Influence of Excavation Patterns on Stress-deformation of Landslide Crossed Orthogonally by Tunnel

Under the complex geological surroundings, landslide crossed orthogonally by tunnel can lead to severe geological hazards, for which reasonable engineering measurements have to be investigated, and excavation which can effectively reduce the sliding force is commonly used. In the paper one old landslide with more than 60 m thickness crossed orthogonally by tunnel along a highway in mountainous areas of Southwest China is numerically simulated to explore different excavation patterns affecting the stress and deformation. Three excavation patterns are numerical simulated and compared with the different excavation patterns in respect of displacement and stress, it is found that Case III of excavation pattern can be proposed.