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地下连续墙(以下称地下墙)是轨道交通地下车站基坑围护结构的主要采用形式。目前,地下墙施工与以往有许多不同之处:施工范围覆盖全市,不同地区的水文地质状况差异较大,影响地下墙施工和基坑开挖风险的不良地层有②3、③2、④2、⑤2等,且较为普遍;地下墙的深度也由原来的30m加深到40m,甚至50～60m;另外,车站周边的环境保护要求也越来越高,基坑周边距离建筑物近、管线密集。为了使全面铺开的轨道交通施工顺利进行,本文对地下墙施工中的常见问题进行了系统分析,并提出了行之有效的解决措施。
Underground continuous wall (hereinafter referred to as the underground wall) is the main form of underground excavation retaining structure of the underground station of rail transit. At present, the underground wall construction has many differences with the past: the construction scope covers the whole city, and the hydrogeological conditions vary greatly in different areas. There are ②3, ③2, ④2, ⑤2, etc. in the unfavorable strata affecting the underground wall construction and excavation risk of the foundation pit. , And more common; depth of the underground wall from the original 30m deepened to 40m, or even 50 ~ 60m; In addition, the environmental protection requirements around the station is also getting higher and higher, near the foundation pit near the building, pipeline intensive. In order to carry out the construction of rail transit in full swing, this paper systematically analyzes the common problems in the construction of underground walls and puts forward effective measures to solve the problems.