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1、西南交通大學碩士學位論文富水砂卵石地層土壓平衡盾構帶壓換刀技術研究姓名：侯磊申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：仇文革20090501西南交通大學碩士研究生學位論文第1
2、頁Abstract111theconstructionofurbanundergroundrailway,shieldconstructionmethod,withitsmanyadvantages，hasbecomethemainmethodofsubwayconstruction．Shieldconstructionexperienceshowsthatcutting·toolweal
3、"ofshieldmachineiseasytobecomesevereW01TI，needingregularmaintenanceandreplacementoperation，SOchoosingeconomicandfeasiblewayforreplacingtoolisimperative．TakingChengdusubwayengineeringbackground，thisarticlestudythefeasibilityandtechnologyofreplacingcutting·toolinpressureofEPBshieldinwater
4、-richandpebblysandstratum．Thecontentsinthispaperenumeratedasfollows：1、ComparativeanalysisofreplacingtoolmodeAccordingtothedifferentwayofreplacingtoolwear,contrastingandanalyzingrelativemeritsoftheseways，thesuitablewayforreplacingtoolofshieldconstructioninwater-richandpebblysandstratumis
5、definited．2、Theprincipleandbasicresearchofreplacingcutting—toolwithpressureAccordingtothemechanismofshieldexcavation，replacingcutting-toolwithpressureisanalyzed．Todirectatthewater-richandpebblysandstratumofChengdu,usingthemethodofseparatingsoilandwater,empiricalformulasofthepressurevalu
6、eofreplacingcutting-toolwithpressureisdrew．3、keytechnologyofreplacingcutting·toolwithpressurekeytechnologyofreplacingcutting-toolwithpressuremainlyincluding：bentoniteproportioningandpreparation、controltechnologyofbuildingandmaintainingpressure、pressurevalueandparametersettingofshieldinr
7、eplacingtools、measureofpressureadjustinginspecialcircumstances，finallytheentiretechnicsprocessofreplacingtoolwithpressureisconcluded．4、Riskmanagementtechniqueofreplacingcutting-toolwithpressureTheapplicationofriskmanagementidea，riskassessmentandcountermeasureisresearchedforprocessofbuil
8、dingpressure，keepingpressure，replacingcutting—toolwithpressureandrecoveringtunnelingtechnology．Intheprocessofreplacing西南交通大學碩士研究生學位論文第1lI頁cutting—toolwithpressure，thereexistssecurityriskandriskofhealth．Manysuccessfulexperienceofreplacingcutting—toolwithpressureshowsthat，replaci
