Research On The Reinforcement Technology Of Anti-Slide Pile For Tunnel-Landslide Orthogonal System

When the railway tunnel goes through bad location, landslide disease is often a headache for engineers. Due to the reasons of the line selection through the mountain is inevitable and the limitations of the engineers’s understanding of the landslide, tunnel in the old landslide geological conditions is discovered when the tunnel is in the course of excavation or has been finished. For this reason, it is necessary to take measures of the tunnel disease.This paper is based on the interval of XiangYu line K328+056-K328+579.2. Qi GanGou tunnel is a typical tunnel of a Tunnel-Landslide orthogonal system. In the course of the study, this paper used the means of Geological Survey, theoretical calculations, numerical simulation, geomechanical model test. It gives a more in-depth research in the mechanism of the interaction of tunnel and landslide, the mechanism of the anti-slide pile’s reinforcement for this system, the space of anti-slide pile and tunnel, anti-slide pile and pile spacing.(1) It discussed the types of the Tunnel-Landslide orthogonal system in detail, and summarizesd the characteristics of landslide deformation of tunnels and landslides. It analyzesd the deformation characteristics of the tunnel and landslides, and the influencing factors of them which were caused by the deformation. It also gives the corresponding five kinds of geomechanical model.(2) During the study process of the Tunnel-Landslide orthogonal system, it choosed XiangYu line K328+056-K328+579.2as the typical example. By the means of the geological survey, it gived the the reasons of the tunnel and the old landslide’s deformation and failure, and comed to its interaction mechanism. It calculated the landslide thrus of three kinds conditions which were natural, storm, earthquake, and gives the tunnel forces without the reinforced of piles. With the tunnel forces, it obtained that the tunnel was in the obvious bias forces effect. So it got the reason of the tunnel deformation in the angle of the force analysis.(3) Through the selection of anti-slide pile retaining comprehensive management and drainage engineering programs, the tunnel without retained and retained tunnel forces were contrasted in natural condition. By the comparison, it got the mechanism of the reinforcement of the anti-slide pile in governing the Tunnel-Landslide orthogonal system. During the process, the good effect of the embedded anti-slide pile for such a system was proved.(4) With the use of the finite element analysis softwareFLAC3D, it simulated the model in5kinds of working conditions, and got to a reasonable pile tunnel space and anti-slide pile in- space.(5) By the geomechanical model test, it took out three tests about the Tunnel-Landslide orthogonal system which were without retaining, anti-slide pile3.5times the pile diameter, anti-slide pile5times the pile diameter. After the tests, the slope surface displacement and internal force diagram of the tunnel were comparatively analyzed. With the results, it comed to the opinion that the anti-slide pile reinforcement effect is remarkable, and the results of numerical simulations inside is veryfied.