides of the top of the precast beam body 1 are respectively provided with a concrete extension section 2 for plugging a gap between the precast beam body 1 and a floor slab, and the concrete extension section 2 is arranged along the length direction of the precast beam body 1.

Specifically, the concrete extension 2 is integrally formed with the precast beam body 1.

Through setting up this concrete extension section 2 at the precast beam top, the difference in height between shutoff floor and the precast beam has avoided the formwork construction of later stage, has improved the efficiency of construction.

Preferably, the concrete extension section further comprises an inverted U-shaped precast beam stirrup 3, and two ends of the inverted U-shaped precast beam stirrup 3 are respectively embedded in the two concrete extension sections 2.

Preferably, the number of the inverted U-shaped precast beam stirrups 3 is plural, and the plural inverted U-shaped precast beam stirrups 3 are arranged at intervals along the length direction of the concrete extension segment 2.

Through pre-burying this inverted U-shaped precast beam stirrup 3, provide the basis for the reinforcement ligature in follow-up coincide district, avoid the later stage to also chisel out concrete extension section 2 and carry out the stirrup and insert.

Preferably, the top of the inverted U-shaped precast beam stirrup 3 is not less than 20mm from the top surface of the floor slab.

The cast-in-situ strength of the superposed layer is ensured by enabling the inverted U-shaped precast beam stirrup 3 to be far from the top surface of the floor slab.

The construction method of the superposed layer of the precast beam is as follows:

the overall structure is deeply designed in advance, and when the height of the cast-in-situ part at the top of the precast beam body 1 (namely the height of the superposed layer) is lower than the thickness H2 of the floor slab, the superposed layer does not need to support a mould at all, and the traditional precast beam body 1 and the precast floor slab are directly hoisted;

when the height of a cast-in-place part at the top of the precast beam body 1 (namely the height of the superposed layer) is higher than the thickness H2 of the floor slab, a gap exists between the floor slab and the precast beam body 1, the height H1 of the precast beam body 1 from the bottom surface of the floor slab is deeply designed, the precast beam body 1 is directly processed in a factory, concrete extension sections 2 with the height H1 are heightened at two sides of the top of the traditional precast beam body 1, meanwhile, inverted U-shaped precast beam stirrups 3 are embedded in the concrete extension sections 2, the precast beam body 1 after the deepening is hoisted to the corresponding position, and then the precast floor slab is hoisted, so that the precast floor slab is contacted with the concrete extension sections 2; binding a reinforcement cage of the laminated layer, and finally casting the laminated layer in situ.

It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present utility model, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present utility model, and should still fall within the scope of the disclosure of the present utility model without affecting the efficacy and achievement of the present utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present utility model can be made by those skilled in the art without departing from the scope of the present utility model.

Claims

1. The utility model provides a precast beam of formwork is exempted from to coincide layer, its characterized in that includes the precast beam body, precast beam body top both sides are formed with a concrete extension section that is used for shutoff in clearance department between precast beam body and the floor respectively, concrete extension section is followed the length direction of precast beam body leads to long setting.

2. The composite formwork-free precast beam of claim 1, further comprising inverted U-shaped precast beam stirrups, wherein two ends of the inverted U-shaped precast beam stirrups are respectively embedded in two of the concrete extension sections.

3. The composite formwork-free precast beam of claim 2, wherein the number of inverted U-shaped precast beam stirrups is plural, and plural inverted U-shaped precast beam stirrups are arranged at intervals along the length direction of the concrete extension section.

4. A composite layer formwork-free precast beam as claimed in claim 2, wherein the top of the inverted U-shaped precast beam stirrup is not less than 20mm from the top surface of the floor slab.