地铁隧道施工外文文献翻译.docx

地铁隧道施工外文文献翻译.docx

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地铁隧道施工外文文献翻译

（含：

英文原文及中文译文）

文献出处：

CocherilY.StudyonConstructionTechnologyofMulti-ArchTunnelGroupinUrbanUndergroundRailway[J].JournalofCommunications,2021,3（4）:

22-32.

英文原文

StudyonConstructionTechnologyofMulti-ArchTunnelGroupinUrbanUndergroundRailway

YCocheril

Abstract

Inthispaper,theconstructionmethodofthemulti-archtunnelgroupisdiscussedbyusinganengineeringexampleofMetroLine3.Intheconstructionofthesubway,theconstructiontechniqueofchangingamulti-archtunnelintoasingle-holetunnelwasfirstproposed.Thetechnicalsolutionsofthesingle-middlewallandtheseparatedmiddle-wallstructurewerecomparedandselectedtomeettherequirementsofstructuralsafety,constructionsafety,andeconomicefficiency.Goodtechnicalsolutionscanprovidereferenceandreferenceforthedesignandconstructionofsimilarprojectsinthefuture.Keywords:

multi-archtunnelgroup,singlemiddlepartitionwall,separatedmiddlepartitionwall,constructiontechnology

Becauseofthedesignrequirementsofthesubwaytunnel,avarietyoftunnelstructuresarerequired.Amongthem,amulti-archtunnelsegmentconsistingofunequalcross-linkedarchesandtriple-archedtunnelsisoftenusedfortheconnectionofthemainlineandthecrossoverline.Thisarticlecombinestheprojectexampleaccordingtothegeologicalconditionsofthetunnel,thetimelimitrequirementsthroughcomparisonandselectionofthebestconstructionprogramthatcanachieverapidconstructionandsaveconstructioncosts.

1ProjectOverview

ThereturnlineofSportsWestRoadStationonMetroLine3isacomplextypeofreturnlinefromSportsWestRoadStation.Inthesection,atunnelgroupwithunequalspanswithdoublearchesandtriplearcheswassetup.Unequalcross-archtunnelexcavationspanof20.1mexcavationheightof10.076mcross-vectorratioof1:

0.5holeliningaftertheliningof5.2mlarge-holeliningafterthespanof11.4minthewallthicknessof1.6m.Thetriple-archtunnelexcavationspanis19.9mandthe7.885mcross-vectorratiois1:

0.1.Thesurroundingrockofthesectionofthemulti-archtunnelisfromtoptobottom:

artificialbackfill,redsandandalluvialsandlayer,alluvial-diluvialearth,fluvial-lacustrinesedimentarysoil,plasticresidualsoil,hardplastic-hardresidue.Soil,weatheredrockformations,strongweatheredrockformations,weatheredlayers,andweatheredlayers.Tunnelsthroughtheformationofmorehomogeneousrockstrength,strongbearingcapacityandstability.Thethicknessofthevaultcoveringthetunnelis15.518m,andthethicknessofthesurroundingrocklayerIVisTheburieddepthofgroundwaterinthesectionofthemulti-archtunnelis,mainlyQuaternaryporewaterandfissurewater.

2doublearchconstructionplan

Duetothecomplexstructureofthemulti-archtunnelsection,thetunnelsectionchangesgreatly.Theconstructionprocessiscomplexandtheconstructionisdifficult.Theconstructionperiodislong.Therefore,itisveryimportanttochooseagoodconstructionschemetocompletetheconstructionofthemulti-archtunnelsectionwithhighqualityandefficiency.Whenselectingaconstructionplan,thefollowingaspectsaremainlyconsidered:

1ConstructionsafetyandconstructionSafety2Constructiondifficulty3Constructioncycle4Economicbenefits.Basedonthesefourprinciples,thefollowingtwoconstructionplanswereselectedforcomparativeselectionthroughtheresearchanddemonstrationoftheconstructionplan.

2.1SingleWallConstructionPlan

Themainconstructionstepsandmeasuresofthisprogramareasfollows:

1Preventtheconstructionofthemiddlewallfromtimelyconstructionafterthecompletionoftheconstructionofthetemporaryconstructionchannel,double-archedandtriple-archedintermediatewallfromthedouble-archedtunnelontherightlinetothereturnlineside..2Aftertheconstructionofthemiddlewallliningiscompleted,theCRDconstructionmethodfortherightlineshallbeusedfortheconstructionofthelarge-spantunnelofthere-entrylineinaccordancewiththeprincipleof“smalfirst,large,andclosed"（3）Whentheconstructionofthetriple-archtunnelonthesideofthere-entrylineiscarriedout,theconstructionofthetriple-archanddouble-archedmiddlewallshallbecarriedoutinaccordancewiththeconstructionmethodofthemiddle-walloftherightline.Afterthecompletionoftheconstructionofthefour-foldlineonthesideofthemiddlewall,theconstructionoftherightlinewillcontinue.Thisconstructionmethodisappliedtothegeneralconstructionmethodsofdomesticdouble-archtunnelsinGuangzhouMetro,NanjingMetroandBeijingSubway,andcansafelyandsmoothlycompletetheconstructionoftunnelgroups.However,thestudyofpreviousengineeringexamplesandconstructiontechniquescanrevealthattheprogramstillhasshortcomingsanddefects.1Thisschemeisappliedfrequentlyinthisproject.Theinitialsupportandthesecondaryliningofthetunnelwithintheshort21.11mmulti-archtunnelwillconvert4times.

