基于位移-位移平面应变边值问题，从理论上求解基坑挡墙水平变位诱发墙后周围土体水平移动。通过镜像映射法求得了挡墙平移与绕墙趾转动等两种基本刚性挡墙位移模式下墙后周围土体水平移动的精确理论解；在土体不可压缩的特定条件下，将该理论解与经典的汇-源理论解进行了对比验证。理论分析表明，周围土体水平移动主要取决于挡墙位移模式及位移大小，与地基土的变形模量无关。针对不可压缩土体，对比该精确解与汇-源理论近似解的理论预测发现，两种理论方法求得的周围土体水平移动规律一致，但在挡墙最大变位处相邻范围内，汇-源理论求得的土体水平位移偏小，在挡墙变位较小处相邻范围内，汇-源理论求得的土体水平位移偏大。

The excavation-induced horizontal movement of soil behind retaining wall is analytically deduced based on displacement-displacement boundary problem under plane strain condition. With respect to two basic modes of wall movement, i.e. translation and rotation about toe, the exact theoretical solutions to horizontal movement of soil behind wall are provided. Specifically for incompressible soil, this theoretical solution has been validated by comparing to the classical Source-Sink theory. It has been indicated that horizontal movement of soil behind retaining wall depends essentially on the mode and magnitude of wall displacement and independent of Young’s modulus of soil. As for incompressible soil, the present theoretical solution may result in well consistent predictions with the classical Source-Sink method. However, Source-Sink method always provides an approximate solution, which tends to underestimate the horizontal movement of soil around the deep position with maximum wall displacement, and overestimate that of soil around the deep position with minimum wall displacement.