一种地下连续墙Ⅱ形接头施工新技术

A NEW CONSTRUCTION TECHNOI OGY FOR TYPE-II JOINT OF UNDERGROUND DIAPHRAGM WALL

地下连续墙施工质量的优劣将直接影响基坑安全及永久性支护结构的功能,特别是针对地质条件复杂的深基坑工程,普通的地下连续墙接头施工技术难以满足使用需求,会出现渗漏等问题。为进一步提高地下连续墙施工质量,以上海某深基坑工程为例,介绍了一种在软土地基条件下地下连续墙Ⅱ形接头施工技术,该工艺可以实现接头和槽段的独立施工,最后对实际施工效果进行了检测,结果表明取得良好的施工效果,为以后的地下连续墙接头施工提供了借鉴意义。

The quality of construction of slurry wall will directly affect the safety of foundation pit and the function of permanent support structure.Especially for deep foundation pit projects with complex geological conditions,ordinary construction technology of slurry wall joints can not meet the needs of use,and problems such as leakage will occur.In order to further improve the construction quality of slurry wall,taking a deep foundation pit project in Shanghai as an example,this paper introduces a II-shanped joint construction technology of slurry wall under the condition of soft soil foundation.This technology can realize the independent construction of joints and slots.Finally,the actual construction effect is tested,and the results show that the good construction effect has been achieved,which provides a reference for the joint construction of slurry wall in the future.