Abstract: The Chengjiaba landslide site is in Hongguang Division of Jinghe Village, Longcanggou Town, Yingjing County. From the evlation of the geological conditions and triggering factors of the landslide, the mechanism of landslide deformation is analyzed in detail in this paper. The evaluation concluded that the pattern of this current landslide is a traction landslide in the colluvium deposits. The sliding surface is also controlled by the interface between the base and the sliding body, the position of silty clay interlayer in the accumulation body and the groundwater level. Both qualitative evaluation and quantitative analysis predictions are used to determine the stability of the landslide. The evaluation also concluded that the possibility of the landslide slip along the surface outside the highway was not likely. Other potential slip surfaces might not be stable. Landslide remediation measures in the colluvium deposit are also proposed in this paper.

Key words: Colluvium Deposit, Landslide, Landslide Development, Stability