Study On Mechanical Behaviors Of Support Structures Of Road Tunnel Going Through Under Landside

With land be utilized highly this years, it' s impossible to avoid landslide field totally when constructing freeway. And line' s location often across landslide with tunnel when it' s not easy to alter, especially considering the cost of techno Logy and economy. However, very few research work to be developed now when constructing tunnel in landslide. So, This thesis is to be combined with the Suan Shui Wan road tunnel (the key engineering of western region -Xi Chang to Pan Zhi Hua freeway), and study on the mechanical behaviour of the support structures in Suan Shui Wan road tunnel throughing below the tremendous landslide.By using finite difference procedure of FLAC^3D and model tests, construction simulation of Suan Shui Wan road tunnel and Landslide simulation is conducted. First, by analysis of changing regulation of horizontal displacementof landslide, it draws the influence law of stabilities of landslide exacuting tunnel in different distance of the vault and the slip surface conditions. Second, by comparing analysis of mechanical features of support structures and comparing analysis of displacements of tunnel in different sectors along the tunnel direction, this thesis conform the bounds and extends of the influenced tunnel during the process of tunnel construction at different shortest distance of the vault and the slip surface conditions. Last, analyzing mechanical features of support structures in course of landslide, it draws the influence law of tunnel caused by landslide. These results should be of guiding significance to design and construct of Suan Shui Wan tunnel engineering, and also be helpful to the resemble tunnel engineering in future.