ANALYSIS OF THE ORIGINAL OF NANLIDU LANDSLIDE IN THE WEST SECTION OF NO.318 NATIONAL HIGHWAY

On the basis of investigation and tests, We considered that the main internal cause of the Nanlidu landslide formation is a result of the soft and hard interlayered rock formation and the development of separation fracture of Badong gnup in Triassic.The road's construction changed the original equilibrium state of earth surface, A large amount of superficial water seeped into the slope, Which reduced the mechanical strength of highly decayed xrxk and slope soil, And finally formed the landslide. The deformations and failure modes of the landslide shows differences in its different parts.We gave demonstrations separately during our research and hoped that would be helpful while meet siamilar case.