地铁深基坑变形规律参数化方法探讨

Study on the Method of Parametric Deformation Rule for Metro Deep Foundation Pit

在对基坑隆起、基坑围护桩体水平变形以及基坑周边地表沉降产生机理、变形规律和影响因素分析的基础上,提出各测项的变形模式:基坑隆起为抛物线模式,围护桩体水平变形和基坑周边地表沉降为双直线模式。变形模式中的参数取值与基坑条件(包括工程、水文地质条件、岩土体物理力学性质、支护结构形式等)存在对应关系。给出了以监测数据为基础的各变形模式参数的线性回归方法,为建立以回归参数控制的预测分析库奠定基础。

Based on the analysis of production mechanism, deformation law and influencing factors of foundation heave, deformation of retaining str4tctures and ground settlement, the authors put forwards deformation modes of each item： deformation mode of foundation heaYe is parabolic curve, deformation mode of deformation of retaining structures and ground settlement is double-line. Parameter values of deformation mode are related to engineering geologic condition, mechanical properties of soil and supporting structures of foundation pit. The Authors propose linear regression method of deformation modes based on monitoring data. Lay the foundation for setting up prediction analysis library control to the regression parameters.