强透水砂层地质地铁车站降水施工技术应用研究

A Study on Application of Precipitation Construction Technology of Subway Stations with Geology of Strong Permeable Sand Layer

在富水砂层强透水地质环境下进行地铁建设施工时,容易受地下水影响,特别是在基坑开挖过程中容易引起地表沉降、地下连续墙和基坑坍塌等一系列风险,合理的降水设计和施工质量是项目安全的保障。基于此,本文以呼和浩特市阿尔山路地铁车站项目为依托,在简要介绍该工程的主要施工环境和水文地质条件的基础上,详细地阐述和分析了在富水砂层强透水地质环境下的降水实施技术,并列举了在实际工程中的相关施工参数和关键控制点,以期可以进一步促进降水施工技术的发展。

When in the construction of subway in watery sandy stratum with strong permeable geology,it is easy to be affected by groundwater,especially in the excavation of foundation pit,it will cause the risks of surface subsidence,underground continuous wall and foundation pit collapse,etc,so the reasonable drawdown design and construction quality are the guarantee of project safety.Based on this,this paper take the Hohhot City Alshan Road subway station project as the example,except introducing the construction environment and hydrogeological conditions of project briefly,also expounding and analysing the precipitation implementation technology in watery sandy stratum with strong permeable geology,and enumerating the relevant construction parameters and key control points in practical engineering,in order to further promote the development of precipitation construction technology.