以Mindlin应力方程为基础，对地下连续墙侧面进行单元划分，推导出地下连续墙侧摩擦力在土体中引起的附加应力公式；对于长宽比较大的地下连续墙，墙端荷载按平面应变问题分析考虑，推导出地下连续墙墙端荷载在土体中引起的的附加应力公式，根据所求得的附加应力，采用分层总和法求解地下连续墙的沉降。

On basis of Mindlin stress solution, the author divides the diaphragm wall into small units and deduces the calculation equation of the additional stress in the soil under the action of frication on the side of the diaphragm wall. As for diaphragm walls with large length/width ratio, the author treats the load at the bottom of the diaphragm walls as plan strain and deduces the calculation equation of the additional stress in the soil under the action of load at the bottom of the diaphragm walls. Based on the gained additional stress, the settlement of the diaphragm walls is calculated by the layerwise summation method.