摘要
随着城市地铁建设步伐的加快,轨道交通网络的不断完善,不可避免的会遇到紧邻地铁隧道的基坑工程。这些基坑工程将对地铁的安全运营造成一定的影响。因此,在基坑设计时必须要考虑基坑开挖时对地铁隧道变形的影响程度,合理的选择基坑开挖方式及围护支护形式。文章结合上海地区一个实际基坑工程,该基坑影响到地铁二号线和七号线隧道,运用三维有限元分析方法对各隧道在基坑施工过程中所产生的变形影响进行分析,以对现有的基坑开挖支护设计方案进行复核。分析结果表明现有的设计方案下,基坑对地铁隧道的变形影响符合相应的地铁保护技术标准,能够确保地铁的安全。
With constant perfection of rail transit network, it is inevitable that there are some excavations close to the subway tunnels. These excavations will have some influence on the saiety of subways. Therefore, the deformation effect due to excavating should be considered during designing, so that the reasonable excavating method, enclosure protecting and supporting form can be adopted. According to an excavation project which is close to Metro line No. 2 and No. 7 in Shanghai, the analysis on deformation effect of tunnels during excavation construction is carried out with 3D finite element method. Through numerical simulation the preliminary design scheme is checked. According to the results, the tunnel deformation due to adjacent excavation measures up to the technical standard of suhway protection.
出处
《地下空间与工程学报》
CSCD
北大核心
2010年第A01期1398-1403,共6页
Chinese Journal of Underground Space and Engineering
关键词
基坑工程
隧道
变形
数值模拟
excavation project
tunnel
deformation
numerical simulation
