Instability mechanism and stability trend of loess slope during seasonal Freeze-thaw process

Seasonal freeze-thaw landslides are one of the main types of loess disasters.The groundwater response is extremely sensitive during seasonal freezing and thawing.The distribution and changes of groundwater level have a greater impact on the stress state, mechanical properties and slope stability of the rock and soil in the loess slope.Slope caused by stagnant water during freezing and draining during thawing.The change of groundwater level within the scope is one of the main inducing factors for the stability change and instability of the loess slope.Based on the whole process of slope groundwater change during seasonal freezing and thawing, this paper adopts the slice method based on limit equilibrium theory and the finite element numerical method based on elastoplastic theory to analyze and calculate the slope stability and slope stress and strain field response.Under seasonal freezing and thawing conditions, the failure mechanism and stability change trend of the slope of loess slopes.Provide scientific basis for early warning and prevention of seasonal freeze-thaw landslides.