国际商城基坑支护实测及平面有限元分析  

Analysis of the Monitoring and FEM Calculation of International Shopping Mall's Foundation Pit

作　　者：张小平[1] 王一鸣[1] 

机构地区：[1]南京航空航天大学

出　　处：《地下空间与工程学报》2009年第1期108-111,共4页Chinese Journal of Underground Space and Engineering

基　　金：江苏省自然科学基金(青年科技创新人才技术带头人)项目资助;项目编号(BK2004427)

摘　　要：由监测结果表明,国际商城基坑桩顶水平位移及桩身最大变形值都已超过报警值,这主要是由于拆撑处理不当造成,因此基坑的安全性不仅取决于设计的合理性更取决于施工的科学性;采用Drucker-Prager模型对国际商城深基坑工程进行了有限元计算,计算结果与实测变形曲线非常吻合,表明此计算模型是适合的;内撑式的基坑围护结构桩体水平变形呈中间大两头小的特点,最大位移发生在坑底附近位置;附加超载对基坑位移的影响非常显著。According to the results of the monitoring,it is shown that the horizontal displacement of the top of the pile and the pile body＇s maximum deformation of the International Mall pit exceed the warning value, this is mainly due to the improper method of the sustenance backout, thus, the safety of the pit foundation depends not only on the rational design, but also on the rational construction. By the use of Drucer--Prager mode to make FEM calculation to this pit foundation, it is found that the calculation results are close to the actual monitoring curve, showing that this mode is appropriate. The horizontal transmutation of the inner supporting pit structure has the character of being small at the endpoints but big at the middle. The biggest displacement takes place at thevicinity of the pit bottom. The additive load has an obvious impact on the displacement of the pit foundation.

关 键 词：基坑支护 实测 有限元分析 

分 类 号：TU413.6[建筑科学—岩土工程]