基于示踪连通试验和流速测试的地下连续墙渗漏研究  

Study of underground diaphragm wall seepage based on hydraulic connectivity tracing and seepage velocity test

作　　者：李奇涛 田野 董海洲[2] 张玉鑫 程梦龙 Li Qitao;Tian Ye;Dong Haizhou

机构地区：[1]中交隧道工程局有限公司,北京100102 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210024

出　　处：《现代城市轨道交通》2022年第3期44-48,共5页Modern Urban Transit

基　　金：国家重点研发计划(2019YFC1510802);江苏高校优势学科建设工程资助项目。

摘　　要：地下连续墙是地铁车站常见的围护结构形式,地下水渗漏会危及基坑稳定和施工安全。采用示踪连通试验和流速测试相结合的探测方法,以某地铁车站地下连续墙为例,在地下连续墙两侧布设钻孔进行地下水连通试验,同时在钻孔中进行示踪流速探测,对探测结果进行对比分析,判断地下连续墙是否存在地下水渗漏,探明隐患的具体位置,并提出防渗处理建议。文章所提出的探测方法可为类似工程提供借鉴和应用。The diaphragm wall,a widely used enclosure structure to prevent groundwater leakage in metro stations under construction,may endanger the stability of foundation pit and construction safety if not maintained properly.Combined detection method including hydraulic connectivity test and seepage velocity measurement was carried out to study the seepage of the underground diaphragm wall at a metro station.In order to determine the existence of groundwater seepage in the underground diaphragm wall and to find out the specific location of the hidden issues,boreholes were laid on both sides of the diaphragm wall to conduct groundwater interconnection tests,and seepage velocity detection by a tracing method was also carried out in the boreholes.The data obtained from both tests were analyzed comprehensively and seepage prevention suggestions were proposed.The combined detection method may apply to solve similar project issues.

关 键 词：地铁车站 地下连续墙 渗漏 连通试验 示踪 渗透流速 

分 类 号：TU753.8[建筑科学—建筑技术科学]