中文摘要：

降雨或库水位变化造成的土坡失稳现象与土体中的非饱和非稳定渗流密切相关，考虑非饱和非稳定洛流的土坡稳定分析方法是值得深入研究的课题。主要对考虑非饱和非稳定渗流的极限平衡法和位移有限元法进行评价和对比，着重讨论了强度折减有限元法在考虑渗流作用的土坡稳定分析中的应用，给出了一些初步成果，并提出了今后的研究方向。

英文摘要：

The instability of soil slopes induced by rainfall or the variation of water level is often related to unsaturated transient seepage in soils and the stability analysis of slopes subjected to unsaturated transient seepage has attracted increasing attention in recent years. The purpose was to give a comparison between the limit equilibrium method and the displacement-based FEM for the stability analysis of soil slopes subjected to unsaturated transient seepage. Emphasis was given to the discussions on the utilization of the strength reduction FEM in the stability analysis of slopes considering seepage and some primary results were presented. Topics for the further research in this area were also discussed.