多年冻土区热融滑塌型滑坡稳定性评价方法

Landslide of thaw-slumping in permafrost regions of the Qinghai-Tibet Plateau is studied in this paper. Thaw-slumping belongs to shallow landslide with small depth-length ratio. Therefore the infinite slope analysis method is available to be applied in the stability analysis. Considering identical seepage directions to slope surface, we deduced analytical expressions of safety factor according to the effective stress principle and plotted stability analysis chart of slopes with dry or fully saturated soils.Taking an example of landslide of thaw-slumping at the mileage of K3035 of the Qinghai-Tibet Highway, we evaluated the analytical expressions.