Analysis and Research on Instability and Sliding Mechanism of High Fill Subgrade Slope in A Mountainous Area

The instability and sliding of high fill subgrade slope in mountainous areas is often caused by the lack of effective treatment of subgrade filling, the existence of weak surface in the slope and the failure to take drainage measures in the surrounding areas. Based on the comprehensive analysis of the landslide shape and deformation characteristics, crack distribution, surrounding groundwater exposure and other aspects of a mountain high fill subgrade slope, the sliding mechanism of high fill subgrade landslide was discussed. The slope stability was calculated and evaluated by using Swedish slice method and finite element numerical simulation method, so as to provide reference for landslide treatment scheme. The engineering geological characteristics and key issues of this kind of landslide are sorted out and summarized, which can provide reference for similar situations.