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Experimental study on the moving characteristics of fine grains in wide grading unconsolidated soil under heavy rainfall
文献类型：期刊论文
| 作者 | CUI Yi-fei; ZHOU Xiao-jun; GUO Chao-xu
|
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2017-03 |
| 卷号 | 14期号:3页码:417-431 |
| 关键词 | Wide Grading Unconsolidated Soil Fine Particle Migration Soil Failure Landslide Debris Flow Initiation Flume Test Heavy Rainfall |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-016-4303-x |
| 通讯作者 | CUI Yi-fei |
| 文献子类 | 期刊论文 |
| 英文摘要 | The initiation mechanism of debris flow is regarded as the key step in understanding the debris-flow processes of occurrence, development and damage. Moreover, migration, accumulation and blocking effects of fine particles in soil will lead to soil failure and then develop into debris flow. Based on this hypothesis and considering the three factorsof slope gradient, rainfall duration and rainfall intensity, 16 flume experiments were designed using the method of orthogonal design and completed in a laboratory. Particle composition changes in slope toe, volumetric water content, fine particle movement characteristics and soil failure mechanism were analyzed and understood as follows:the soil has complex, random and unstable structures, which causes remarkable pore characteristics of poor connectivity, non-uniformity and easy variation. The major factors that influence fine particle migration are rainfall intensity and slope. Rainfall intensity dominates particle movement, whereby high intensity rainfall induces a large number of mass movement and sharp fluctuation, causing more fine particles to accumulate at the steep slope toe. The slope toe plays an important role in water collection and fine particle accumulation. Both fine particle migration and coarse particle movement appears similar fluctuation. Fine particle migration is interrupted in unconnected pores, causing pore blockage and fine particle accumulation, which then leads to the formation of a weak layerand further soil failure or collapses. Fine particle movement also causes debris flow formation in two ways: movement on the soil surface and migration inside the soil. The results verify the hypothesis that the function of fine particle migration in soil failure process is conducive for further understanding the formation mechanism of soil failure and debris flow initiation. |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/18431]  |
| 专题 | Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.3 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 |
| 推荐引用方式 GB/T 7714 | CUI Yi-fei,ZHOU Xiao-jun,GUO Chao-xu. Experimental study on the moving characteristics of fine grains in wide grading unconsolidated soil under heavy rainfall[J]. Journal of Mountain Science,2017,14(3):417-431. |
| APA | CUI Yi-fei,ZHOU Xiao-jun,&GUO Chao-xu.(2017).Experimental study on the moving characteristics of fine grains in wide grading unconsolidated soil under heavy rainfall.Journal of Mountain Science,14(3),417-431. |
| MLA | CUI Yi-fei,et al."Experimental study on the moving characteristics of fine grains in wide grading unconsolidated soil under heavy rainfall".Journal of Mountain Science 14.3(2017):417-431. |
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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