Polystyrene square box core mold construction method for hollow floor system

Abstract

The invention particularly relates to a polystyrene square box core mold construction method for a hollow floor system. The polystyrene square box core mold construction method is characterized by comprising the following steps that an anti-floating device is prepared; the bottom concrete is vibrated, and the anti-floating effect is improved; after a supporting frame and a formwork are installed, an iron wire penetrates into the formwork; rebars at the bottoms of core molds are bound, core mold cushion blocks are arranged, and four cushion blocks are placed on each core mold; a polystyrene core mold is installed; a permanent fixing device is installed; an anti-floating device is installed; concrete is poured; and after the concrete is poured to the top surface of a box, the foam box and the concrete are in full contact and generate full adsorption force, the iron wire is cut off, and an anti-floating positioning device is disassembled. The forming quality of concrete at the bottom of the core mold is better; the core mold is provided with a through hole, bottom concrete is vibrated through the through hole, concrete hydration heat dissipation is facilitated, and the quality of the concrete at the bottom of the core mold can be effectively controlled. Meanwhile, compared with the prior art, operation is flexible, and installation and disassembly are convenient; and the auxiliary anti-floating device is detachable and can be reused.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for a polystyrene square box mandrel used for a hollow floor. Background technique [0002] The cast-in-place hollow floor is made of light materials arranged in a certain order and replaces part of the concrete of the solid floor to form a cavity or a lightweight sandwich, so that it forms a cavity and hidden ribs to form a space honeycomb stress structure. One of the floor technologies. This technology reduces the weight of the floor and maintains most of the rigidity and strength of the floor. It is a building structure system with reasonable performance and price, which is more in line with the modern high-tech level. [0003] Among the many mandrels for hollow-core slabs, polystyrene mandrels are widely used in engineering because of their light weight, low cost, easy transportation, and good thermal insulation effects. However, due to the relativ...

AI Technical Summary

Problems solved by technology

However, in the actual construction process, when the concrete is poured, the buoyancy of the mandrel is too large, and the iron wire will still break, which will cause the mandrel to float up, and then cause the upper concrete layer or the rib beam to be too thin. Improper control will seriously affect the quality of concrete pouring , and even produce quality accidents

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