Abstract:When the tunnel crosses the landslide orthogonally, it will induce the unfavorable situation of the landslide movement and the tunnel deformation increase. In order to study the interaction between the two, increase the understanding of the deformation of the landslide and the tunnel, provide reference for the design and construction of the tunnel, monitor and analyze the Turks landslide and the tunnel, and excavate the position and slide from the tunnel. From the perspective of the vertical distance of the belt, combined with the geological conditions of the landslide and the tunnel of the Turks tunnel, the numerical simulation calculations under eight different working conditions are designed. After the tunnel excavation causes the landslide to move, the landslide slides on it. The influence of the deformation of the orthogonal tunnel under the tunnel is analyzed. The law of the vertical distance between the landslide and the sliding zone at the top of the tunnel is analyzed. The following conclusions are drawn: (1) The critical depth of the interaction between the landslide and its orthogonal underpass tunnel is about 3D (D is the width of the tunnel excavation). At this time, the interaction between the two is small, and the tunnel excavation has no disturbance effect on the upper landslide. (2) When the tunnel is excavated under the landslide, the displacement caused by the landslide is the largest when the excavation position is in the middle of the landslide, and the landslide has the greatest influence on the tunnel deformation, followed by the slope foot and the slope top.