| 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.
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| 发表期刊 | JOURNAL OF MOUNTAIN SCIENCE
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| 2016
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| 卷号 | 13期号:4页码:581-592 |
| ISSN | 1672-6316
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| 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. |
| 关键词 | Mountain Hazard
Debris Flows
Initiation Mechanism
Humidification Process
Rainfall
Earthquake
Triaxial Test
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| DOI | 10.1007/s11629-014-3258-z
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| URL | 查看原文
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| 收录类别 | SCI
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| 语种 | 英语
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| WOS记录号 | WOS:000373882400002
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| 关键词[WOS] | Mountain hazard
; Debris flows
; Initiation mechanism
; Humidification process
; Rainfall
; Earthquake
; Triaxial test
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| WOS研究方向 | Environmental Sciences & Ecology
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| WOS类目 | Environmental Sciences
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| 项目资助者 | 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.
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| 课题组名称 | LMFS海洋土力学(LHO)
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| 论文分区 | Q4
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| 力学所作者排名 | False
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/59548
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| 专题 | 流固耦合系统力学重点实验室
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| 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.
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| 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.
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| 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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