ABSTRACT
The expressway starting from Shiyan in Hubei province to Manchuanguan in Shaanxi Province is an important section of Yinchuan-Wuhan Expressway, one of the eight interprovincial expressways planned. The Shiyan-Manchuanguan expressway is an important section of the Yinchuan-Wuhan interprovincial Expressway. The road must go through different geological structure units and Liangyun Fracture. The chapter discusses the slope deformation and failure mainly are two types: landslide and dilapidation. The landslides occur usually in interbed between soft rock and hard rock. The slopes of soft and hard interbedding are in the majority of schistous slopes. The bedded plane trending the slope is well developed and badly eroded into quite fragmented rock mass. The mechanism of all the landslides existing along the expressway is that because the foot of the excavated slopes is free, the original stress equilibrium is destroyed and the slope slumps along the direction of the free face.
