深基坑回弹的空间性状研究  

Three-Dimensional Properties of Foundation Pit Resilience Under Unloading

作　　者：陆培毅[1] 余建星[1] 肖健[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《天津大学学报》2006年第3期301-305,共5页Journal of Tianjin University(Science and Technology)

摘　　要：提出了深基坑回弹空间效应分析的三维有限元模型.该模型模拟了深基坑分步开挖过程和支撑方式的变化,土体采用修正剑桥模型．同时定量地分析了基坑形状、基坑开挖面积以及开挖深度等因素对基坑开挖回弹量的影响．所提出的回弹计算方法可以为工程师有效地预估深基坑工程中不同基坑形状、不同开挖面积和深度的回弹提供依据．A three-dimensional finite element model considering spatial effect of foundation pit resilience is proposed in this paper. In this model, the sequential excavation and strut installations are simulated in the stratified soil, and soil nonlinearity is modeled using modified so analyzes the relationships between pit resilience under unl cam-clay constitutive relationship. This paper aloading and spatial characters including different foundation pit areas, excavation shapes and depths. Finally the paper deduces a feasible method for engineers to evaluate the pit resilience displacement with different shape, area and depth.

关 键 词：基坑回弹 空间效应 修正剑桥模型 

分 类 号：N031[自然科学总论—科学技术哲学] G301[文化科学]