【摘要】 以国道G316线安康~汉阴段K25附近膨胀土公路滑坡为例,分别运用非饱和土强度理论的Fredlund强度公式以及饱和土的有效应力原理,分析了该膨胀土公路滑坡滑带土强度破坏的力学机理,同时运用FLAC2D数值方法模拟了其运动机理与过程,得出了膨胀土公路边坡开挖前后的应力、位移、应变及弹塑性状态变化的规律。更多还原

【Abstract】 With an example of expansive soil highway landslide in Sta.K25(from Ankang to Hanyin) of G316 National Highway,the Fredlund strength theory,exponential function strength equation of unsaturated soil intensity theory and effective stress principle of saturated soil are used respectively to analyze the failure mechanism of slip zone soil shear strength,the change process of slip zone soil strength for cut slope before and after excavation are studied,meanwhile the method of fast FLAC2D analysis is used to simulate the kinematic process of landslide,and then the law for stress,displacement,strain and elastic-plastic state change of expansive soil highway landslide before and after excavation is gotten,and the results can offer a reference for prevention and treatment of expansive soil highway landslide.更多还原