Mechanism of the progressive failure of non-cohesive natural dam slopes

doi:10.1016/j.geomorph.2020.107198

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Mechanism of the progressive failure of non-cohesive natural dam slopes
	Jiang Xiangang 1,5; Worman Anders 4; Chen Pengshuai 1; Huang Qin 1; Chen Huayong 2,3
刊名	GEOMORPHOLOGY
	2020
卷号	363 页码:UNSP 107198
关键词	Natural dam Progressive failure Seepage flow Estimation method
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2020.107198
通讯作者	Jiang, Xiangang(41446@sicau.edu.cn)
产权排序	4
文献子类	Article
英文摘要	Progressive failure, which begins in the downstream slopes of dams, is one of the main failure modes for natural dams in the field. However, this failure mode lacks attention in the scientific literature, especially regarding its formation mechanism. In this paper, flume tests were conducted to simulate the progressive failure of a natural dam. The results show that the progressive failure process is induced by seepage water discharging on the downstream slope, including the erosion of individual soil particles, repeated minor slip failures, upward head-cutting erosion of the dam crest, and finally the collapse of the dam when the processes have evolved sufficiently. This study focuses on analyzing the initiation mechanism of soil particle migration. The influence of seepage and interflow stresses on the incipient erosion of soil particles is analyzed. In addition, the buoyancy of soil particles on the downstream slope surface is not considered in the vertical direction in this paper but in the direction perpendicular to the downstream slope surface. The paper also discusses how to estimate the occurrence of the progressive failure of a natural dam. In the estimation method, the stress of the interfacial flow, the seepage flow stress, and the friction stress of the soil particles are considered when the phreatic line reaches the downstream slope surface. (C) 2020 Elsevier B.V. All rights reserved.
电子版国际标准刊号	1872-695X
资助项目	National Natural Science Foundation of China[41807289] ; National Natural Science Foundation of China[41771045] ; Open fund of Key Laboratory of Mountain Hazards and Surface Processes, Chinese Academy of Sciences[KLMHESP-17-05] ; Sichuan province fundamental scientific research[18ZA0374]
WOS关键词	LANDSLIDE DAMS ; SEDIMENT ; EROSION
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000538796700001
资助机构	National Natural Science Foundation of China ; Open fund of Key Laboratory of Mountain Hazards and Surface Processes, Chinese Academy of Sciences ; Sichuan province fundamental scientific research
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34902]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Jiang Xiangang
作者单位	1.College of Civil Engineering, Sichuan Agricultural University, DuJiangyan, Chengdu 611830, China; 2.CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China 3.Key Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu 610041, China 4.The Royal Institute of Technology, Division of River Engineering, 10044 Stockholm, Sweden; 5.Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, DuJiangyan, Chengdu 611830, China;
推荐引用方式 GB/T 7714	Jiang Xiangang,Worman Anders,Chen Pengshuai,et al. Mechanism of the progressive failure of non-cohesive natural dam slopes[J]. GEOMORPHOLOGY,2020,363:UNSP 107198.
APA	Jiang Xiangang,Worman Anders,Chen Pengshuai,Huang Qin,&Chen Huayong.(2020).Mechanism of the progressive failure of non-cohesive natural dam slopes.GEOMORPHOLOGY,363,UNSP 107198.
MLA	Jiang Xiangang,et al."Mechanism of the progressive failure of non-cohesive natural dam slopes".GEOMORPHOLOGY 363(2020):UNSP 107198.