IMHE OpenIR  > 山地灾害与地表过程重点实验室
Dynamic process analysis for the initiation and movement of the Donghekou landslide-debris flow triggered by the Wenchuan earthquake
Zhou, Jia-wen1,2; Cui, Peng3; Yang, Xing-guo1
Corresponding AuthorZhou, Jia-wen
2013
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
EISSN1878-5786
Volume76Issue:S1Pages:70-84
SubtypeArticle
AbstractThe Donghekou landslide-debris flow was a remarkable geological disaster triggered by the Wenchuan earthquake in 2008. The dynamic process of a rapid landslide-debris flow is very complicated and can be divided into two aspects: the slope dynamic response of the earthquake and the mass movement and accumulation process. A numerical method combined with a finite difference method (FDM) and discrete element method (DEM) for simulation of landslide-debris flow under seismic loading is presented. The FDM and DEM are coupled through the critical sliding surface, initiation time and velocity. The dynamic response of the slope is simulated by the finite difference method, and critical sliding surface is determined using the earthquake response spectrum method. The landslide initiation time and the velocity are determined by time-history analysis. The mass movement and accumulation process is simulated using the discrete element method. Simulation results demonstrate that the maximum amplification coefficient of dynamic acceleration for the Donghekou slope is approximately 3.909, the initiation time of landslide is approximately 6.0 s, and the average initial velocity of the sliding mass is approximately 0.85 m/s. The failure of the slope is the result of elevation-orientated amplification effect and the sliding mass triggered with a small initial velocity. The numerical simulated result of the maximum sliding velocity is approximately 66.35 m/s, and the mass is disintegrated rapidly because of collision and free fall. The landslide velocity decreases when the flowing mass reaches a lower slope angle and gradually comes to a stop, and the total travel distance is approximately 2400 m. (C) 2013 Elsevier Ltd. All rights reserved.
KeywordWenchuan Earthquake Landslide-debris Flow Initiation Time Mass Movement Numerical Simulation Dynamic Process
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jseaes.2013.08.007
WOS Subject ExtendedGeology
Indexed BySCI
WOS KeywordROCK AVALANCHES ; ROCKSLIDE ; FAILURE ; GRAVEL ; CHINA ; ALPS
Language英语
Quartile3区
TOP
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000326255500007
Funding OrganizationNational Natural Science Foundation of China(41030742 ; Opening fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2013K015) ; Science Foundation for Excellent Youth Scholars of Sichuan University(2013SCU04A07) ; 41102194)
Citation statistics
Cited Times:73[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/8305
Collection山地灾害与地表过程重点实验室
Affiliation1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
2.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China
3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610044, Peoples R China
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GB/T 7714
Zhou, Jia-wen,Cui, Peng,Yang, Xing-guo. Dynamic process analysis for the initiation and movement of the Donghekou landslide-debris flow triggered by the Wenchuan earthquake[J]. JOURNAL OF ASIAN EARTH SCIENCES,2013,76(S1):70-84.
APA Zhou, Jia-wen,Cui, Peng,&Yang, Xing-guo.(2013).Dynamic process analysis for the initiation and movement of the Donghekou landslide-debris flow triggered by the Wenchuan earthquake.JOURNAL OF ASIAN EARTH SCIENCES,76(S1),70-84.
MLA Zhou, Jia-wen,et al."Dynamic process analysis for the initiation and movement of the Donghekou landslide-debris flow triggered by the Wenchuan earthquake".JOURNAL OF ASIAN EARTH SCIENCES 76.S1(2013):70-84.
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