Page 88 - 《水资源与水工程学报》2025年第2期
P. 88

!36 "!2 #                         & ' ( ) & * + , -                               Vol.36No.2
               2025 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2025

            DOI:10.11705/j.issn.1672-643X.2025.02.10


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                 FGHIJ:U442.32   KLMNO:A    KPQJ:1672643X(2025)02008409
                             Investigationonlocalscourofaseacrossingbridge

                               foundationunderstrongtidalwavesandtorrents

                                                     1,2,3,4,5
                                           LIYouwei       ,XIAOYizhou   1,2,3,4,5
             (1.CCCCSecondHarbourEngineeringCompanyLtd.,Wuhan430040,China;2.CCCCSHECFourthEngineeringCompanyLtd.,
               Wuhan241000,China;3.ResearchandDevelopmentCenterofTransportIndustryofIntelligentManufacturingTechnologiesof
                 TransportInfrastructure,Wuhan430040,China;4.KeyLaboratoryofLargeSpanBridgeConstructionTechnology,Wuhan
                  430040,China;5.CCCCHighwayBridgesNationalEngineeringResearchCentreCo.,Ltd.,Wuhan430040,China)

                 Abstract:Thecausesoffoundationscourofseacrossingbridgesarecomplicated.Topreventwaterdam
                 age ,itiscriticaltoinvestigatethelocalscoursituationthesebridgesfaceatdifferentconstructionstages.
                 TakingthemainpilefoundationofHangzhouBayRailwayBridge(underconstruction)asthecasestudy,
                 weinvestigatedthescourfeaturesandhydrauliccharacteristicsofthebridgeduringdifferentfoundation
                 constructionstagesbyphysicalmodeltest,numericalsimulationandinsitumeasurements.Theresults
                 showthatthemodeltestandnumericalsimulationresultsareconsistentwiththemeasureddata.During
                 thepilefoundationconstructionstage ,thetidalwavesandtorrentshavescouredthesandylayeroff,left
                 thebridgesitesurfacewithamuddyclaylayer,whichismoredifficulttobesouredoff.70% ofthescour
                 depthoccursinthefirst30% ofthescourduration.Thecofferdamcanreducetherelativevariationrange
                 ofshearstressonthebedsurfaceandthesurroundingflowvelocity,resultingintheformationofasilting
                 areaonboththestossandleeside.Afterthecofferdamislowered ,thescourdepthwillcontinuetogrow
                 another4m,whichcanfurtherincreasethescourdepthandscopebyabout30%,exceedingthede
                 signedscourdepthofpilefoundation.Therefore,countermeasuresshouldbeconsideredforscourpreven

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