大相岭高速公路隧道岩爆预测研究

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1、西南交通大学硕士学位论文大相岭高速公路隧道岩爆预测研究姓名：陈景瑜申请学位级别：硕士专业：地质工程指导教师：白志勇20090301西南交通大学硕士研究生学位论文第lI页AbstractTheDaxiangLingTunnelwhichisconstructing，isthecontrolledmajorprojectofhighwayfromYa’allCitytoLuguCounty．Becauseofthecomparativelycomplexgeologicalconditionwhichthetunnelislainin,andist

2、heexistenceofstressregionofuplandtherockbuntmaybeoneofthemainengineeringgeologicalproblemofthistunnel．ThisthesiscombinescloselywiththeengineeringpracticeofDaxiangLingTunnel，choosesthestudyofrockbuntproblemasthemainlineandmakemorecomprehensivecasestudyfortheundergroundenginee

3、ringroadblock．StudycontentsandconclusionsacquiredinthisthesisaremainlyincludedaSfollows：(1)Theengineeringgeologicalenvironmentalconditionsofstudyareaexplicated．Studytheregionalgeologyandtheregionalstability，landformconditions，stratalithologyandtheengineeringgeologicalpetrofa

4、bric，geologicalstructureanditsstressfieldevolution，thehydrologicalconditionsandsuchinthestudyarea．(2)Thespecialstressstatusofrockmassintheprojectareaareascertained，andthesystematicrecognitionofdevelopmentaldistributionrulesofgroundstressinthewholerockmassoftunnellingworksare

5、obtainedthroughfieldandindoortesting．ResearchofthisthesishasshownthemeandirectionofmaximumprincipalhorizontalstressisN550wandthepreferredorientationofprincipalhorizontalpressureisN63。W．(3)Thelinearrelationislyinginhorizontalpressureandgeostaticstresswiththeincreaseofburiedde

6、pthoftunnelaccordingtoanalyzingandcalculatingthedrillingdata；andthecorrespondingequationoflinearregressionisbuiltinordertocalculatetheprimarystressfieldofthetunnel．(4)Themaximumtangentialstressvaluesoftunnelwallisacquiredthroughnumericalcalculationand3D—sigmafiniteelementana

7、lysisoftunnelexcavation．(5)Theprobability，sectionandintensityofrockburstemergingpossiblyduringtheDaxiangLingTunnelexcavationthroughapplyingthetwomethodssuchaspredictionmethodofstress-strengthratioandfuzzycomprehensiveevaluationonthebasisoftheforegoingresearch．Keywords：Daxian

8、gLing；highwaytunnel；rockburst；prediction西南交通大学学位论文版权使用授权书本学位论文作者完全了解学校有关保留、