Quaternary deposit consisting of sludgy loam is internal cause of the landslide,while thixotropy dilution and decrease in shear strength is inducer of the landslide.

• 该段第四系堆积层深厚,淤泥质亚粘土是滑坡形成的内因,在振动荷载作用下,产生触变,稀释,抗剪强度降低是滑坡形成的诱发原因。