Abstract: “Waste soil siege” is a major obstacle to rapid urbanization in China, posing potential safety hazards to the surrounding environment due to the landslide of landfills. In terms of the complexity of the landslide risk assessment of landfills, a method to evaluate the landslide risk level of landfills was proposed. In this method, the characteristics of waste soil and landslides were considered in each physical process of landslide risk assessment in a qualitative and semi-quantitative way. The method established a corresponding relationship between the slope safety factor and the failure probability grade, which divided the failure probability and damages of the landfill slope into four grades of extremely high, high, medium, and low, meanwhile， a risk level matrix of 4×4 was established. Landslide risk control countermeasures for the entire process of landfill construction were proposed, including site selection, construction and management, monitoring and early warning, as well as emergency response. A landfill in Hangzhou was taken as an example to illustrate the application of this method in an actual site. Through the slope stability analysis, migration distance estimation, and damage result statistics of the study area, the landslide risk level of the landfill after the filling was evaluated.

Key words: landfill, landslide, slope stability, risk assessment, risk control