Analysis of Soil–Water Characteristics and Stability Evolution of Rainfall-Induced Landslide: A Case of the Siwan Village Landslide

This paper aimed to study the soil–water characteristics and stability evolution law of rainfall-induced landslide. Taking two landslide events in Siwan village as an example, formation conditions disaster were analyzed. Additionally, deformation destruction mechanisms landslides discussed in-depth. The hydraulic conductivity analyzed based on TRIM experiment results. Geo-Studio numerical software was further used for typical sections analyze under rainfall conditions. results showed that (1) characteristic curve (SWCC) inversely varies with water content volume, sliding body has lower saturated matrix suction than zone. function (HCF) increases higher (0.43 m/d) zone (0.03 m/d). (2) Rainfall is primary cause landslides, there a hysteretic effect. Heavy will inevitably accelerate analysis landslides. (3) Compared engineering analogy Fredlund Xing (FX) model, Van Genuchten–Mualem (VGM) model test experimental system can better reflect actual field situation. simulation method experiments scientifically sound reliable overburden