The Study of Cross-bedding Rock Landslide's Failure Mechanism and Prevention Measures

Modaoxi landslide was caused by artificial cutting slope and improper prevention measures. In the early stage, the shallow deformation occurred in the slope due to improper design, and then the deep deformation of the slope was caused by several adverse factors such as excavation and heavy rain, which led to decrease rapidly in the stability. Therefore, this paper elaborates the engineering geological background, deep displacement monitoring, slope stability, project management process, and deformation mechanism of Modaoxi landslide, which uses "double row pile" comprehensive scheme after comparison of several schemes to renovate the landslide, which is of a good effect. The results show that: a) "Double row pile" scheme is the best scheme of regulating Cross-bedding Rock landslide with huge thrust, which can be used for reference in similar projects; b) Selecting highway line must implement the geological alignment selection principle and eliminate artificial cutting slope which can cause landslide. It is necessary to compare design scheme like "bridge cross river" and "tunnel into mountain" in order to choose the best one. c) When open tunnel structures cross the landslide, it has to prevent the tunnel from being eccentric stress state, which potentially threats the open tunnel. d) The establishment of dynamic monitoring network plays a key role in the regulation project for providing a reliable basis to determine the range of Cross-bedding Rock Landslide deformation, rock landslide sliding surface, sliding direction, excavation impact on landslide.