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:1672643X(2023)03012306
Schemecomparisonandnumericalsimulationofhydrauliccharacteristicsof
underlyinglowpressurelongdistancewaterconveyancetunnel
2
1
1
1
ZHANGWenjiao,HUNengming,WUCaiping,ZHAOXing
(1.KeyLaboratoryofLowerYellowRiverChannelandEstuaryRegulation,MinistryofWaterResources,YellowRiver
InstituteofHydraulicResearch ,YellowRiverConservancyCommissionoftheMinistryofWaterResources,Zhengzhou
450003,China;2.YellowRiverEngineeringConsultingCo.,Ltd.,Zhengzhou450003,China)
Abstract:Intheprocessoflongdistancewaterconveyancetunnelconstruction,theunfavorablefactors
affectingtheprojectsafetyoftenoccur,suchasdefectivestrata.Theunderlyinglowpressurelayoutmeth
odisanexcellentapproachaddressingsuchproblems.Takingalongdistanceunderlyinglowpressure
waterconveyanceprojectastheresearchobject ,afewsections,suchastheboxculvert,waterdiversion
outlet,inletandoutletshaftoftheunderlyinglowpressuretunnel,underlyinglowpressuretunnelsection
andsomeopenflowtunnelsectionswereselectedfortheestablishmentofathreedimensionalnumerical
model.TheRNGk- ε twoequationturbulencemodelcombinedwiththeVOFmethodwasusedtocarry
outthenumericalsimulation,andthedistributionandchangelawofhydrauliccharacteristicsalongthe
underlyinglowpressurelongdistancewaterconveyancetunnelwerestudiedforthecomparisonandselec
tionofdifferenttunnelschemes.Accordingtotheresearch ,underdifferentworkingconditions,theflow
connectionofeachpartoftheunderlyinglowpressuretunnelwasrelativelysmooth,andthephenomenon
ofalternatingopenandfullflowdidnotoccur.Thevelocitydistributionintheinletandoutletshaftofthe
underlyinglowpressuretunnelwasrathercomplicated.Withtheincreaseofthediameteroftheinlet
shaft,thedistributionofwater,gasandwatersurfacelineinthetunneldidnotchangemuch,theveloci
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