Enhanced mobility of polydisperse granular flows in a small flume
文献类型：期刊论文
| 作者 | Yang Qingqing1; Su ZM(苏志满)2 ; Fei Cai3; Keizo Ugai3
|
| 刊名 | Geoenvironmental Disasters
 |
| 出版日期 | 2015 |
| 卷号 | 2期号:1页码:1-10 |
| 关键词 | Polydisperse granular flow Run-out Deposit morphology Flume test |
| ISSN号 | 2197-8670 |
| 通讯作者 | Su Zhiman |
| 英文摘要 | Background: A series of laboratory tests was conducted to investigate the influence of the interaction between coarse and fine particles on the mobility of granular flows in a small flume. Methods: The angle of the upper slope was fixed at 45°, and the lower slope was inclined at angles of 0°, 5°, 10°, and 15° in different cases. Three monodisperse materials (gravel, coarse sand, and fine sand) were mixed, and the proportion of each material in each test was varied but maintained the same total mass of 3.0 kg. Results: Test results show that the proportion of fine sand strongly influenced the run-out of polydisperse materials. With increasing proportion of fine sand, the run-outs of granular flows increased until its peak. However, the run-outs decreased with further more fine sand. Discussion: The reason might be that a thin layer of fine sand acted as rollers for the rolling of the gravel, leading to the reduction of effective friction resistance during the movement; when excessive amount of fine sand was involved, these rollers were thrown into disarray so that the particles were either blocked or forced into sliding. Conclusion: This implies that an appropriate proportion of fine particles were partly responsible for the long run-out of rock avalanches. |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/13902]  |
| 专题 | 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 |
| 作者单位 | 1.Southwest Jiaotong University 2.中国科学院成都山地灾害与环境研究所 3.Department of Environmental Engineering Science, Gunma University, Kiryu, 376-8515, Japan |
| 推荐引用方式 GB/T 7714 | Yang Qingqing,Su ZM,Fei Cai,et al. Enhanced mobility of polydisperse granular flows in a small flume[J]. Geoenvironmental Disasters,2015,2(1):1-10. |
| APA | Yang Qingqing,Su ZM,Fei Cai,&Keizo Ugai.(2015).Enhanced mobility of polydisperse granular flows in a small flume.Geoenvironmental Disasters,2(1),1-10. |
| MLA | Yang Qingqing,et al."Enhanced mobility of polydisperse granular flows in a small flume".Geoenvironmental Disasters 2.1(2015):1-10. |
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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