摘要
基坑围护结构的变形大小直接关系到围护结构的可靠性 ,影响到围周建筑、道路和地下管线的安全 ,因此计算基坑开挖引起土体和围护结构的变形是一项重要课题。本文推导了水泥搅拌桩围护结构变形计算的刚性墙—弹性地基法的解析式 ,研制了基于弹性墙—非线性弹性地基法有限元计算程度CPWALL ,并结合广州市广园东路铁路职工住宅大楼水泥搅拌桩基坑围护工程进行了应用研究 ,计算分析表明弹性墙—弹性地基有限法能较好地反映工程实际情况。应用该计算程序 ,根据基坑开挖过程中阶段性位移实测结果可通过反分析确定地基系数 ,并对是否设置土层锚杆、加长土层锚杆控制位移。
Lateral displacement is an important cause which results in failure of excavation for retaining structures.This paper presents two methods (stiff beam and elastic foundation method,elastic beam and elastic foundation FEM) to estimate the lateral displacment of the cement soil pile retaining structure.Through calculation of the displacement of the retaining structure,the lateral displacement calculated by the elastic beam and elastic foundation FEM agrees fairly well with the field records.This paper use the method to carry out back analysis and examines a few conditions of the engineering and obtains some useful results.
出处
《土工基础》
2002年第2期43-47,共5页
Soil Engineering and Foundation
关键词
水泥土搅拌桩
锚杆
围护结构
变形计算
反分析
cement soil pile,retaining structure,displacement calculation,back analysis
