深基坑开挖变形及被动区土体应力分析  

Analysis on deformation and stress in passive area of the pit

作　　者：付艳斌[1] 杨骏 王铁行[3] 

机构地区：[1]深圳大学土木工程学院,广东深圳518060 [2]深圳地铁有限公司,广东深圳518026 [3]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《广西大学学报（自然科学版）》2009年第3期301-304,共4页Journal of Guangxi University（Natural Science Edition）

基　　金：国家863计划资助项目(2006AA11Z102);深圳市科技计划项目(SY200806270077A)

摘　　要：以基坑插入比和宽高比作为主要影响因素,采用有限元法对基坑开挖全过程数值模拟,分析基坑开挖应力应变变化规律。结果表明基坑宽高比对水平应力变化比较敏感,插入比对基坑变形比较敏感。最后对基坑侧压力系数进行了理论推导,验证了数值模拟结果并指出了理论公式的局限性。In order to study the stress-strain characteristics of the excavation, the finite element method was used to simulate different construction schemes of the excavation by changing the in- sertion ratio and the ratio of width and height. The result showed that the ratio of width and height was sensitive to horizontal stress and the insertion ratio was sensitive to the deformation in excavation. Lateral pressure coefficient were derived theoretically and compared with the simulat- ed results for verification, then the limitation of the theoretical formula was discussed.

关 键 词：深基坑 基坑变形 土体水平应力 

分 类 号：TU431[建筑科学—岩土工程]