深基坑开挖对临近既有地铁隧道的影响分析与对策  

Numerical Analysis and Countermeasures for Influence of Deep Excavation on Adjacent-to-subway Tunnels

作　　者：裴行凯[1] 倪小东[1] 

机构地区：[1]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《水利与建筑工程学报》2013年第3期45-48,共4页Journal of Water Resources and Architectural Engineering

基　　金：教育部博士科研基金(20110094120002)

摘　　要：结合上海宝庆路临近地铁7号线某深基坑工程的设计方案,利用数值模拟的方法动态预测深基坑开挖对临近既有地铁隧道的影响,并对地铁保护方案进行模拟对比分析;为防止地下连续墙开挖造成过大的位移,预先采用三轴水泥土搅拌桩进行槽壁加固,并对坑底加固强度进行对比分析,发现对基坑底部土体进行加固可有效抑制临近隧道的变形,但应注意选择最优化的加固强度。Based on the design proposal of one deep foundation pit excavation project near Shanghai Subway Line No. 7 in Baoqing Road, the dynamic effects of the deep excavation on the tunnel near existing underground railway am predicted by the numerical analysis with finite element software ABAQUS, and the numerial comparison and analysis are carried out for the protecting schemes of the subway. In order to prevent the excessive displacement from continuous wall excavation, the triaxial concrete-mixing pile will be used to strengthen the trench wall and the bottom of the excavation. After comparison, it is found that these strengthening measures can prevent the deformation of the adjacent-to-subway tunnel effectively, but the special attention is required to the choosing for optimized reinforcing strength.

关 键 词：基坑开挖 有限元分析 盾构隧道 临近地铁隧道 

分 类 号：TU924[建筑科学—建筑设计及理论]