软土地区深基坑连续墙最大变形简易计算方法

采用有限单元法研究了影响软土地区地下连续墙最大侧向变形的主要参数。针对基坑开挖深度H、基坑开挖宽度B、单位宽度地下连续墙系统刚度S、支撑结构的轴向刚度 及黏土归一化的不排水抗剪强度 为不排水抗剪强度， 为有效垂直应力）5个参数进行分析研究，通过回归分析研究结果，给出地下连续墙最大侧向变形的简易计算方法。利用简易计算方法，计算实际工程中基坑案例的地下连续墙最大侧向变形，并与现场监测结果进行对比，验证了计算方法的准确性，可为以后预估地下连续墙最大侧向变形及检查设计提供参考。

Simplified method for calculating maximum deformation of diaphragm walls caused by braced excavation in soft clays

By using finite element method, a series of parametric studies is performed for the maximum wall deflection induced by excavation in soft clay. Five main parameters effecting deformation i. e. excavation depth(H), excavation width(B), system stiffness(S), axial stiffness of the supporting structure(Sa), ratio of the average shear strength over the vertical effective stress , are analyzed. Based on the results of parametric studies，a simplified calculation method for maximum wall deflection is proposed using multiple regression. The proposed method is verified through several case stdudies. The proposed method can be used to preliminarily predict and also check the final results of design.