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Surge impact behavior of granular flows: effects of water content
Zhou, G. G. D.1,2; Song, D.1,2; Choi, C. E.3,4; Pasuto, A.5; Sun, Q. C.6; Dai, D. F.7
2018
Source PublicationLANDSLIDES
ISSN1612-510X
EISSN1612-5118
Volume15Issue:4Pages:695-709
SubtypeArticle
Contribution Rank1
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.

KeywordGranular Flows Impact Behavior Water Content Discrete Surges Matric Suction
DOI10.1007/s10346-017-0908-6
Indexed BySCI
WOS KeywordParticle-size Segregation ; Debris Flows ; Unsaturated Soils ; Avalanches ; Runout ; Model ; Simulation ; Barrier ; Mass
Language英语
Quartile2区
Funding ProjectNational 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
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000427972300006
Funding OrganizationNational 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
PublisherSPRINGER HEIDELBERG
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/22972
Collection山地灾害与地表过程重点实验室
Corresponding AuthorSong, D.
Affiliation1.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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