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干湿循环效应对膨胀性土边坡稳定性影响分析.docx

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干湿循环效应对膨胀性土边坡稳定性影响分析 Title:AnalysisoftheEffectsofWet-DryCycleontheStabilityofExpansiveSoilSlopes Abstract: Expansivesoils,commonlyknownasswellingsoils,possessuniquepropertiesthatcansignificantlyimpactthestabilityofslopes,suchasembankmentsorcuttings.Onecrucialfactorthatinfluencesthemechanicalbehaviorofexpansivesoilslopesisthewet-drycycleeffect.Thispaperaimstoanalyzetheeffectsofwet-drycyclesonthestabilityofexpansivesoilslopes.Itdiscussesthefundamentalpropertiesofexpansivesoils,themechanismsinvolvedinthewet-drycycleeffect,andthepotentialconsequencesonslopestability.Furthermore,thispaperalsosuggestspossiblemitigationmeasurestoensurethesafedesignofexpansivesoilslopesunderwet-dryconditions. Keywords:expansivesoil,wet-drycycle,slopestability,embankment,cutting 1.Introduction Expansivesoilsarecommoninmanyregionsworldwideandposesignificantchallengesinengineeringprojectsinvolvingslopestability.Thesesoilshavethepropensitytoswellandshrinkduetowaterabsorptionanddesiccation,respectively,leadingtodetrimentaleffectsonstructuresbuiltonornearthem.Thewet-drycycleeffectisanimportantaspectthataltersthephysicalandmechanicalpropertiesofthesesoilsovertime.Understandingtheimpactofwet-drycyclesonthestabilityofexpansivesoilslopesiscrucialforeffectiveslopedesignandmaintenance. 2.ExpansiveSoilProperties Expansivesoilsarecharacterizedbytheirabilitytoundergovolumetricchangeswhensubjectedtovariationsinmoisturecontent.Whenexposedtomoisture,thesesoilsswell,therebyincreasinginvolume.Conversely,whenthemoisturecontentreduces,suchasindryconditions,theyshrink,causingsignificantvolumetriccontraction.Thesechangesinvolumeintroduceconsiderablestressvariationswithinthesoilmass,leadingtopotentialinstabilityofslopesbuiltonexpansivesoils. 3.MechanismsofWet-DryCycleEffect Thewet-drycycleeffectinexpansivesoilsinvolvesvariousmechanismsthatimpactslopestability.Duringwetting,thesoilabsorbswaterandswells,increasingporewaterpressureandreducingthesoil'sshearstrength.Ontheotherhand,duringthedryingphase,soilshrinkageoccur