不同沟底摩阻力工况下泥石流动力学研究  

Research on the dynamics of debris flow based on different basal resistance conditions

作　　者：张立舟[1,2] 王彦琦[3] 赵文俊[4] 王锐[1] 靳小海 

机构地区：[1]重庆市勘测院,重庆400020 [2]香港大学土木工程系 [3]重庆交通大学土木建筑学院,重庆400074 [4]重庆交通大学国际学院,重庆400074

出　　处：《水文地质工程地质》2014年第4期113-118,共6页Hydrogeology & Engineering Geology

基　　金：交通部西部交通建设科技项目(2013318814180)

摘　　要：本文以暴雨诱发的裕东路泥石流为例,通过泥石流动力学分析软件2d-DMM建立了摩擦模型、Voellmy模型两种沟槽底部摩阻模型,对该次泥石流的速度、运动距离等特性进行了分析和比较。通过对泥石流特定点的运动速度与观测速度的比较、模拟运动距离与观测运动距离的比较,得出香港典型泥石流动力学分析的相关摩阻模型,并提出泥石流支护防治建议。The 2008 Yu-Tung-Road debris flow happened in Hong Kong and caused serious consequence that blocked road and led to casualties. After the occurrence of such disaster,the GEO placed several barriers,including check dam as well as flexible barriers. However,the dimension and structural design of barriers depend on the dynamics of debris flow,indicating that the dynamic behavior deeply affect the design of debris flow barriers. In this paper,the Yu-Tung-Road debris flow is studied and based on the debris flow dynamic behavior analysis software 2d-DMM,the velocity of debris flow and travel distance are also analyzed by the frictional model and the Veollmy model to simulate the basal frictional effect and the simulated results are compared with the measured data. In accordance with the diffident basal frictional models and the entrainment rate,the Voellmy model with the consideration of appropriate entrainment rate is recognized as the best model for the dynamic behavior of debris flow in Hong Kong. The mitigation suggestions is also put forward.

关 键 词：泥石流 滑体运动模型 底部摩阻模型 2d-DMM数值分析 

分 类 号：P642.23[天文地球—工程地质学]