Stability Analysis Of Soil Slope Subjected To Rain Infiltration

The stability of the slope is determined by its internal and external factors. The internal factors of the slope are inherent, and the external factors mainly include rainfall events, earthquake, and human excavation. The slope failure occurred frequently because of rainfall events in recent years. Therefore, modeling the effects of rainfall on the stability of unsaturated soil slope is an urgent and complicated engineering problem worldwide. The study presented in this thesis concerns this problem by using numerical analyzing methods.A slope was used to study how the rainfall infiltrates into a soil slope varying 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 sarurated. 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.The presented study numerical methods for is an attempt on the development and improvement slope stability analyses. Several conclusions on characteristics of the slope stability under rainfalls are obtained. The presented methods and models could be widely used for the numerical analyses on the stability of unsaturated soil slopes.