Page 127 - 《水资源与水工程学报》2023年第3期
P. 127

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.15


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                 ABCDE:TV68   FGHIJ:A    FKLE:1672643X(2023)03012306

               Schemecomparisonandnumericalsimulationofhydrauliccharacteristicsof
                       underlyinglowpressurelongdistancewaterconveyancetunnel

                                                              2
                                                                                         1
                                                                            1
                                               1
                               ZHANGWenjiao,HUNengming,WUCaiping,ZHAOXing
                   (1.KeyLaboratoryofLowerYellowRiverChannelandEstuaryRegulation,MinistryofWaterResources,YellowRiver
                   InstituteofHydraulicResearch ,YellowRiverConservancyCommissionoftheMinistryofWaterResources,Zhengzhou
                          450003,China;2.YellowRiverEngineeringConsultingCo.,Ltd.,Zhengzhou450003,China)
                 Abstract:Intheprocessoflongdistancewaterconveyancetunnelconstruction,theunfavorablefactors
                 affectingtheprojectsafetyoftenoccur,suchasdefectivestrata.Theunderlyinglowpressurelayoutmeth
                 odisanexcellentapproachaddressingsuchproblems.Takingalongdistanceunderlyinglowpressure
                 waterconveyanceprojectastheresearchobject ,afewsections,suchastheboxculvert,waterdiversion
                 outlet,inletandoutletshaftoftheunderlyinglowpressuretunnel,underlyinglowpressuretunnelsection
                 andsomeopenflowtunnelsectionswereselectedfortheestablishmentofathreedimensionalnumerical
                 model.TheRNGk- ε twoequationturbulencemodelcombinedwiththeVOFmethodwasusedtocarry
                 outthenumericalsimulation,andthedistributionandchangelawofhydrauliccharacteristicsalongthe
                 underlyinglowpressurelongdistancewaterconveyancetunnelwerestudiedforthecomparisonandselec
                 tionofdifferenttunnelschemes.Accordingtotheresearch ,underdifferentworkingconditions,theflow
                 connectionofeachpartoftheunderlyinglowpressuretunnelwasrelativelysmooth,andthephenomenon
                 ofalternatingopenandfullflowdidnotoccur.Thevelocitydistributionintheinletandoutletshaftofthe
                 underlyinglowpressuretunnelwasrathercomplicated.Withtheincreaseofthediameteroftheinlet
                 shaft,thedistributionofwater,gasandwatersurfacelineinthetunneldidnotchangemuch,theveloci

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