结构工程师2012，Vol.28Issue(5)：111-117,7.
二级联合支护结构深基坑整体稳定性分析
Analysis of Overall Stability of Combined Retaining Structures in a Deep Excavation
摘要
Abstract
The unexpected change often takes place in the design of deep foundation pit, which may lead to a larger depth of excavation in some parts of the foundation pit. So a special combined supporting system with different top elevation for each retaining wall is applied in some practical projects. Because the overall stability of this kind of retaining structure can not be analyzed by using the common design software directly, a FEM software ABAQUS based on the concept of the shear strength reduction was applied in the analysis. The abruptness of the curve, which says how the maximum displacement varies along with the factor of the shear strength reduction, was used as the instability criterion of the pit. And the effect of many factors on the overall stability of the retaining structure such as the depth of the inner retaining wall, the stiffness and the distribution of struts was analyzed systematically. Finally, a simplified model for the analysis of the combined supporting system was presented so that the stability of such kind of retaining structure could be analyzed directly by using a common software. The range of the relevant parameter value was also offered based on the computational results from some typical soil, which can be used as a helpful reference in the similar projects.关键词
强度参数折减法/整体稳定性分析/深基坑/ABAQUS/简化模型Key words
shear strength reduction, basal-heave stability analysis, deep foundation pit, ABAQUS, simplified model引用本文复制引用
顾赞勇,胡安峰,陈博浪..二级联合支护结构深基坑整体稳定性分析[J].结构工程师,2012,28(5):111-117,7.基金项目
"十一五"国家科技支撑项目(编号2008BAJ06B00) （编号2008BAJ06B00）
