基坑开挖渗流对临近地铁影响的数值分析
摘要:运用MIDAS/GTS软件的渗流分析功能,采用渗流-应力耦合的计算方法,针对深基坑开挖地下水渗流对临近地铁结构的影响进行二维数值分析。得出结论:近地铁侧深基坑采用"地连墙+内支撑+止水帷幕"的支护及止水方式,能有效控制土方开挖过程中地下水渗流引起的地铁结构沉降;隧道底部孔隙水压减小量、隧道底部最大沉降量均随基坑开挖深度的增加呈抛物线趋势发展。
Abstract:Based on the computing method of seepage-stress coupling and seepage analysis function of MIDAS/GTS, two-dimensional Numerical analysis of effect of water seepage in foundation pit near metro structure is study in this paper. The results are the method of "diaphragm wall+ inner support+ waterproof curtain" used in foundation pit support near to metro, can control subway sedimentation caused by water seepage during excavation effectively. Moreover, pore water pressure reduction and maximum sedimentation of the bottom of tunnel present parabolic trend with increasing excavating depth.
中文标题：
基坑开挖渗流对临近地铁影响的数值分析
Numerical Analysis on Effect of Water Seepage in Foundation Pit Nearby Metro
作者：
曾庆国,徐剑敏
Ceng Qingguo,Xu Jianmin
作者简介:曾庆国,1982年生,男,汉族,硕士研究生,主要从事岩土工程设计及咨询工作。E-mail:Macaulish1314@yahoo.com.cn
通讯地址：
深圳市市政设计研究院有限公司, 广东深圳 518029
ShenzhenMunicipalDesign&ResearchInstituteCo,Ltd,Shenzhen518029,Guangdong,China
中图分类号:TU441.33;TU311.4
doi:10.3969/j.issn.1007-2993.2013.04.006
出版物：岩土工程技术
收稿日期:2013-04-18
关键词:基坑,渗流,地铁,二维数值分析
Key words:foundation pit,seepage,metro,two-dimensional numerical analysis
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