Abstract
Typhoon rainfall is the main inducing factor of landslide disasters in Fujian Province. Rainfall infiltration causes changes in dynamic parameters such as water content of slope rock and soil and surface displacement. The disaster process of landslide disaster has the characteristics of rapid occurrence, short process, and no obvious signs of deformation, so it is difficult to pre-determine the hazard body. Original samples of residual cohesive soil were sampled on site, and an indoor unsaturated strength test was carried out. The influence of changes in moisture content caused by rainfall on the strength characteristics of residual cohesive soil was analyzed. The test results showed that the shear strength of the disabled cohesive soil varies with the strength characteristics of the residual cohesive soil. It differs depending on the water content. The smaller the water content, the greater the matrix suction of the soil, and the greater the shear strength, which is of great significance for subsequent studies on the mechanism of landslide hazards.
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