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Article: Causative mechanisms of rainfall-induced fill slope failures

TitleCausative mechanisms of rainfall-induced fill slope failures
Authors
KeywordsDead loads
Failures
Rainfall
Slopes
Soil suction
Unsaturated soils
Issue Date2004
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/gt.html
Citation
Journal Of Geotechnical And Geoenvironmental Engineering, 2004, v. 130 n. 6, p. 593-602 How to Cite?
AbstractSlope failures in fill slopes formed by loosely compacted, completely decomposed granite in Hong Kong occur commonly during intense tropical rainstorms. The stress path greatly influences the shear strength of the soil mass, and is therefore crucial to the identification of slope-failure mechanisms. The soil mass in this case is largely unsaturated. In situ hydrologic response to rainstorms indicates that soil suction is reduced by rainfall infiltration, which often becomes the triggering factor in initiating slope instability. The constant dead-load tests on unsaturated, loosely compacted, completely decomposed granite appropriately simulate the field stress path of rainfall-induced fill-slope failure by reducing suction. The tests indicate that matric suction contributes to the dilative or contractive behavior of the unsaturated soils. The anisotropically consolidated undrained triaxial tests demonstrate the consistently contractive behavior of the specimens. On this basis, we delineate the in situ stress conditions leading to the initiation of rainfall-induced fill-slope failure, and the stress paths of the transformation from local failures to flowage. Based on a systematic study of fill-slope case records in Hong Kong, implications of such mechanisms on fill-slope stability are given. © ASCE / JUNE 2004.
Persistent Identifierhttp://hdl.handle.net/10722/70630
ISSN
2015 Impact Factor: 1.696
2015 SCImago Journal Rankings: 2.344
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Hen_HK
dc.contributor.authorLee, CFen_HK
dc.contributor.authorLaw, KTen_HK
dc.date.accessioned2010-09-06T06:24:42Z-
dc.date.available2010-09-06T06:24:42Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of Geotechnical And Geoenvironmental Engineering, 2004, v. 130 n. 6, p. 593-602en_HK
dc.identifier.issn1090-0241en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70630-
dc.description.abstractSlope failures in fill slopes formed by loosely compacted, completely decomposed granite in Hong Kong occur commonly during intense tropical rainstorms. The stress path greatly influences the shear strength of the soil mass, and is therefore crucial to the identification of slope-failure mechanisms. The soil mass in this case is largely unsaturated. In situ hydrologic response to rainstorms indicates that soil suction is reduced by rainfall infiltration, which often becomes the triggering factor in initiating slope instability. The constant dead-load tests on unsaturated, loosely compacted, completely decomposed granite appropriately simulate the field stress path of rainfall-induced fill-slope failure by reducing suction. The tests indicate that matric suction contributes to the dilative or contractive behavior of the unsaturated soils. The anisotropically consolidated undrained triaxial tests demonstrate the consistently contractive behavior of the specimens. On this basis, we delineate the in situ stress conditions leading to the initiation of rainfall-induced fill-slope failure, and the stress paths of the transformation from local failures to flowage. Based on a systematic study of fill-slope case records in Hong Kong, implications of such mechanisms on fill-slope stability are given. © ASCE / JUNE 2004.en_HK
dc.languageengen_HK
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/gt.htmlen_HK
dc.relation.ispartofJournal of Geotechnical and Geoenvironmental Engineeringen_HK
dc.rightsJournal of Geotechnical and Geoenvironmental Engineering. Copyright © American Society of Civil Engineers.en_HK
dc.subjectDead loadsen_HK
dc.subjectFailuresen_HK
dc.subjectRainfallen_HK
dc.subjectSlopesen_HK
dc.subjectSoil suctionen_HK
dc.subjectUnsaturated soilsen_HK
dc.titleCausative mechanisms of rainfall-induced fill slope failuresen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1090-0241&volume=130&issue=6&spage=593&epage=602&date=2004&atitle=Causative+mechanisms+of+rainfall-induced+fill+slope+failuresen_HK
dc.identifier.emailLee, CF: leecf@hkucc.hku.hken_HK
dc.identifier.authorityLee, CF=rp00139en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)1090-0241(2004)130:6(593)en_HK
dc.identifier.scopuseid_2-s2.0-2942577461en_HK
dc.identifier.hkuros91458en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-2942577461&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume130en_HK
dc.identifier.issue6en_HK
dc.identifier.spage593en_HK
dc.identifier.epage602en_HK
dc.identifier.isiWOS:000221657100005-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChen, H=7501625581en_HK
dc.identifier.scopusauthoridLee, CF=8068602600en_HK
dc.identifier.scopusauthoridLaw, KT=7202563426en_HK

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