Mechanism and modelling of shallow soil slope stability during high intensity and short duration rainfall

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dc.contributor.authorEgeli I.
dc.contributor.authorPulat H.F.
dc.date.accessioned2024-07-22T08:20:27Z
dc.date.available2024-07-22T08:20:27Z
dc.date.issued2011
dc.description.abstractShallow landslides in nearly saturated uncohesive to slightly cohesive soils are triggered by high intensity, short duration rainfall which infiltrates into soil and changes intergranular friction and effective stresses. For this, the especially developed SoilWater Interaction Modelling System (SWIMS) was used with CL-ML type soils. For simplicity, rainfall intensity and duration were kept constant. Results showed that (1) All 35° slopes were failed by translational failure. For the other (15°,25°) slopes, no failures were observed; (2) For all slopes, FOS increased with increasing compaction degree and decreased with increasing slope angle; (3) Other parameters, such as soil density, porosity, saturation degree, water contents, and water permeability may also affect shear strength/slope stability, especially for low degrees of saturation (S<95%), compared to high degrees of saturation (S=,>95%). (4) A correlation of SWIMS tests observed that average wetting band depths ( hobser), with the calculated wetting band depths from the Lump Equation (hLE), were poor, as hobser values were much higher than hLE values. Differences increased for very low degrees of saturation (S), compared to S>95%. This meant that the Lump equation underestimated wetting band depths. Further, if the Lump equation is still considered valid, this would imply either water-permeability increases, porosity decreases or both occur towards full saturation; a process where the last possibility is the most probable occurrence. © 2012 Sharif University of Technology. Production and hosting by Elsevier B.V. All rights reserved.
dc.identifier.DOI-ID10.1016/j.scient.2011.09.010
dc.identifier.issn10263098
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/18166
dc.language.isoEnglish
dc.publisherSharif University of Technology
dc.rightsAll Open Access; Gold Open Access
dc.subjectLandslides
dc.subjectPorosity
dc.subjectRain
dc.subjectSlope protection
dc.subjectSlope stability
dc.subjectSoils
dc.subjectTextures
dc.subjectWetting
dc.subjectMatric
dc.subjectOsmotic and total suctions
dc.subjectRainwater infiltrations
dc.subjectShallow landslide
dc.subjectSoilWater retension curves (SWRC)
dc.subjectUnsaturated soil
dc.subjectUnsaturated soil's shear strengths
dc.subjectcohesive soil
dc.subjectcompaction
dc.subjecteffective stress
dc.subjectfriction
dc.subjectinfiltration
dc.subjectlandslide
dc.subjectnumerical model
dc.subjectosmosis
dc.subjectrainfall
dc.subjectrainwater
dc.subjectsaturation
dc.subjectshallow soil
dc.subjectslope stability
dc.subjectsoil mechanics
dc.subjectsoil water
dc.subjectShear strength
dc.titleMechanism and modelling of shallow soil slope stability during high intensity and short duration rainfall
dc.typeArticle

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