Experimental study of debris flow caused by domino failures of landslide dams

作     者：Hua-Yong CHEN Peng CUI Gordon G.D.ZHOU Xing-Hua ZHU Jin-Bo TANG 

作者机构：Key Laboratory of Mountain Hazards and Earth Surface ProcessCAS Institute of Mountain Hazards and EnvironmentCAS 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2014年第29卷第3期

页      面：414-422页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the Key Program of the National Natural Science Foundation of China(Grant No. 41030742) the Key Research Program of the Chinese Academy of Sciences(Grant No.KZZD-EW-05-01) the Youth Foundation of the Institute of Mountain Hazards and Environment,CAS(Grant No.SDS-QN-1302) Youth Foundation of Key Laboratory of Mountain Hazards and Earth Surface Process,CAS 

主　　题：Debris flow Landslide dams Domino failures Enlargement of debris flow Mean velocity 

摘      要：The formation of landslide dams is often induced by earthquakes in mountainous *** failure of a landslide dam typically results in catastrophic flash floods or debris flows *** attention has been given to the processes and mechanisms involved in the failure of individual landslide ***,the processes leading to domino failures of multiple landslide dams remain *** this study,experimental tests were carried out to investigate the domino failure of landslide dams and the consequent enlargement of downstream debris *** blockage conditions were considered,including complete blockage,partial blockage and erodible bed(no blockage).The mean velocity of the flow front was estimated by *** stress transducers(TSTs)and Laser range finders(LRFs) were employed to measure the total stress and the depth of the flow front,*** a complete blockage pattern,a portion of the debris flow was trapped in front of each retained landslide dam before the latter collapsed *** was accompanied by a dramatic decrease in the mean velocity of the flow ***,under both partial blockage and erodible bed conditions,the mean velocity of the flow front increased gradually downward along the sloping *** failures of the landslide dams were triggered when a series of dams(complete blockage and partial blockage) were distributed along the ***,not all of these domino failures led to enlarged debris *** modes of dam failures have significant impacts on the enlargement of debris ***,further research is necessary to understand the mechanisms of domino failures of landslide dams and their effects on the enlargement of debris flows.