复杂地质条件下地连墙成槽塌孔原因分析及解决办法

Cause Analysis and Solution for the Trough Collapse of the Diaphragm Wall Under Complex Geological Conditions

受复杂地质条件影响,在进行地连墙成槽施工时常会出现塌孔等不利情况。其中,丰富的地下水更是造成泥浆护壁效果不佳的主要原因之一。本文基于苏州某深基坑工程的地连墙施工实例,分析地下水位造成成槽塌孔的具体原因,并提出提高槽内泥浆液面、降低地下水位标高及槽壁加固等具体解决办法,使得地连墙成槽满足设计条件,从而为类似基坑围护工程提供参考。

Due to the influence of complex geological conditions,unfavorable situations such as the trough maybe collapse during the construction of diaphragm wall.Among them,abundant groundwater is one of the main reasons for the poor effect of mud wall protection.Based on the construction example of the diaphragm wall of a deep foundation pit project in Suzhou,this paper analyzes the specific causes of the groundwater level causing the trough collapse,and proposes specific solutions to improve the mud level in the tank,reduce the groundwater level and the wall reinforcement to satisfy the construction conditions of diaphragm wall,thus providing a reference for similar foundation pit engineering.