【摘要】 边坡破坏后的运动过程及运动距离预测可以为灾害危险性区划、风险评估等提供定量分析依据,可以为灾后重建规划以及地震区工程建设提供指导。节理岩质边坡的破坏和其后的运动过程非常复杂,没有理论方法可以对这一过程进行合理的描述,而数值模拟方法是研究这一问题的有效途径。采用颗粒流程序PFC2D对节理岩质边坡的破坏和运动过程进行了研究,分析了关键参数对结果的影响,得出了破坏后的堆积形状和最终的运动距离。研究结果表明,颗粒流程序不但可以描述岩石等连续介质,而且可以描述节理岩体以及碎屑等不连续介质,是研究岩质边坡破坏运动的有效方法。更多还原

【Abstract】 The post-failure behavior of slopes is very important for the hazard map producing and risk assessment of landslide.The kinematic process of heavily jointed rock slopes was simulated using a 2D discrete element model(PFC2D code).The numerical model was composed of discs bonded together,and can simulate the behavior of both intact rocks and joints.A steep rock slope which was intensively disturbed by the Wenchuan Earthquake was analyzed using the PFC2D code.Parametric study was performed to examine the influence of particle bond strength on the geometry of the sediment and runout of the slide.Results showed that the determination of particle properties is the key of the numerical simulation.更多还原