MSS滑移模架施工工艺及技术控制Word格式.docx
- 文档编号:18992459
- 上传时间:2023-01-02
- 格式:DOCX
- 页数:5
- 大小:19.12KB
MSS滑移模架施工工艺及技术控制Word格式.docx
《MSS滑移模架施工工艺及技术控制Word格式.docx》由会员分享,可在线阅读,更多相关《MSS滑移模架施工工艺及技术控制Word格式.docx(5页珍藏版)》请在冰豆网上搜索。
LiuJizheng,QiLujie,WangXiaoshan
(ShandongProvinceTrafficEngineeringCorporation,NanjingYangtzeRiverBridgeProjectDepartment)
[Abstract]thispaperbrieflyintroducesthestructureandcompositionofMSSslipanditsapplicationinconstruction.
Slidingformwork;
constructiontechnology;
deflectioncontrol
I.GeneralSituationoftheproject
NanjingYangtzeRiverBridgeNorthBridgebridgeupperstructurefor16m*30mand5m*50mPCwithvariablecrosssectioncontinuousbeambridge.Thewholebridgesectioniscomposedoftwosingleboxandsinglechamberbeamsectionsseparatedfromtoptobottom,andacentralpartitioncoverplateisarrangedinthemiddle.among
5*50mapproachbridgein
30mapproachbridgeandthemainbridgetransitionsection,thebridgeislocatedinlandandwater,landahole,fourholesonthewater,thepeakwaterlevel7m.Therefore,itisveryimportanttochooseanoptimumconstructionscheme.
Two,schemecomparison
Basedonthebridgepositionof50mbridge,twoschemesshouldbeadoptedfortheconstructionofsuperstructure:
1.Supportconstruction,setupafullsupportwithoneholeontheriverbank,insertfourholecopperpipepileinwater,andbuildasteelpipepilesupport.Adopttheconstructionwithoutscaffold.Thatis,theintroductionofforeignadvancedequipment-slidingdieframeforconstruction.
Thefirstconstructionplanisthetraditionalconstructionmethodofourcompany.Thereareabundantconstructionexperience,thetechnologyiseasytocontrol,butthisschemeforwaterconstruction,heavyworkload,Jixietaiban,theeconomyisnotreasonable,theconstructionscheduleisnotideal.Secondkindsofconstructionschemes,advancedconstructionequipment,withtheleadingdomesticlevel,butthiskindofequipmentisusedforthefirsttimeourcompany,thetechnologyisdifficulttocontrol,fortheconstructionofwaterinthemiddlespancast-in-placecontinuousbeambridgeisparticularlysuitablefor.Syntheticmanifoldreasons
InconsiderationofNanjingbridgeprojectofthecompanyultimatelydecidedtousenoscaffoldingconstructionthattheintroductionofMSSslidingformworksystem.
Three,slidingmodeprofiles
TheMSSslidebeamintroducedbyourcompanyismainlycomposedofsixparts,thebracket(NiuTui),themainbeam(GangXiangliang),thecrossbeam,thebackbeam,theexternaldieandtheinternaldie.Eachpartisequippedwithaninternalhydraulicormechanicalsystem.Thestructureandfunctionofeachcomponentareasfollows:
1.bracket
Bracketsarecommonlycalledbracketsandtriangularstructures.Throughthereservedhole(diameter:
80cm*100cm)insertattachedtothepieronthepier.Itsroleistosupportthemaingirder,themaingirderloadtransfertothepieronthebracket.Aslidingblockisarrangedonthetopfaceofeachbracket.Itisequippedwithtwopairsof20thorizontalautomaticmovinghydraulicjacks.
A450tverticalautomatichydraulicjack,alongitudinalmovinghydraulicjack.Themainbeamisembeddedintheoverheadtravellingcrane.Inordertoreducethefrictionbetweenthemainbeamandthecrownwhenmovinginlongitudinaldirection,thecraneisequippedwithapolyfourvinylslideboard,andthemainbeamispositionedinthedirectionoftheslab,thedirectionofthebridgeandtheverticalheightthroughthethreehydraulicsystem.
2.mainbeam
Theslidinggirderisapairofsteelboxgirders.Thesectionsizeofthesteelboxgirderiswide:
2.0m,height:
3.0m,length64.8m,dividedintosixsections-10.7m+4*0.8m+10.9m).Thejointsareconnectedbyfrictiontypehighstrengthbolts.Inordertomakethemainbeamslidealongthebridgefromtheupperholetothenexthole,thefrontandbackofthemainbeamisequippedwithabridgetypenosebridge,long21m.Themaingirderisaloadbearingcomponentoftheslidingmode,weighingabout350t.Themainbeamisprovidedwithawindow,andthecrossbeamisprovidedwithamainbeam;
averticalhydraulicjack,amechanicaljackandahorizontaljackarearrangedinthewindow.Thesteelbeamishingedwiththemainbeamthroughthepressuresystem,andthemainbeamissubjectedtotheconstructionloadoftheexternal,internalandupperstructuretransferredbythecrossbeam.
