Experimental analysis for the dynamic initiation mechanism of debris flows

doi:10.1007/s11629-014-3258-z

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Experimental analysis for the dynamic initiation mechanism of debris flows
	Li C; Zhu WH; Li L; Lu XB(鲁晓兵); Yao D; Amini F; Li, C (reprint author), Inner Mongolia Univ Technol, Coll Civil Engn, Inner Mongolia 010051, Hohhot, Peoples R China.
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2016
卷号	13 期号:4 页码:581-592
关键词	Mountain Hazard Debris Flows Initiation Mechanism Humidification Process Rainfall Earthquake Triaxial Test
ISSN号	1672-6316
DOI	10.1007/s11629-014-3258-z
产权排序	[Li Chi; Zhu Wen-hui; Yao De] Inner Mongolia Univ Technol, Coll Civil Engn, Inner Mongolia 010051, Hohhot, Peoples R China; [Li Lin; Amini, Farshad] Jackson State Univ, Dept Civil & Environm Engn, Jackson, MS 39217 USA; [Lu Xiao-bing] Chinese Acad Sci, Inst Mech, Beijing 100084, Peoples R China
文献子类	期刊论文
英文摘要	Debris flow is one of the major secondary mountain hazards following the earthquake. This study explores the dynamic initiation mechanism of debris flows based on the strength reduction of soils through static and dynamic triaxial tests. A series of static and dynamic triaxial tests were conducted on samples in the lab. The samples were prepared according to different grain size distribution, degree of saturation and earthquake magnitudes. The relations of dynamic shear strength, degree of saturation, and number of cycles are summarized through analyzing experimental results. The findings show that the gravelly soil with a wide and continuous gradation has a critical degree of saturation of approximately 87%, above which debris flows will be triggered by rainfall, while the debris flow will be triggered at a critical degree of saturation of about 73% under the effect of rainfall and earthquake (M > 6.5). Debris flow initiation is developed in the humidification process, and the earthquake provides energy for triggering debris flows. Debris flows are more likely to be triggered at the relatively low saturation under dynamic loading than under static loading. The resistance of debris flow triggering relies more on internal frication angle than soil cohesion under the effect of rainfall and earthquake. The conclusions provide an experimental analysis method for dynamic initiation mechanism of debris flows.
分类号	Q4
URL标识	查看原文
WOS关键词	Mountain hazard ; Debris flows ; Initiation mechanism ; Humidification process ; Rainfall ; Earthquake ; Triaxial test
WOS研究方向	Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000373882400002
资助机构	This study was sponsored by Natural Science Foundation of China (Grant No. 51269012) and Major Projects of Natural Science Foundation of Inner Mongolia Autonomous Region (Grant No. ZD0602), and it is also part of National Project 973 "Wenchuan Earthquake Mountain Hazards Formation Mechanism and Risk Control" (Grant No. 2008CB425800). The corresponding author was also funded by "New Century Excellent Talents" of University of Ministry of Education of China (Grant No. NCET-11-1016) and China Scholarship Council.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59548]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Li, C (reprint author), Inner Mongolia Univ Technol, Coll Civil Engn, Inner Mongolia 010051, Hohhot, Peoples R China.
推荐引用方式 GB/T 7714	Li C,Zhu WH,Li L,et al. Experimental analysis for the dynamic initiation mechanism of debris flows[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(4):581-592.
APA	Li C.,Zhu WH.,Li L.,鲁晓兵.,Yao D.,...&Li, C .(2016).Experimental analysis for the dynamic initiation mechanism of debris flows.JOURNAL OF MOUNTAIN SCIENCE,13(4),581-592.
MLA	Li C,et al."Experimental analysis for the dynamic initiation mechanism of debris flows".JOURNAL OF MOUNTAIN SCIENCE 13.4(2016):581-592.