Experimental analysis for the dynamic initiation mechanism of debris flows
文献类型：期刊论文
| 作者 | LI Chi; ZHU Wen-hui; LI Lin; LU Xiao-bing; YAO De; Farshad AMINI |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2016-04 |
| 卷号 | 13期号:4页码:581-592 |
| ISSN号 | 1672-6316 |
| 关键词 | Mountain hazard Debris flows Initiation mechanism Humidification process Rainfall Earthquake Triaxial test |
| 通讯作者 | LI Chi |
| 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 rainfalland 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-04-26 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/15037]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.4 |
| 推荐引用方式 GB/T 7714 | LI Chi,ZHU Wen-hui,LI Lin,et al. Experimental analysis for the dynamic initiation mechanism of debris flows[J]. Journal of Mountain Science,2016,13(4):581-592. |
| APA | LI Chi,ZHU Wen-hui,LI Lin,LU Xiao-bing,YAO De,&Farshad AMINI.(2016).Experimental analysis for the dynamic initiation mechanism of debris flows.Journal of Mountain Science,13(4),581-592. |
| MLA | LI Chi,et al."Experimental analysis for the dynamic initiation mechanism of debris flows".Journal of Mountain Science 13.4(2016):581-592. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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