IMECH-IR  > 流固耦合系统力学重点实验室
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.
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
2016
Volume13Issue:4Pages:581-592
ISSN1672-6316
AbstractDebris 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.
KeywordMountain Hazard Debris Flows Initiation Mechanism Humidification Process Rainfall Earthquake Triaxial Test
DOI10.1007/s11629-014-3258-z
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000373882400002
WOS KeywordMountain hazard ; Debris flows ; Initiation mechanism ; Humidification process ; Rainfall ; Earthquake ; Triaxial test
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationThis 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.
DepartmentLMFS海洋土力学(LHO)
ClassificationQ4
RankingFalse
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59548
Collection流固耦合系统力学重点实验室
Corresponding AuthorLi, C (reprint author), Inner Mongolia Univ Technol, Coll Civil Engn, Inner Mongolia 010051, Hohhot, Peoples R China.
Recommended Citation
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.
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