2Thewaterprooflayerconstruction,reinforcementengineering,formworkengineering,andconcretepouringinvolvedintheliningofthemiddlewallandsidetunnelsallrequiremultipleconversionsandaconstructionperiodofupto2months.Afterthecompletionofthelining,theinvestmentoftheanti-biassupportofthemiddlewallandthe

equipmentandequipmentwillleadtohigherconstructioncostsandlowereconomicbenefits.

2.2SeparatedWallConstructionPlan

Themainconstructionstepsandmeasuresofthisplanareasfollows:

1Changetheunequalspandouble-archtunnelsintotwosingleholestochangetheseparation-typemid-risewallfirstfromtheright-linesingle-linetunnelconstruction.2Double-archedtunnelswillnotbeusedformiddle-linerliningundersingle-lineconditions.3Theright-sidedlarge-sectiondouble-archtunnelpassesthroughthesidewalloftheCRDmethod.Forthe4foldbackline,theconstructionisperformedinthereverseorderoftherightline.Adoptingthisschemeisactuallyacomparisonbetweenthetwosingle-lineconstructionmethodsandthepreviousone.Thishasthefollowingadvantages:

1Reducethenumberofconstructionprocessesandspeedupthetransitionoftheprocess.2Reducedthedifficultyofconstructionandshortenedtheconstructionperiod.3Reducedconstructioncostsandincreasedeconomicefficiency.4Thechangetoasinglewallinthemiddleofthewallhascompletelysolvedthewaterproofingdefectsofthedouble-archtunnelstructure.5Theconstructionofthemiddletunnelofatriple-archtunnelisequivalenttoalarge-spantunnelwithreservedcorerock,whichisconducivetotheconstructionofsafetydouble-archtunnelsonbothsides.

Fromtherightlinedirectlyintothetriple-archtunnel,itssupportingparametersarebasedontheoriginaldesign,andtheentireringisinstalled.Thewholeringissprayedonthedesignandtheanchorbaratthemiddlewallisreinforced.There-entrysideisthesameastheright-lineconstructionmethod.Itisnecessarytoremovealongitudinalreinforcementbeamatthejunctionofthetunnelgrille.Strictlycontrolthedistancebetweeneachstepoftheexcavationfootagegridis0.6m/.Themiddle-wallexcavationadoptsaweak-weak-weakeningblastingschemetoconditionallyusethestaticblastingschemetominimizethedisturbancetothemiddle-wallrockformationandtheliningtunneltoensureconstructionsafety.Thesecondaryliningisperformedimmediatelyafterthemiddlewallexcavationiscompleted.Afterthecompletionoftheconstructionofthemiddlewall,thegapsinthemiddlewallswillbebackfilledwithjacksupport.Onlyonesideoftheconstructioniscompletedbeforetheothersideofthewallconstruction.Afterthecompletionoftheconstructionofthemiddlewallsonbothsides,thesecondaryliningofthesingle-holetunnelsonbothsidesshallbepromptlyconducted,andthentheexcavationandliningofthemiddlerockmassofthetriple-archtunnelshallbecarriedout.Specialattentionshouldbepaidtothesettlementandconvergencedeformationofthetriple-archtunnelatthemiddleofconstruction.

Changedthecancellationofmid-wallsthatdonotcrossdoublearchesintoseparatedwalls.Thereisnosimilarengineeringdesignandconstructionexperienceindomesticurbansubwayprojects,andthereisnosimilartunnelstructuredesign.Therefore,whetherthestructureissafeandwhethertheconstructionprocessischangedduringtheconstructionprocess.Safetywillbethefocusofthisprogram.UsingANSYSfiniteelementgeneralprogramsoftwaretoperformnumericalsimulationsonunequalcross-archtunnels.Thestrata-structuremodelwasusedtoanalyzethestressanddeformationofthetunnelstructure（Fig.1,Fig.2,Fig.3）.Thehorizontaldirectionoftheforcetakenalongthedirectionofthetunnelislimitedto3timestheholespan.Theverticaldirectionistakenupwardstothesurface,andthebottomis3timestheholespan.ElementmodelElasto-plasticphysicaltunnelliningwithDPstratummaterialadoptselasticityThebeamelementsimulationbeamelementsandsolidelementsareconnectedusingacouplingequation.ItcanbeseenfromthedataanalysisinTable2thatthelargetunnelhasagreaterimpactonthesmalltunnelduringconstruction.Ifthenecessaryreinforcementmeasuresaretakenforthesmallsectiontunnelandthelongitudinaldemolitiondistanceofthetemporarysupportiscontrolled,thisschemeisbeneficialandfeasible.

5KeyConstructionTechnologiesandCorrespondingMeasures

Theconstructionofthemulti-archtunnelsectionneedstobecarriedoutunderstrictconstructionorganizationandstrongtechnicalgu