Damming of Large River by Debris Flow: Dynamic Process and Particle Composition

作     者：DU Cui YAO Ling-kan SHAKYA Subhashsagar LI Lun-gui SUN Xiao-dan 

作者机构：School of Civil Engineering Southwest Jiaotong University MOE Key Laboratory of High-speed Railway Engineering Southwest Jiaotong University Road and Railway Engineering Research Institute Sichuan Key Laboratory of Aseismic Engineering and Technology 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2014年第11卷第3期

页      面：634-643页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0303[法学-社会学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0705[理学-地理学] 0815[工学-水利工程] 0837[工学-安全科学与工程] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：supported by the National Basic Research and Development Program of China (Grant No. 973:2011CB409902) the Key Project of National Natural Science Foundation of China (Grant No. 41172321) Southwest Jiaotong University Doctor Innovation Fund 

主　　题：泥石流灾害 筑坝 颗粒组成 河流 动力学方程 重整化群理论 极端天气 水槽实验 

摘      要：The frequency and extent of debris flows have increased tremendously due to the extreme weather and the Wenchuan earthquake on May 12, 2008. Previous studies focused on the debris flow from gullies damming the mountain streams. In this paper, an equation for the run-out distance of debris flow in the main river is proposed based on the dynamic equation of debris flow at different slopes given by Takahashi. By undertaking field investigations and flume experiments, a new calculation method of the volume of debris flow damming large river is obtained. Using the percolation theory and the renormalization group theory it was deduced that the large particles should comprise more than 50% for forming a stable debris flow dam. Hence, the criteria of damming large river by debris flow is presented in terms of run-out distance and grain composition which was then validated through the event of damming river by debris flow at Gaojia gully, the upper reaches of the Minjiang River, Sichuan, China, on July 3, 2011.