IMHE OpenIR  > 山地灾害与地表过程重点实验室
Potential Initiation of Debris Flow after an Earthquake
Yuhua Zou1; Gao Quan2
Corresponding AuthorYuhua Zou
2015-05
Source PublicationElectronic Journal of Geotechnical Engineering
ISSN1089-3032
Volume20Issue:9Pages:3751-3760
Abstract

The potential initiation of debris flow after outbreak of an earthquake is widely concerned by the society. This paper aims at investigating on initiation of loose gravelly clay deposit after earthquake using seepage and general limit equilibrium coupled method. The study area is the source area of debris flow in Weijia River basin, Wenchuan, Southwestern China where series of debris flows occurred after the May 12th 2008 Wenchuan Earthquake. A simplified model of gravelly clay slope under different consolidate durations and rainfall intensities was simulated using finite element method. The pore water pressure distributions in the slope at different consolidate durations were obtained by seepage analysis. And the stability of the slopes with different consolidate durations under different rainfall intensities were analyzed. The results show that the consolidation of gravelly clay deposit after an earthquake has a considerable influence on the shear strength index and the permeability coefficient of the loose deposit at earthquake area. The pore water pressures and hydraulic gradient at outflow point of the slope toe increase with the increase in the consolidate duration of the slope soil. The minimum factor of safety or the stability of gravelly clay slope decreases with the increase in the consolidate duration of loose deposit soil within the tested three years which suggest that the consolidation and changes in permeability and strength of loose deposit soil increases the potential of initiation of debris flow in the earthquake affected area during the period.

KeywordDebris Flow Initiation Pore Water Pressure Minimum Factor Of Safety Wenchuan Earthquake
Subject Area地球科学
Indexed ByEI
Language英语
Accession numberAccession number: 20151900837778
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10956
Collection山地灾害与地表过程重点实验室
Affiliation1.Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and Environment, CAS
2.Case Western Reserve University, 10900 Euclid Ave, Cleveland; OH, United States
First 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
Yuhua Zou,Gao Quan. Potential Initiation of Debris Flow after an Earthquake[J]. Electronic Journal of Geotechnical Engineering,2015,20(9):3751-3760.
APA Yuhua Zou,&Gao Quan.(2015).Potential Initiation of Debris Flow after an Earthquake.Electronic Journal of Geotechnical Engineering,20(9),3751-3760.
MLA Yuhua Zou,et al."Potential Initiation of Debris Flow after an Earthquake".Electronic Journal of Geotechnical Engineering 20.9(2015):3751-3760.
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