摘要
依托苏州地铁某车站深基坑,建立了有限元分析模型并模拟了实际开挖工况,得到的分析结果与现场监测数据进行了验证,证明了有限元模型的准确性。并在此基础上对影响SMW工法围护结构变形的常见因素进行了敏感性分析,选取围护结构最大位移u_(max)作为特征参数,围护结构入土深度、支撑刚度、支撑间距作为敏感性因素进行分析。得出结论是:支撑刚度对桩身最大位移u_(max)影响最大,支撑水平间距次之,围护结构深度对桩身最大位移u_(max)影响最小。
Based on the deep foundation excavation of a subway station in Suzhou, a finite element analysis model is established to simulate the actual excavation, analysis results and field monitoring data verification proved the accuracy of the finite element model. Based on this, the sensitivity analysis of the common factors that affect the deformation of SMW retaining structures is done, selecting retaining structure maximum displacement of Ureax as a characteristic parameter, soil retaining structure depth, brace stiffness, support spacing as sensitivity factors were analyzed. The conclusions are as follows： the support stiffness has the greatest influence on the maximum displacement umax of the pile, the supporting horizontal spacing is second, and the depth of the retaining structure has the least influence on the maximum displacement of the pile U max.
出处
《施工技术》
CAS
北大核心
2017年第15期112-116,共5页
Construction Technology
关键词
深基坑
SMW工法
围护结构
变形
敏感性分析
deep foundation excavation
SMW method
retaining structure
deformation
sensitivity analysis
