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波浪作用下黄河口粉质土海床液化深度研究.docx

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波浪作用下黄河口粉质土海床液化深度研究 Abstract LiquefactionofthesoftoceanfloorsedimentsatthemouthoftheYellowRiverposesacriticalrisktohumanlifeandinfrastructure.Inthispaper,wepresentacomprehensivestudyofthedepthofsedimentliquefactionunderwaveactionatthemouthoftheYellowRiver.Wefocusedontheinfluenceofwaveheight,waveperiod,soilpropertiesaswellasdensityontheextentoftheliquefaction.Aseriesofexperimentswereconductedusingashakingtablewithdifferentwaveheightsandperiodstosimulatethewaveactiononthesoftmarinesediments.Theresultsshowthatliquefactiondepthincreaseswithanincreaseinwaveheightandperiod.Moreover,soilpropertiessuchasthegrainsizedistribution,finescontentanddensitysignificantlyimpacttheextentoftheliquefaction.Thefindingsfromthisstudymayprovidevaluableinsightsforfutureengineeringdesignsandriskassessments. Introduction TheYellowRiveristhesecond-longestriverinChinaandposesasignificantrisktosettlementsandinfrastructureatitsmouth.Theriverdelta,comprisingvastsoftmarinesediments,isgreatlyimpactedbywaveactions,leveebreaches,andfluvialfloods.Theliquefactionofthesesedimentsunderwaveactioncanleadtoseveredamage,subsidence,andevenlossoflife.Therefore,thestudyoftheextentofliquefactionofmarinesedimentsunderwaveactioniscriticalforinfrastructuredevelopmentandriskassessments. Liquefactionisaphenomenonofsoilinstabilitythatoccurswhentheeffectivestressonthesoilisreducedtoacriticallevelduetodynamicloadingorhighporewaterpressure.Marinesedimentscanbehighlysusceptibletoliquefaction,makingtheproblemmoresevereandchallengingtocontrol.Underwaveaction,marinesedimentsexperiencecyclicloading,inducingchangesinporewaterpressure,whichcanleadtoliquefaction.Hence,thedeterminationofliquefactionsusceptibilityiscrucialforthedesignofmarinestructures. Manyresearchershavestudiedsoil-liquefactioninmarinesedimentsundertheactionofwaves.Someofthesestudiesindicatedthatthedepthofliquefactionissignificantlyinfluencedbywavecharacteristics(Amirshahietal.,2018),soilproperties(Liuetal.,2015),anddensity(LiandLi,2019).However,thereisstillaneed