地铁基坑工程承压水处理技术研究

Study on confined water treatment technology of metro foundation pits

地铁基坑工程中的承压水问题越来越突出,对不同地区地铁基坑进行承压水处理研究已成为地铁基坑施工顺利完成的基础和关键。文章在简述杭州地区承压水分布特性的基础上,系统分析 3 个典型的面临高承压水问题的地铁基坑工程及其工程地质和水文地质条件,研究采用适宜的承压水处理技术方法,保证工程顺利进行。实践表明,在经济合理的前提下,优先考虑将地下连续墙落在相对不透水层上,能有效处理杭州地区地铁基坑工程中的承压水问题。

As the problems of confined water in foundation pit projects become more and more prominent,the treatment of confined water according to local conditions has become the basis and key to ensure the smooth completion of foundation pits engineering.Based on the brief introduction of the characteristics of confined water in Hangzhou,this paper systematically analyzes three typical metro foundation pit projects facing high confined water problems and the engineering geology and hydrogeology conditions.Suitable confined water treatment technologies were studied to ensure the smooth progress of the project.Practice shows that under the premise of economic feasibility,priority should be given to the underground diaphragm wall that is placed on a relatively impervious layer,which can effectively deal with the confined water problem in the subway foundation pits in Hangzhou.