摘要
针对北京地铁5号线折返线区间典型断面群洞效应进行有限元分析，比较了不同开挖情况下洞室的有效应力和地面沉降，得出较为合理和快捷可行的施工方案。
Using finite element, this paper analyzing the turn back line typical section Group-effect of the Beijing Subway Line 5, comparing the effective stress and land subsidence when there was in different excavation, and getting more reasonable and feasible construction plan.
关键词
折返线区间
群洞效应
施工优化
Turn back line
Group-effect
Construction optimization.
