【摘要】 鉴于牛圈沟滑坡为地震触发的典型滑动-碎屑流型滑坡,采用滑坡动力学分析(Dynamic analysis)软件DAN-W对牛圈沟滑坡全程动力学特征进行分析,使用试错法对比分析摩擦准则与Voellmy准则两种不同流变关系的模拟效果.结果表明:摩擦准则应用于滑体的初始运动阶段,Voellmy准则应用于滑坡后期碎屑流阶段时模拟效果最佳;并给出最佳的流变参数,得到滑坡堆积体的体积和形态变化,滑坡运动速度及变化规律.更多还原

【Abstract】 Niujuangou rockslide-debris avalanche is known as a typical rockslide-debris avalanche,which was triggered by the Wenchuan earthquake.Superposed earthquake effects came from horizontal and vertical directions made initial rock mass throw out and move rapidly,after experiencing several strikes,rock mass almost fragment,and sliding mass move like debris avalanche in Niujuangou creek.A dynamic model DAN was used to back analysis of this event.Both Friction rule and Voellmy rule were modeled and compared.The results show that it would be best to adopt Friction rule in the proximal path and Veollmy rule in the distal path.And most suitable parameters,volume and profile of deposition,velocity of sliding mass were obtained.更多还原