黄土基坑桩锚支护开挖变形分析

Analysis of Deformation in Excavation of Pile Anchor Bracing for Loess Foundation Pit

依托西安某湿陷性黄土场地桩锚支护的深基坑开挖工程,采用ABAQUS有限元软件,研究围护结构在不同开挖深度下的变形及周围土体的变形特征。结果表明:围护结构及周围土体的变形随开挖深度的增大而增大;矩形基坑存在明显的空间效应;长边方向上连续墙水平位移、竖向位移、墙后土体变形均大于短边方向。

Based on deep excavation engineering of pile anchor bracing on a collapsible loess site in Xi'an,ABAQUS finite element software was used to study the deformation characteristics of the retaining structure in different depth of excavation and the surrounding soil.The result shows that,the deformation of the retaining structure and the surrounding soil increase with the increase of the excavation depth;there exists significant spacial effect in rectangular foundation pit;both the horizontal and vertical displacement of diaphragm wall,and the soil deformation behind the wall on the long sides,are larger than those on the short sides.