向莆线戴云山隧道凝灰岩耐磨性相关性-研究

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1、西南交通大学硕士研究生学位论文第1I页AbstractIntheprocessoftunnelconstructionbyTBM，thehobwhichcontactsthetunnelfacedirectlyisthemainweal"part，SOitisnecessarytostudythecorrelationofrockwearresistance．Throughrockexperiment，analyzetherelationshipbetweenindexofwearresistanceandot

2、herindex，andcombinethetheorytoexplaintheircorrelation．Firstly,analyzethemechanismofhobbreakingrockandrockabrasion．Analysisillustratethathobinthecutterheadworksasthreedimensionalmovementwhichforwardalongthecentralaxisofcutterhead，spinalongthecentralaxisofcutt

3、erheardandrotation．Itsqueezesandrollsrockbasedonthepropulsionandrollingforcefrompowersystem，propulsionshouldbemorethanrockcompressivestrength，rollingforceshouldbemorethanrocktensilestrengthorshearstrength．Theinteractionbetweenrockandhob．hobwearswithadhesivew

4、ear,abrasivewearandsurfacefatigue．Then，experimentresearchonthe18groupsoftuffrocksamples，includingabrasiontest，basicphysicalpropertiestest，mechanicalpropertiestestandrockidentification．Thebasicphysicalpropertiestestinvolvesdrydensity,waterabsorption，andacoust

5、icvelocity；mechanicalpropertiestestinvolvesuniaxialcompressionstrengthanddeformation，uniaxialtensilestrength，andtriaxialcompression；rockidentificationinvolvesrockhandspecimensobservation，rockthinsectionidentification．Finally,fitthecorrelationbetweenindexofwe

6、arresistanceandotherexperimentindexbytheOriginsoftware，selectthehighestdeterminationcoefficientastheoptimalfittingstandard，andanalyzethecorrelationbasedontheory．Researchillustratesthatthewearresistanceoftuffhassignificantcorrelationwithdrydensity,acousticvel

7、ocity,elasticmodulus，passionratio，uniaxialcompressionstrength，uniaxialtensilestrengthandtheC，妒undertriaxialpeakstrength；thewearresistanceoftuffhaslowcorrelationwithunconfinedresidualstrength，itscorrelationneedfurtherresearch；themineralcomponentoftuffhasasign

8、ificantinfluenceonitswearresistance，especiallyinquantity,particlesizeandarrangementofmineralcomponent；thestructureoftuffmineralcomponentalsoasignificantinfluenceonitswearresistance，vitrictuff'si