Construction method of cover-and-cut reverse construction concrete walls and columns with vertical structures

Abstract

The invention discloses a construction method of cover-and-cut reverse construction concrete walls and columns with vertical structures. The construction method comprises the following steps that a top plate is constructed, a lower returnable segment is arranged in the position of the top plate corresponding to a lower-layer wall and column, and sleeves and overlap-connected steel bars are reserved in the lower returnable segment; after the top plate is constructed, a layer of soil is excavated downwards from the top plate, wall and column steel bars are bound, and then, are connected to the overlap-connected steel bars, and a bottom plate is constructed; after the bottom plate is constructed, wall and column templates are supported to be closely attached to the lower returnable segment; and walls and columns can be formed by pouring concrete downwards in the sleeves reserved in the lower returnable segment. According to the invention, the construction method solves the problem that cover-and-cut reverse construction concrete walls and columns form a horn mouth shape in a supporting mode, or the construction process of a post filling method is complex, and the compactness of concrete in joints is difficult to control. The construction method reduces the construction difficulty, ensures the construction quality and accelerates the construction progress.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a construction method for vertical structural concrete walls and columns with cover and excavation. Background technique [0002] There are generally two types of construction for vertical concrete walls and columns with cover excavation and reverse construction: the first method is to set the upper opening of the front wall and column formwork into a bell mouth shape after returning to a certain height, and pour the walls and columns from the bell mouth. Concrete, after the concrete is solidified, chisel away excess concrete at the bell mouth and repair it to make it smooth. Although this method can better solve the concrete density of the upper joint, the formwork support is complicated, and the excess concrete at the bell mouth needs to be chiseled and repaired to make it smooth , the appearance quality is poor; the second is to pour the concrete of the main wall and co...

AI Technical Summary

Problems solved by technology

[0002] There are generally two types of construction for vertical concrete walls and columns with cover excavation and reverse construction: the first method is to set the upper opening of the front wall and column formwork into a bell mouth shape after returning to a certain height, and pour the walls and columns from the bell mouth. Concrete, after the concrete is solidified, chisel away excess concrete at the bell mouth and repair it to make it smooth. Although this method can better solve the concrete density of the upper joint, the formwork support is complicated, and the excess concrete at the bell mouth needs to be chiseled and repaired to make it smooth , the appearance quality is poor; the second is to pour the concrete of the main wall and column to a certain distance from the lower concrete after the walls and columns are lowered to a certain height, and then fill them with a higher grade of micro-expansion concrete or press-in cement slurry. This method requires multiple constructions, there are many concrete construction joints, the density of the post-fill material is difficult to control, and the quality of the concrete is difficult to control

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