岩土体物理力学参数对岩质滑坡稳定性的影响

采用有限元-极限平衡法研究了含软弱滑动带的岩质滑坡滑动体、滑动带和滑床的密度、弹性模量和泊松比及滑动带的抗剪强度对滑坡稳定性的影响。结果表明:滑床密度、滑体及滑动带的弹性模量、滑动带及滑床的泊松比和滑动的抗剪强度指标与滑坡稳定性系数呈正相关关系,而滑体及滑动带土体密度、滑床的弹性模量和滑体的泊松比与滑坡稳定性系数呈负相关关系;软弱滑动带的抗剪强度对滑坡稳定性的影响最显著,其次为软弱滑动带的泊松比和滑床的弹性模量,其他参数的影响相对较小。 

Influences of physical and mechanical parameters of geo-material on stability of rock landslide

The influences of density,elastic modulus and Poisson's ratio of landslide mass,weak slip zone and landslide bed,and shear strength of weak slip zone on landslide stability are studied using the method combining finite element method with limit equilibrium method.The results show that there are positive relationships between the density of landslide bed,elastic modulus of landslide mass and weak slip zone,Poisson's ratio of landslide bed,shear strength index of weak slip zone and factor of stability of landslide,while there are negative relationships between the density of landslide mass and weak slip zone,elastic modulus of landslide bed,Poisson's ratio of landslide mass and factor of stability of landslide,and that the most important factors affecting landslide stability are shear strength index,the Poisson's ratio of weak slip zone and elastic modulus of landslide bed are in second order,and other parameters are non-sensitive to landslide stability.