鐵路運(yùn)營隧道襯砌狀態(tài)評(píng)估體系的建立及工程應(yīng)用研究.pdf

1、北京交通大學(xué)博士學(xué)位論文鐵路運(yùn)營隧道襯砌狀態(tài)評(píng)估體系的建立及工程應(yīng)用研究姓名：吳江濱申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：巖土工程指導(dǎo)教師：王夢恕張頂立20040501AbstractBasedonvastliteraturesandextensiveexperiences，theinfluencesoftunnelliningthicknessdeficiencyandcontiguityconditionchangebetweenliningan

2、dsurroundingrockmassontheliningsliessstatearedeeplystudiedinthenseofmanyresearchmeanssuchasinsitumeasureddatum，analyticsolutionandnumericalarialysisSoasetofappraisalmethodabouttunnelliningsmteiscarriedout，Someapplyingpmc

3、ficestestifyrationalityofthatmethodandalsoindicateitsopemtionalfeasibilityThroughoutthewholedissertation，themaremainlyconclnsionsasfollows：(1)Combined州t11insitumeasureddatumofover100operationrailwayaumels，therulesoflinin

4、gthickness，theconfiguityconditionbetweenliningandsurroundingrockirlassandthemdialdimensionofholesarealsogainedaftertheanalysisofabovementionedinformation(2)Accordingtotheaxisproportiontheoryandtheconceptofharmonyhole，the

5、ultimatestableshapeoftheholebetweenliningandsurroundingrockmassiseUiplseinthetrdBsversesectionThentheringdimensionoftheholecanbedeterminedbygeometryrelatiomhipandmechanicalstabilityifthesituationandtheradialdimensionofth

6、eholea∞botllknown(3)Bytheuseofcon_formalmappingandtheapplicationofcomplexfunctionmethodinthefieldofelasticmechanicsthesecondSU℃SSfieldofrockisdetermined耽ethirdstressfieldofrockandthestressfieldofthetunnelliningcanalsobed

7、eterminedinthecaseofexplicitboundarycondition(4)Takingintoaccountthespatialeffectortheexcavationfaceeffectduringthetunnelconstruction，thedeformationcompatibilityequationcallbededucedThustherelationamongthesecondstressfie

8、ld，thethirdSII∞SSfieldandtheliningstressfieldisestablishedAtthesametime，therulesofstressreleaseratioarediscussedinthesituationsofdifferentrockclassificationdifferentconsURlctionmethoddifferentlateralcoe丘icientdifferent[r

9、ansversesectionfactordifferentburieddepthanddifferentsectionpositionAccordingtotheprincipleofputtingmoreemphasisondominatingfactorsandlessemphasisonsubordinatefactors，stressreleasemtioisdeterminedThus，thestressstateoftun

10、nelliningisalsodeterminedfinally(5)TherearemainlytwofactorswhichperhapsresultinthesplitoftunnelliningOneisflexandtensionactionwhichbringsextremetensionstress，theotherisshearactionwhichbringsex扛e雌shearstressBasedonthosete

11、nsionstressconcentrationfactorandshearstressconcentrationfactorarcthoughtappropriatetojudgetherealstateofopcrationtunnels(6)Tensionstressconcentrationfactorandshearstressconcentrationfactorarebomcalclllatedwiththechangeo

12、fdifferenttunnelliningthicknessanddifferentcontiguityconditionbetweenliningandsurroundingrockmassConsequentlytherelationshipisexplicitbetweenthosesuperficialphenomenaandintrinsicstressstateoftmmelliningThusthebasisoftunn

13、elliningstateappraisalsystemissetup(7)Onthefoundationofpastpracticalexpfrienees，thetunnelliningstateappraisalsystemisfinallyestablishedwhileitisconsistentwithexistingcriterionsandregulationsThisindicatesatransitionfromtr

14、aditionalqualitativeanalysisandexp碰enceanalogtoadvancedquantitativeanalysisThusthetunnelliningstatecmnowbescientificallyandlogicallyrealized(8)The雄Ip糟isalsys船mwhichisestablishedaboveistestifiedcorrectandoperationallyfeas

15、iblebytwopracticalapplications，oneisChaoqiankengtunnel，theotllerisFoziaotunnelKeyWords：railwayopel血ontunnelsstressstatetunnelliningthicknesscontiguityconditionbetweenljningandsunoondingnxkm8deformationcompatibilityequati