Page 160 - 《水资源与水工程学报》2022年第4期
P. 160
!33 " ! 4 # & ' ( ) & * + , - Vol.33No.4
2022 $ 8 % JournalofWaterResources&WaterEngineering Aug.,2022
DOI:10.11705/j.issn.1672-643X.2022.04.21
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FGHIJ:TV731.2 KLMNO:A KPQJ:1672643X(2022)04015608
Deformationofpowerhousedam sectionofLDRiverbedHydropowerStation
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SIZheng,WUYanbing,DUANBin,HUXingwei,TANGRongping,ZHANGHuiyuan
(1.SchoolofWaterResourcesandHydropower,Xi’anUniversityofTechnology,Xi’an710048,China;
2.PowerChinaNorthwestEngineeringCorporationLimited,Xi’an710065,China;
3.HuanengLancangRiverHydropowerInc.,Kunming650200,China)
Abstract:AftertheimpoundmentoftheLDHydropowerStation,thedamcrestdeformationofitspower
housedamsectioncontinuedtoincrease,andthemaximumdeformationexceededtheoriginalcalculated
value.Inviewofthissituation ,afiniteelementsoftwareisusedforthesimulationcalculationofthesec
tionfromthreeaspects,namely,externalloadcomponent,temperaturecomponentandagingcomponent.
Thereasonforthecontinuousincreaseofdamcrestdeformationisanalyzedbycomparingthesuperim
poseddeformationwiththemeasureddeformation.Thecalculationresultsshowthattheexternalload
componentaccountedforthelargestproportionofthedamcrestdeformation ,whichwas50% ofthetotal
deformation,followedbytheagingcomponentandtemperaturecomponent,accountingfor27% and23%
ofthetotaldeformationrespectively.Afterthewaterlevelinfrontofthedamreachedthestablestate,the
deformationincrementofthedamcrestwasmainlycausedbyagingandtemperature,ofwhichagingde
formationaccountedfor86% andtemperaturedeformationaccountedfor14%.Withthepassageoftime ,
theconcretecreepgraduallyconverged,thetemperaturefieldgraduallystabilized,andtheagingdeforma
tionandtemperaturedeformationtendedtostabilizeaswell.Therefore,thedamcrestdeformationdidnot
continuetoincrease.Theoriginaldeformationcalculationmethoddidnotconsidertheinfluenceoftem
peratureandaging,resultinginthemonitoringvaluebeinggreaterthantheoriginalcalculatedvalue.Itis
suggestedthattheinfluenceoftemperatureandagingonstructuraldeformationshouldbefullyconsidered
inthedeformationcalculationofsimilarprojects.Theresearchresultscanprovideareferenceforthede
formationreviewandpredictionofthepowerhousedamsectionofriverbedhydropowerstations ,andpro
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