Abstract: Some tunnels are inevitably built to cross the landslide zone in actual engineering. Besides, under the action of late geological evolution and construction disturbance, the slope that has no obvious deformation or more stable slope will appear larger deformation and even develop into a landslide. Consequently, the landslide has negative effects on the tunnel structure. So tunnel structure will be affected and even be interrupted. At present, most scholars at home and abroad are focus on stress and deformation of landslide body caused by tunnel excavation. There are few studies on the force, deformation and reinforcement of existing tunnel structures under the action of landslide. In order to study the stress and deformation of the reinforcement measures of the existing tunnel cable in landslide mountain area, firstly we establish the geomechanical model test and study on the interaction between the landslide and the tunnel structure that with the reinforcement of the different number of anchors and compared with that without the reinforcement. Then, we use the numerical software to establish the model under the corresponding conditions, compared with the physical test results. It shows a good consistency. The results can provide a theoretical basis for the anchor cable reinforcements of the tunnel in the landslide mountain area.

Key words: tunnel, landslide, anchor cable, model test, numerical simulation