Numerical models were used to study how the infiltration into a slope varies with the rainfall intensity , rain fall duration , soil properties and how the infiltration influences the stability of a slope . a numerical program is coded to solve the transient seepage field by using the finite element and finite difference methods based on the saturated - unsatured soil seepage theory . a model for considering the variations of soil weight and shear strength is created / constructed and the corresponding program is coded 本文针对受降雨影响显著的非饱和残积土土坡，运用饱和?非饱和土壤水分运动的理论和二维非稳态渗流有限元模型，模拟雨水入渗引起的暂态渗流场，将计算所得到的暂态孔隙水压力分布用于考虑了基质吸力影响的土坡稳定安全系数的计算当中，建立了考虑非饱和土土坡从雨水入渗到出现滑坡危险全过程的计算模型。
The slope project is one of the three big problems of geotechnical engineering ; cut soil slope is one of the important types of slope projects ; engineering construction of the traffic , such as highway , railway in the mountain area and hills area etc . is developing rapidly , which will inevitably encounter the deformation and stability of cutting cliff debris and residual soil slopes 边坡工程是岩土工程三大问题之一；路堑式土边坡是边坡工程中的重要类型之一；迅速发展的山区和丘陵地区的公路、铁路等交通工程建设，必然会遭遇路堑式坡残积土边坡的变形与稳定性问题。
A systematic study is conducted on engineering behaviors of residual soil , failure mechanism of residual soil slope and mechanism of natural flow slides triggered by rainstorm in jiang jia drainage area . to investigate engineering properties of disturbed soils , a series of tests , including grain - size analyses , permeability tests , direct shear tests and dynamic iriaxial lest is performed on specimens 本文在总结热带坡残积土地区暴雨滑坡转化成泥石流的研究现状和进展的基础上，对云南东川市蒋家沟地区坡残积土的工程特性、暴雨条件下斜坡土体的破坏机理、暴雨滑坡转化成泥石流的形成机理和形成过程进行了较为系统的研究。
