Foundation pit supporting structure of underground continuous wall and construction method for foundation pit supporting structure

Abstract

The invention discloses a foundation pit supporting structure of an underground continuous wall. Two wing plates made of I-shaped profile steel are welded into a steel plate post, the length of the steel plate post is the sum of the design depth of the underground continuous wall and the length of an extended part, a hole is drilled at each of two ends of a unit groove section, the extended parts of the two steel plate posts are arranged in the drilled holes and fixed by pouring concrete, a protecting wall is arranged on each of two sides of the unit groove section, the steel plate posts and the protecting walls are wedged by using wood wedges, two ends of two steel channels are covered on the steel plate posts, a steel bar cage is put into the unit groove section, and two joint boxes are respectively put between the two wing plates outside the two steel plate posts. The concrete is poured into the steel plate posts and the unit groove section till the ground height; and after the concrete is solidified, the wood wedges, the steel channels and the joint boxes are removed, so that the foundation pit supporting structure of the underground continuous wall is formed.

Description

[0001] technical field [0002] The invention relates to a construction method of foundation pit support structure, specifically, an underground continuous wall (hereinafter referred to as ground wall) which is composed of two steel plate column joints and a unit groove section between the steel plate column joints and arranged in a line. The foundation pit support structure and its construction method. Background technique [0003] In order to ensure the smooth construction of the foundation pit and the safety of surrounding underground facilities and buildings, support structures are usually arranged between the foundation pit and the side walls of the foundation pit, and there are various forms of foundation pit support structures. The ground connection wall is a kind of foundation pit support structure, which is currently being used more and more in foundation pit engineering, because the ground connection wall can not only complete the traditional function of the founda...

AI Technical Summary

Problems solved by technology

The increase of the depth of the ground connection wall will cause the following problems: (1) cause the increase of the depth of the reinforcement cage, and the increase of the depth of the reinforcement cage will cause the increase of the cost of the reinforcement material; (2) the increase of the depth of the reinforcement cage will cause the increase of the weight of the reinforcement cage , thereby increasing the cost and risk of hanging the reinforcement cage into the unit groove section; (3) The depth of the reinforcement cage increases, and the depth of the two groove walls of the unit groove section also increases correspondingly. The unevenness of the tank wall increases the possibility that the reinforcement cage cannot be lowered, which will not only slow down the construction speed, but also increase the construction cost

[0006] In order to ensure the safety of the foundation pit itself, the underground facilities around the foundation pit and the ground buildings, reduce the cost of ground connection wall materials and hoisting steel cages, speed up the construction, and reduce the construction cost, a kind of ground that can solve the above three problems is urgently needed. The construction method of the foundation pit support structure of the connecting wall, but there is no construction method of the foundation pit supporting structure of the ground connection wall that can solve the three problems mentioned above

Images