Method for handling dangers of cement-earth gravity-type enclosure wall in soft soil area

Abstract

The invention discloses a method for handling dangers of a cement-earth gravity-type enclosure wall in a soft soil area, and belongs to the field of civil building engineering construction technologies. The method comprises the following steps: unloading an active area of a foundation pit to reduce water-earth pressure of the active area of the foundation pit; exerting a counter pressure to a passive area of the foundation pit to increase the resistance of the passive area; limiting a construction load; taking filling and repairing measures in a timely manner for cracks in a capping plate and a wall body of the cement-earth gravity-type enclosure wall; reinforcing the cement-earth gravity-type enclosure wall, controlling earthwork excavation, and quickly forming a rigid support-changing mechanism. Through a series of measures, foundation pit accidents, such as instability, slip and collapse, caused by deterioration of dangers such as deformation, cracking and leakage in an enclosure section of the cement-earth gravity-type enclosure wall during foundation pit excavation in a muddy soft soil layer can be prevented, so that safe and smooth implementation of foundation pit engineering are ensured.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to a method for treating dangerous situations of cement-soil gravity-type enclosure walls in soft soil areas. Background technique [0002] As one of the world's three major cities with soft soil foundations, Shanghai has deep soft soil layers, shallow groundwater levels, and sensitive and complex environmental conditions; foundation pit excavation and support are comprehensive, with great uncertainty and high system risk. According to years of engineering experience in Shanghai, the most commonly used enclosure type for excavating foundation pits within a depth of 5m in soft soil areas is the cement-soil gravity enclosure wall. Cement-soil gravity retaining wall is a kind of retaining and water-stop structure, which is a kind of soil-retaining and water-stop structure, which has a certain thickness and embedding depth after reinforcing the foundation soil wit...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of method for treating the dangerous situation of cement-soil gravity type retaining wall in soft soil area, to solve the problem of deformation and cracking of the cement-soil gravity type retaining wall in the foundation pit construction of existing muddy soft soil stratum. , leakage and other dangerous conditions worsen and cause foundation pit accidents

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