IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses
Weigang Shen1; Tao Zhao1; Jidong Zhao2; Feng Dai1; Gordon G.D. Zhou3
Corresponding AuthorTao Zhao
2018
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
EISSN1872-6917
Volume241Pages:86-96
SubtypeArticle
Contribution Rank3
AbstractThis study investigates the interaction between dry debris flows and a rigid barrier through discrete element modeling (DEM) of flume tests. The debris materials were modeled as an assembly of loosely packed spherical particles and the rigid barrier was represented by a layer of fixed particles. The numerical model was validated by comparing the numerical results with the experimental data reported in the literature, in terms of the debris flow morphology and evolution of impact forces acting on the rigid barrier. This model was further employed to examine the influence of barrier slope on the debris-barrier interactions. Based on the numerical results, three interaction stages were identified, namely the frontal impact, run-up and pile-up. The maximum impact force measured in this study exhibits a power law dependence on the barrier slope. In addition, during the impact process, the majority of initial total energy was dissipated by particle-particle and particle-flume interactions, while only a negligibly small amount of energy was dissipated by particle-barrier interaction. The numerical results also indicate that long spreading debris flows are very effective in facilitating energy dissipation, diminishing the impact force acting on the rigid barrier. These considerations can finally contribute to the design of effective debris flow barriers.
KeywordDebris flow Rigid barrier Discrete element method Barrier slope Impact force
DOI10.1016/j.enggeo.2018.05.011
Indexed BySCI
Language英语
Quartile3区
TOP
WOS IDWOS:000436219400009
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23418
Collection山地表生过程与生态调控重点实验室
山地灾害与地表过程重点实验室
Affiliation1.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China;
2.Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;
3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Ministry of Water Conservancy, Chengdu 610041, China
Recommended Citation
GB/T 7714
Weigang Shen,Tao Zhao,Jidong Zhao,et al. Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses[J]. ENGINEERING GEOLOGY,2018,241:86-96.
APA Weigang Shen,Tao Zhao,Jidong Zhao,Feng Dai,&Gordon G.D. Zhou.(2018).Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses.ENGINEERING GEOLOGY,241,86-96.
MLA Weigang Shen,et al."Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses".ENGINEERING GEOLOGY 241(2018):86-96.
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