Surge impact behavior of granular flows: effects of water content | |
Zhou, G. G. D.1,2; Song, D.1,2![]() | |
2018 | |
Source Publication | LANDSLIDES
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ISSN | 1612-510X |
EISSN | 1612-5118 |
Volume | 15Issue:4Pages:695-709 |
Subtype | Article |
Contribution Rank | 1 |
Abstract | Understanding the fundamental dynamics of interaction between multi-phase geophysical flows and engineering structures is crucial for mitigating geophysical hazards. Specifically, liquid phase between particles induces matric suction which could play a significant part in regulating flow dynamics and warrants further consideration. In this study, flume model tests were conducted to investigate the effects of water content (0-30%) on the impact behavior of granular flows. The particle image velocimetry technique was adopted to visualize the impact kinematics and the impact force was measured through a model barrier system. Results revealed that, besides geometric effects (kinetic sieving), mechanical effects (shearing and collision) are also vital for the mechanism of reverse segregation. At higher water contents, 20 and 30% in this study, discrete-surge impact, rather than a progressive impact process, was observed. The discrete surges induce impulses on the barrier. The discrete surges result from self-organization of unsaturated granular flows to overcome the enhanced shear strength induced by matric suction. Finally, a dimensionless index, namely the suction number, is used to quantify the effect of suction on the dynamic behavior of granular flows. Even for large-scale geophysical flows, if the content of fine particles is high, effect of suction should not be neglected. |
Keyword | Granular Flows Impact Behavior Water Content Discrete Surges Matric Suction |
DOI | 10.1007/s10346-017-0908-6 |
Indexed By | SCI |
WOS Keyword | Particle-size Segregation ; Debris Flows ; Unsaturated Soils ; Avalanches ; Runout ; Model ; Simulation ; Barrier ; Mass |
Language | 英语 |
Quartile | 2区 |
Funding Project | National Natural Science Foundation of China[11672318] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; Research Grants Council of the Government of Hong Kong SAR, China[T22-603/15-N] ; International Partnership Program of Chinese Academy of Sciences[131551KYSB20160002] ; Youth Innovation Promotion Association CAS ; CAS Pioneer Hundred Talents Program |
TOP | 是 |
WOS Research Area | Engineering ; Geology |
WOS Subject | Engineering, Geological ; Geosciences, Multidisciplinary |
WOS ID | WOS:000427972300006 |
Funding Organization | National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; Research Grants Council of the Government of Hong Kong SAR, China ; International Partnership Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; CAS Pioneer Hundred Talents Program |
Publisher | SPRINGER HEIDELBERG |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.imde.ac.cn/handle/131551/22972 |
Collection | 山地灾害与地表过程重点实验室 |
Corresponding Author | Song, D. |
Affiliation | 1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China 4.Hong Kong Univ Sci & Technol, HKUST Jockey Club Inst Adv Study, Kowloon, Hong Kong, Peoples R China 5.Natl Res Council Italy, Res Inst Geol & Hydrol Hazard Prevent, Padua, Italy 6.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing, Peoples R China 7.Kunming Dongchuan Debris Flow Prevent & Control I, Kunming, Yunnan, Peoples R China |
First Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
Corresponding Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
Recommended Citation GB/T 7714 | Zhou, G. G. D.,Song, D.,Choi, C. E.,et al. Surge impact behavior of granular flows: effects of water content[J]. LANDSLIDES,2018,15(4):695-709. |
APA | Zhou, G. G. D.,Song, D.,Choi, C. E.,Pasuto, A.,Sun, Q. C.,&Dai, D. F..(2018).Surge impact behavior of granular flows: effects of water content.LANDSLIDES,15(4),695-709. |
MLA | Zhou, G. G. D.,et al."Surge impact behavior of granular flows: effects of water content".LANDSLIDES 15.4(2018):695-709. |
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