Construction method of BDF thin-wall hollow pipe in cast-in-place hollow floor

Abstract

The invention provides a construction method of a BDF thin-wall hollow pipe in a cast-in-place hollow floor, which relates to the technical field of building construction. The construction method comprises the following steps of: building a bent frame, supporting a bottom template, ejecting an embedded pipeline, binding a plate bottom reinforcing steel bar, embedding an electric pipe, arranging a BDF thin-wall hollow pipe, binding a plate surface reinforcing steel bar, building a pioneer road, installing a concrete transporting pipe, blanking concrete, casting and compacting the concrete, maintaining the concrete and disassembling a model; when the BDF thin-wall hollow pipe is arranged, firstly, welding a positioning bracket on the bottom template, and then, fixing a core pipe on the positioning bracket; before building the pioneer road, welding an auxiliary steel net; and before casting and compacting the concrete, firstly, fixing the core pipe, and then, casting and maintaining the concrete. The invention successfully avoids the quality problems of deformation of the plate surface the BDF thin-wall hollow pipe floats and moves when the concrete is cast due to the light and thin BDF thin wall hollow pipe, and the like and eliminates the phenomena of honeycombs, pitted surfaces and holes. The invention can effectively increase the construction quality of the BDF thin-wall hollow pipe in the cast-in-place hollow floor.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an in-situ casting method for a hollow floor. Background technique [0002] BDF thin-walled hollow pipe is a new type of material promoted and applied by the Ministry of Construction. The traditional method is: to weld the support feet or cement pads on the steel mesh in the slab. Because the BDF thin-walled hollow pipe itself is light and thin, the cast-in-place hollow floor The large span and thick board will cause the core pipe to slip during the concrete pouring process, and honeycomb, pitting, and holes will appear in the construction of the hollow floor if there is a slight carelessness; it will also cause the BDF thin-walled hollow pipe to float directly This leads to quality problems such as board arching, which directly affects the quality of the project. Contents of the invention [0003] The object of the invention is to provide a construction method o...

AI Technical Summary

Problems solved by technology

[0002] BDF thin-walled hollow pipe is a new type of material promoted and applied by the Ministry of Construction. The traditional method is: to weld the support feet or cement pads on the steel mesh in the slab. Because the BDF thin-walled hollow pipe itself is light and thin, the cast-in-place hollow floor The large span and thick board will cause the core pipe to slip during the concrete pouring process, and honeycomb, pitting, and holes will appear in the construction of the hollow floor if there is a slight carelessness; it will also cause the BDF thin-walled hollow pipe to float directly Lead to quality problems such as panel arching, which directly affects the quality of the project