特大型深基坑开挖过程的变形计算与内力分析  

Deformation calculation and internal force analysis of super-large deep excavation

作　　者：徐伟[1] 时春霞[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《岩土工程学报》2008年第S1期1-4,共4页Chinese Journal of Geotechnical Engineering

基　　金：广东省交通厅建设科技项目广州珠江黄埔大桥悬索桥锚碇设计与施工技术研究课题

摘　　要：某特大型深基坑,深32～42m,直径70.6m,采用地下连续墙加内衬支护的结构形式,墙厚1.2m,上部内衬厚为2 m,下部内衬增加为2.5m。考虑到传统计算方法不足的情况下,对支护结构进行了模拟开挖过程的三维有限元法分析,运用软件ANSYS建立模型,分别计算得到开挖过程的变形和内力值。通过计算结果与实测数据进行对比,为深基坑工程的理论研究提出一些建议。The extra deep foundation pit 32～42 m in depth and 70.6 m in diameter is supported by diaphragm walls and linning walls.The thickness of the diaphragm walls is 1.2 m,and the thickness of the upper linning walls is 2 m while that of the lower ones is 2.5 m.Considering the shortage of the conditional methods,a 3D finite element analysis on the supporting structure during the simulated construction process was adopted.The values of deformation and internal-force were calculated by use of ANSYS.After comparing the calculated results with the actual data,some advice and suggestions on the foundation pit theory were given.

关 键 词：深基坑 有限元 变形与内力 

分 类 号：TU473.2[建筑科学—结构工程]