Page 175 - 《水资源与水工程学报》2023年第2期
P. 175
!34 " ! 2 # & ' ( ) & * + , - Vol.34No.2
2023 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2023
DOI:10.11705/j.issn.1672-643X.2023.02.22
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GHIJK:TV641 LMNOP:A LQRK:1672643X(2023)02017109
Simulationofseepageinsaturated-unsaturatedearth-rockdam
basedonelementfreeGalerkinmethod
3
1,2
4
3
1
DAIQianwei ,ZHUZelong,HANXingjin,LIUJie,LEIYi
(1.SchoolofGeosciencesandInfophysics,CentralSouthUniversity,Changsha410083,China;2.KeyLaboratoryof
MetallogenicPredictionofNonferrousMetalsandGeologicalEnvironmentMonitoring,MinistryofEducation,Central
SouthUniversity ,Changsha410083,China;3.WulingElectricPowerCo.,Ltd.,Changsha410004,China;
4.SchoolofCivilEngineering,CentralSouthUniversity,Changsha410075,China)
Abstract:Intheseepageforwardmodelingofearth-rockdams,thestudyofseepagefieldinsaturated
areaalonecannotfullyreflecttheundergroundseepagestateofearth-rockdams ,theunsaturatedseep
agefieldisjustasimportant.Here ,thesaturated-unsaturatedseepagefieldissolvedbytheelement
freeGalerkinmethod.Firstly ,theseepageequationandboundaryconditionsarederivedfromDarcy’s
law ,andtheelementfreeGalerkinmethodisderivedindetail.TheessenceofGalerkinmethodisto
constructaformfunctionbymovingleastsquaresmethod ,andtocalculatetheboundaryconditionsby
penaltyfunction.Then ,theaccuracyandeffectivenessofthemethodareprovedbycomparingtheresults
ofthesaturatedseepagefieldandthesaturated-unsaturatedseepagefieldcalculatedbyGeoStudio.Fi
nally ,thedistributionofzeropressureline,waterheadvalue,porepressureandwatercontentinthe
dambodyisstudiedbydifferenthomogeneousandheterogeneousmodels.TheelementfreeGalerkin
methodonlyrequiresnodestoachieveaccurateapproximationofthewholedomainseepagefield,which
eliminatesthedependenceongridcells.Comparedwithothernumericalmethods ,thismethodhasthe
advantagesofsimpleearlyprocessingdataandhighprecision,soitismoresuitableforthecomplexfor
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