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Experiment and analysis of slope failure of debris-flow fans
Language英语
Zhu, YY; Cui, P
2007
Source PublicationDEBRIS-FLOW HAZARDS MITIGATION: MECHANICS, PREDICTION, AND ASSESSMENT
Author of SourceChen, CL ; Major, JJ
Pages305-315
meeting4th International Conference on Debris-Flow Hazards Mitigation - Mechanics, Prediction, and Assessment
Conference DateSEP 10-13, 2007
Conference PlaceChengdu
CountryPEOPLES R CHINA
Publication PlaceROTTERDAM
PublisherMILLPRESS SCIENCE PUBLISHERS
Contribution Rank1
AbstractFailure of debris flow fan is distinct from the common rock and soil slope failure due to the unique geotechnical features of debris flow sediment. However, this type of failure has not been comprehensively and systematically studied in the past. In our recent research, a practical subroutine is developed to interpret the slope stability using a Visual Basic application embedded in Microsoft Excel. The Spencer slicing method with varying physical parameters along the slice depth is used to search for the noncircular critical slip surface from a calculated circular critical slip surface. This is done using spreadsheet-automated constrained optimization. The results are then compared with in situ observed slip surface. The in situ experiment indicated that the water content hardly changed at a depth of 50 cm beneath the surface after a period of concentrated artificial rainfall, but the landslide failed anyway. With the increase in height of the soil layer, the calculated safety factor gradually decreased and an optimized noncircular slip surface with an average height of 2.4 m was obtained satisfying all the constraints and assumptions. However, there was a discrepancy between the calculated slip Surface and the actual sliding surface, despite using parameters adopted from the in situ experiment and laboratory testing. Briefly, the method of slices to perform slope stability analysis for investigating slope failure of debris flow fans was unsuccessful due mainly to inconsistencies between the stability analysis and experimental observation.
Keyworddebris flow fan slope failure field experiment stability analysis
ISBN978-90-5966-059-5
Indexed ByEI ; CPCI
Accession numberAccession number:20085211816259
WOS IDWOS:000267333300030
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33493
Collection成都山地所知识仓储(2009年以前)
山地灾害与地表过程重点实验室
Corresponding AuthorZhu, YY
AffiliationChinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, 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
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Zhu, YY,Cui, P. Experiment and analysis of slope failure of debris-flow fans[C]//Chen, CL, Major, JJ. ROTTERDAM:MILLPRESS SCIENCE PUBLISHERS,2007:305-315.
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