某工程建设对成都地铁2号线隧道的安全性影响评估  

Assessment of the influence of engineering construction on Chengdu Metro Line 2 tunnel

作　　者：凌程建[1] 葛庆子[1] 肖承波[1] 张敬一[1] LING Chengjian GE Qingzi XIAO Chengbo ZHANG Jingyi(Sichuan Institute of Building Research,Chengdu 610081, China)

机构地区：[1]四川省建筑科学研究院,四川成都610081

出　　处：《四川建筑科学研究》2017年第5期44-49,共6页Sichuan Building Science

基　　金：华西集团科技项目(HXKX2014/012)

摘　　要：成都市某工程地下结构部分上跨已运营的成都地铁2号线盾构隧道,其基坑上跨段地质条件复杂,且有部分地下两层基坑已施工完成。针对该工程深基坑与邻近地铁隧道之间的相互影响分析,应用有限元建立了岩土-结构整体计算模型,对工程基坑及上部结构施工对隧道安全性的影响进行了评估。为减小基坑变形对地铁的影响,从安全可靠、经济合理的方面出发,提出了针对措施及建议,供类似工程参考。An underground engineering passes over the existing shield-driven tunnel of the Chengdu Metro line 2. Due to the complex geological conditions and surrounding environment of the over-passing section,part of the foundation pit has been finished. Based on a deep excavation adjacent to subway station, using finite element method, a model for soil-structure interaction is established. In order to reduce the influence of excavation deformation on the subway, the relevant measures and suggestions are put forward considering the safe, economic and reasonable characteristics. It may provide a reference for similar projects.

关 键 词：基坑 盾构隧道 上跨地铁 有限元分析 结构变形 

分 类 号：U231[交通运输工程—道路与铁道工程]