CN104060738B - Reserved cast-in-situ belt assembled integral concrete floor - Google Patents

Abstract

The invention belongs to the field of civil engineering, and particularly relates to a concrete structure and a fabricated building structure. The reserved cast-in-place belt assembled integral concrete floor slab consists of a precast concrete floor slab and a cast-in-place concrete plate belt. The prefabricated part of the floor slab comprises concrete, and reinforcing steel bars and embedded parts which are arranged in the concrete. The precast concrete slab only needs to reserve the groove or the slab joint with smaller size, improves the prefabrication rate of the floor slab, can reduce the field wet operation, accelerates the field installation speed, enhances the integrity of the floor slab, and simultaneously reduces the thickness of the floor slab and the consumption of concrete by arranging the pipeline in the reserved groove or slab joint, thereby lightening the dead weight of the structure and reducing the earthquake action of the structure.

Description

Reserved cast-in-place with assembled monolithic concrete slab

technical field

The invention belongs to the field of civil engineering, and in particular relates to an assembled building structure and a concrete structure.

Background technique

In the current prefabricated concrete structure, the laminated floor slab has been widely used due to its advantages of reducing the modulus, reducing wet work, improving work efficiency and shortening the construction period. However, in addition to the low prefabrication rate in the factory, the current laminated floor slabs still have the following problems: 1) In order to improve the rigidity and bearing capacity of the prefabricated slab and meet the needs of installation and construction, truss reinforcement is added; The thickness of the overlay layer. For this reason, the amount of concrete and steel bars has increased compared with the cast-in-place slab, the project cost has increased, and the self-weight of the structure has also increased the seismic action of the structure.

Contents of the invention

In order to make up for the defects of existing concrete laminated slabs, the present invention provides a reserved cast-in-place belt assembly with the same slab thickness as the cast-in-place concrete floor slab, higher prefabrication rate, stronger integrity, less concrete consumption, and lighter structure weight Integral floor.

In order to solve the above-mentioned key technical problems, the present invention is achieved by the following scheme:

The reserved cast-in-place belt assembly integral concrete floor is composed of two parts: prefabricated concrete floor and cast-in-place concrete slab belt. The precast concrete floor includes concrete and its internal reinforcement and embedded parts. Concrete forms cast-in-place concrete slab strips.

The advantages of the present invention are: only small grooves or slab seams need to be reserved for assembling the integral concrete floor slab with cast-in-place belts, which improves the prefabrication rate of the floor slab, reduces on-site wet work, speeds up on-site installation speed, and enhances The integrity of the floor is improved. At the same time, by laying pipelines in the reserved grooves or slab seams, the thickness of the floor is reduced, the amount of concrete is reduced, and the self-weight of the structure is reduced, and the seismic action of the structure is reduced.

(4) Description of drawings

Accompanying drawing 1 and accompanying drawing 2 are the schematic diagrams of the present invention, and wherein accompanying drawing 1 is the floor slab whose design thickness is not less than 140mm, and accompanying drawing 2 is the floor slab whose design thickness is less than 140mm.

(5) Specific implementation methods

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

In the present invention, for a floor slab with a design thickness of not less than 140mm, it is split into plates not greater than 1200mm*1200mm, grooves are reserved between the plates, and the steel bars in the grooves run through, and the prefabricated part is made by factory or nomadic mold. Concrete is poured into the groove to form an assembled monolithic concrete floor. The thickness of the concrete slab under the groove is not less than 60mm, and the height of the groove is not less than 80mm, as shown in Figure 1.

For floor slabs with a design thickness less than 140mm, split them into slabs of no more than 1200mm*1200mm, reserve slab seams with a width of 100mm-300mm between the slabs. The assembled integral concrete floor is formed by pouring concrete at the reserved slab joints on site, as shown in Figure 2.

When manufacturing in the factory, use the corresponding mold to reserve the position of the cast-in-place belt according to the relevant parameters of the design, install the formwork, arrange the reinforcement and pour the concrete. After the prefabricated part of the present invention is manufactured in the factory, the prefabricated slabs on both sides of the reserved cast-in-place belt are fixed by the rigid support of the prefabricated slab, and they are lifted and installed after being transported to the site. After the pipeline is laid, the reserved slab joints or grooves are poured on-site to form a cast-in-place belt to form an assembled integral concrete floor.

Claims (1)

1. Reserved cast-in-place belt assembly integral concrete floor is composed of prefabricated concrete floor and cast-in-place concrete slab belt. It is characterized in that the precast concrete floor includes concrete and its internal reinforcement and embedded parts. Concrete is poured on site at the pouring belt to form a cast-in-place concrete slab belt. For a floor slab with a design thickness of not less than 140mm, it is split into slabs of no more than 1200mm*1200mm. Grooves are reserved between the slabs, and the thickness of the concrete slab below the groove is not less than 60mm. The height of the groove is not less than 80mm, and the steel bars in the groove run through; for the floor slab with a design thickness of less than 140mm, it is divided into plates not greater than 1200mm*1200mm, and a plate gap with a width of 100mm-300mm is reserved between the plates, and the steel bars between the plate gaps through.