富水砂卵石地层土压平衡盾构带压换刀技术研究

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1、西南交通大学硕士学位论文富水砂卵石地层土压平衡盾构带压换刀技术研究姓名：侯磊申请学位级别：硕士专业：桥梁与隧道工程指导教师：仇文革20090501西南交通大学硕士研究生学位论文第1

2、页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西南交通大学硕士研究生学位论文第1lI页cutting—toolwithpressure，thereexistssecurityriskandriskofhealth．Manysuccessfulexperienceofreplacingcutting—toolwithpressureshowsthat，replaci