金沙江其宗水电站引水洞出口边坡稳定性研究-岩土工程专业论文.docx

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金沙江其宗水电站引水洞出口边坡稳定性研究-岩土工程专业论文.docx

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金沙江其宗水电站引水洞出口边坡稳定性研究-岩土工程专业论文

关键词：岩体结构边坡稳定性数值模拟边坡-洞室体系组合SlopestabilityofdiversiontunneloutletofQizongHydropowerStationinJinshaRiverIntroductionoftheauthor:LuJinxin,female,borninSeptemberof1980,studiedinChengduUniversityofTechnologysinceSep.2007,majoredinGeotechnicalEngineering,andgotthemasterdegreeatJune,2010,learningafterprofessorHuangRun-qiuandassociateprofessorJuNengpan.AbstractTheStationislocatedthemiddlereachesofJinshaRiverwhichisseatedatthejunctionofDiqingPrefectureandLijiangCityofYunnanProvince.MainlyrockmassinthesystemofDevonianphyllite,slateandphyllitefoldercrystallinelimestone.Tomeettherequirementsofhydrauliclayout,excavationofdiversiontunnelexitheightof300m,sloperatioof1:0.75,whilethelowerpartofslopeexcavationofsevenneededdiversiontunnel,Sohighandsteepslopestabilityphyllitewhat?Excavationofdiversiontunnelontheslopestabilityistheirimpact?Engineeringdesignsectorasthekeytechnicalissuesofconcern.Papersolvetheseproblems,theinvestigationofdiversiontunnelatthesceneofrockmassslopeoftheoutletstructurecharacteristics,andindoorrockonanexperimentalbasis,onthePhylliteBodyofthemicrostructure,physicalandmechanicalpropertieswerestudied.Combinationofstructuralcharacteristicsofrockslopeanalysisoftheslopedeformationandfailuremodespossible,bynumericalsimulationoftheexcavationslopestabilityandthetunnelexcavationontheslopestabilityanalysis.Thekeycontentsandconclusionsareasfollows:ThefieldgeologicalsurveyshowsthatrockstructureoftheoverallslopearegenerallybelongstothemosaicstructurewhichstructuralplanesaremainlyⅣandⅤlevel.TheⅣlevelstructuralplanesaremainlyincludingtoNEsteepanglestructuralplansandtoNWmediumanglestructuralplans,andⅤlevelstructuralplanesareoriginalstructuralplanswhicharequartzfoliationdeveloppedinphylliteandfoliationplanedeveloppedinsericite.Theresultsofthinsectionshowsthatmineralsinphyllitearemainlycontainedquartz,chlorite-sericiteandcarbonate.Toacertainextent,themicro-structuralcharacteristicsofphylliteappearsmicro-fracturephenomenononmicrosoftrocks.Andlaboratorytestshowsthatphylliteissignifi