Study On The Design And Calculation Methods Of The Anti-Slide Pile For Landslide And Tunnel

It is often difficult to avoid crossing the landslide zone when construction of a railway or a highway in the mountains. Because of strong anti-slide ability and wide application, the anti-slide pile has been widely used in the prevention of landslide. The main design method of the anti-slide pile near the tunnel is the same as that of common anti-slide pile, without considering the the effects of tunneling on anti-slide pile and the effects of landslide on the tunnel,which is obviously unreasonable. In this paper, the design method of anti-slide pile near the tunnel were studied, the main contents and results include:1. Domestic progects about using the anti-slide pile to reinforcement the landslide near the tunnel were summaried and analyzed.2. Using the numerical analysis method and the single factor variable method,the distribution of the force and deformation under different conditions were compare、 analyzed and summaried. Variables include the distance between the tunnel and the pile、 landslide soil types、the upper long of the pile、the lower long of the pile and the stiffness of the pile.3. In order to determine the reasonable control value of pile displacement, the displacement relationship of the tunnel and the pile were researched. In order to make the action principle of anti-slide pile more clear, under different distances between the pile and the tunnel, under the different types of the anti-slide pile, the force and the displacement of the tunnel were researched.4. Using the numerical analysis method to calculate the transfer process of the landslide residual thrust,and comparing the result with that of the traditional transfer coefficient method. The result shows that the transfer coefficient method in calculating the landslide thrust can meet the engineering requirements.5. On the basis of the traditional transfer coefficient method, a simplified method to calculate the displacement of the slide was proposed. The method can be used to estimate the displacement of landslide and that of the structure in the landslide.6.On the basis of works above, the design method of the anti-slide pile near the tunnel were investigated.