3.beam
Thewholeslidingmodehas18pairsofcrossbeams,thebeamis"
H"
type,thesteelstructuresizeis35cm*90cm*900cm,eachpairofbeamsforpinconnection,thebeamspacing3.6m,thebeamhasnopinhole,inordertoinstalltheexternalmoldsupport.Thecrossbeamcanbeadjustedverticallyandtransverselythroughthepressuresysteminthemainbeam.
4.externaldie
Theoutermoldcomprisesabottomplate,webplate,ribandflangecomponent.Thefloorplateisdirectlylaidbetweenthetwoadjacenttransversebeamsandcorrespondswiththecrossbeam.Theconnectingdirectionofeachpairofbottomplatesalongthedirectionofthecrossbeamisconnectedbycommonbolts.Theoutertemplatejointisintheoutermouldcentralaxis.Totalfloorwidth6.5m.Theweb,ribandflangealsocorrespondswiththebeam,andthroughthetemplatebracketandthesupportingbeamsareprovidedtoinstall.
5.internalmodel
Setalongtheinternalmoldmoldshiftingsystemincludingthetemplate,electriccar,railandbeammodel.Thetransversetransportationandinstallationofelectriccartocompletethe.Theelectriccarisequippedwithahydraulicsystem,throughwhichthehydraulicsystemtocompletetheinstallationofinternaldie.
Four、constructionprincipleandprocessflowofSlipform
TheinstallationandadjustmentofslipandslipmoldMSStemplateis"
hydraulic"
asthedrivingforcetothehydraulicjacktoworkincontrolequipment,hydrauliccontroldevice,thehydraulicjackpush,thuscompletingtheadjustmentinplace,thecrossbeamandtheinnerandoutermouldinstallationandadjustment.Beforeconstruction,firstofall,thepreparationoftheconstructionalongthetechnicalprogram.Thepurchaseofspecialequipment,machineryandequipment,leasinglargeliftingequipment.Slidingmodeconstructionaccordingtothefollowingprocedures:
(NiuTui)bracketassembly,girderassemblingandrelatedconstructiondesigntoolsinplace,liftingbracketgirderhoistingandinstallation,beammainbeaminplace,layingfloor,installationofformworksupport,installationandconstructionoftheouterwebandflangeplate,plate,die.
Five,slipformsitespecificassembly
Thequalityoffieldassemblyofslipformdirectlyaffectsthequality,scheduleandconstructionsafetyofboxgirderconstruction.Therefore,whenassembling,
Accordingtothedesigndrawingsalongthedie,instrictaccordancewiththe"
steelconstructiontechnicalspecifications"
foroperation,forhigh-strengthboltjointsurface,carefulinspection,onebyonesurfacetreatment,soastoachievethepropercoefficientoffriction.Highstrengthboltconnection,taketheinitialandfinalmaterialexpress,repeatedoperation,makeeveryboltmeetthedesignoftorquewrenchtorquevalue,andperiodiccalibration,ensuretheconnectingforcestrength,preventingengineeringaccidents,affectingthequalityofconstructionsafetyandconstruction(with)partsmustberemovedortreatedqualifiedrearcanuse.
Bracketassemblyonsite:
becausethebracketistriangularandhasacertainheight,thesiteassemblyisunstableandshouldbesupportedbyatriangularsupport.Theliftingbracketplacement,pierreservedhole,withthetopbracketbylevelingleveling,sothatthecraneonthesurfacesmoothslip.Inordertopreventthecarriagecapsizedintheforce,eachofthebracketiscomposedofthreadtopull,embeddedpier,sotheinstallationbracketshouldbeontheothersideofunilateraltemporaryplacementofacarryingpole,wearthreadtension,topreventinstability.
Themainbeamisinstalled;
becausethemaingirderisselfimportant,thewholehoistingisdifficult.Duringconstruction,thecraneishoistedattwotimes,andtemporarysupportisarrangedinthespantocarryouttheclosureassembly.Thisrequiresthetemporarysupportoftheelevationofaccuratemeasurementandslope,sothatthesteelbeaminthemiddleofthesmoothdocking,assembly.
Afterthemaingirderisassembled,thecrossbeamisplacedatthemainbeamwindow,andthemainbeamisplacedundertheinfluenceofthehydraulicsystem,andthebridgeispositionedaccuratelyinthedirectionofthehydraulicsystemwhenallthebeamsareinstalled.Atotalstationortheodoliteisinstalledatthecenterofthepier,thebridgeaxisisreleased,thecrossbeamisadjustedaccordingtotheaxisofthebridge,andthebottomplateislaidwithapin,andtheaxisdeviationiscontrolledwithin5mm.Then,theinstallationofthewebandflangeplates.
Whenassemblingtheslipform,thepartsarerequiredtobeconnectedreliably.Afterassembly,theutilitymodelcanbesafelyandreliablychecked,andcanbeusedfortheconstructionoftheupperstructure.
Six、adjustmentoftemplateandelevationcontrol
Inordertobettersetcamber,thissetofslidingformworkisdesignedwithLCMformwork,andthedesignissupportedbysheetiron.Accordingtotheactualconstructionpractice,takingintoaccountthequalityofthecastbeambody,weadoptedtheputtytoa
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- MSS 滑移 施工工艺 技术 控制