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Hydraulic mechanism and time-dependent characteristics of loose gully deposits failure induced by rainfall
Yong Wu1,2,3; Siming He1,2
Corresponding AuthorYong Wu
2015
Source PublicationJournal of Rock Mechanics and Geotechnical
ISSN1674-7755
Volume7Issue:6Pages:708-715
Abstract

Failure of loose gully deposits under the effect of rainfall contributes to the potential risk of debris flow. In the past decades, researches on hydraulic mechanism and time-dependent characteristics of loose deposits failure are frequently reported, however adequate measures for reducing debris flow are not available practically. In this context, a time-dependent model was established to determine the changes of water table of loose deposits using hydraulic and topographic theories. In addition, the variation in water table with elapsed time was analyzed. The formulas for calculating hydrodynamic and hydrostatic pressures on each strip and block unit of deposit were proposed, and the slope stability and failure risk of the loose deposits were assessed based on the time-dependent hydraulic characteristics of established model. Finally, the failure mechanism of deposits based on infinite slope theory was illustrated, with an example, to calculate sliding force, anti-sliding force and residual sliding force applied to each slice. The results indicate that failure of gully deposits under the effect of rainfall is the result of continuously increasing hydraulic pressure and water table. The time-dependent characteristics of loose deposit failure are determined by the factors of hydraulic properties, drainage area of interest, rainfall pattern, rainfall duration and intensity.

KeywordHydraulic Mechanism Time-dependent Loose Gully Deposits Rainfall
DOI10.1016/j.jrmge.2015.09.003
URL查看原文
Language英语
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/13889
Collection山地灾害与地表过程重点实验室
Affiliation1.Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences, Chengdu, 610041, China
2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China
3.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China
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
Yong Wu,Siming He. Hydraulic mechanism and time-dependent characteristics of loose gully deposits failure induced by rainfall[J]. Journal of Rock Mechanics and Geotechnical,2015,7(6):708-715.
APA Yong Wu,&Siming He.(2015).Hydraulic mechanism and time-dependent characteristics of loose gully deposits failure induced by rainfall.Journal of Rock Mechanics and Geotechnical,7(6),708-715.
MLA Yong Wu,et al."Hydraulic mechanism and time-dependent characteristics of loose gully deposits failure induced by rainfall".Journal of Rock Mechanics and Geotechnical 7.6(2015):708-715.
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