IMHE OpenIR  > 山地灾害与地表过程重点实验室
Enhanced mobility of polydisperse granular flows in a small flume
Yang Qingqing1; Su ZM(苏志满)2; Fei Cai3; Keizo Ugai3
Corresponding AuthorSu Zhiman
2015
Source PublicationGeoenvironmental Disasters
ISSN2197-8670
Volume2Issue:1Pages:1-10
AbstractBackground: 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.
KeywordPolydisperse Granular Flow Run-out Deposit Morphology Flume Test
DOI10.1186/s40677-015-0019-4
Language英语
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/13902
Collection山地灾害与地表过程重点实验室
Affiliation1.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
Recommended Citation
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.
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