Effects of near-surface environmental conditions on instability of an unsaturated soil slope

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dc.contributor.authorBlatz, JA
dc.contributor.authorFerreira, NJ
dc.contributor.authorGraham, J
dc.date.accessioned2007-09-10T11:47:27Z
dc.date.available2007-09-10T11:47:27Z
dc.date.issued2004-12-03T11:47:27Z
dc.description.abstractIn 1999, after a period of extensive rainfall, two shallow slope failures developed in the right-of-way of Provincial Road 259 near Virden, Manitoba. The rainfall caused dissipation of soil suction in the near-surface soil, thereby reducing shear resistance and triggering failure. A research project was initiated between the Geotechnical Group at the University of Manitoba and the Manitoba Department of Highways and Transportation to assess the mechanism of failure. The project included a field investigation program, laboratory testing program, and advanced numerical modeling to identify the cause of failure. The results demonstrate that the rainfall resulted in dissipation of the suction in the soil slope, resulting in a reduction in the soil shear strength that triggered shallow failures. The dissipation of the soil suction has been modeled using a time-dependent seepage model that accounts for the flux boundary condition that existed at the ground surface.en
dc.format.extent1671029 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citation0008-3674; CAN GEOTECH J, DEC 2004, vol. 41, no. 6, p.1111 to 1126.en
dc.identifier.doihttp://dx.doi.org/10.1139/t04-058
dc.identifier.urihttp://hdl.handle.net/1993/2801
dc.language.isoengen_US
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dc.rightsopen accessen_US
dc.statusPeer revieweden
dc.subjectslope stabilityen
dc.subjectunsaturated soilsen
dc.subjectlaboratory testsen
dc.subjectsoil suctionen
dc.subjectseepage modelingen
dc.subjectflux boundaryen
dc.subjectSHEAR-STRENGTHen
dc.subjectSUCTIONen
dc.subjectSTABILITYen
dc.subjectLANDSLIDEen
dc.subjectMODELen
dc.subjectTILLen
dc.titleEffects of near-surface environmental conditions on instability of an unsaturated soil slopeen
dc.typejournal articleen_US
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