软土地基基坑挡土结构设计参数经验公式

土压力系数和土的水平抗力比例系数是基坑挡土结构设计的重要计算参数。土压力和土的水平抗力是与土的物理力学性质和挡土结构刚度、支撑、位移有着密切关系。本文通过挡土结构原位测试的实测土压力与挡土结构位移，经反分析逐一叠代得到的土压力系数与土的抗剪强度内摩擦角和土的水平抗力比例系数与挡土结构位移、土的抗剪强度内摩擦角，采用数理统计和相关关系分析方法，建立的土压力系数和水平抗力比例系数经验公式，对深基坑支护设计具有实用意义。

Empirical formula for the retaining structure design in soft soil foundation pit

The eoeflieient of earth pressure（k） and the ratio of horizontal subgrade reaction etveffieienl with tile depth（m） are the important parmneters in the retaining structure analysis Earth pressure and the horizontal reaetion are closely related with the physical meehmlics property ,retaining structure rigidity ,bracing .displacement. Based on the in situ test data（ earth pressure ＆ displacement of retaining strueture）, with the adoption of mathematical statistics as well as eorrelational analysis method, the paper set up two empifieal formula： 1 ,functional relationship of earth pressture with the angle of internal frietion;2 ,functional relationship of variable （m） with the displacement and angle of intern＇al frietion. Therefore, it is of pratieal importanee to the retaining structure design of deep foundation pit.