内昆铁路K249159右侧岩质边坡崩塌形成机理及整治措施

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1、西南交通大学硕士学位论文内昆铁路K249+159右侧岩质边坡崩塌形成机理及整治措施姓名：陈秀琼申请学位级别：硕士专业：地质工程指导教师：白志勇20070501西南交通大学硕士研究生学位论文第2页5)采用FLAC3D软件模拟分析了崩塌体的应力应变场，模拟结果与野外实际情况基本一致。61验证了在内昆线K249+159点铁路上方的312国道的边坡崩塌治理方案中，布鲁克网防护的可行性。n指出了工点既有铁路的半堤半堑路基形式不能抵抗崩塌体的冲击，需将路堑改为明洞和棚洞。同时提高其抗冲击能力设计。关键词：地质灾害，崩塌，

2、数值模拟，工程防治西南交通大学硕士研究生学位论文第3页AbstractMountainousareaoccupy2／3ofthetotalareainChina,whichmakesisamontaniccountry,especiallyinthesouthwestmountainousalgaoccupy70％．Inthesearea,plentyofgeologicalhazardsrestrictthemontaneeconomicaldevelopmentandimimidatethesecurit

3、yofthecommunityinSouthwest．Withthedevelopmentofthewestexploitation,moretransportationcriesfortheevaluationandrenovationalongthearteries．ThisarticleconcentrateontherockfallalongtheK249+159sectionoftherailwayfromNcijiangt0Kunming,andbyanalyzingthegeologicalen

4、gineeringconditionandhazardousgenesicfactorsonthebamcofoutdoorinvestigationandformerdata,formativesystemsanalysisoftherockfallisimplemented，andthenumericalcalculationandsimulationisutilizedtoanalyzethestabilityandstrainstressfield．Atlast，renovationmethodisb

5、roughtforwardonthebasisofeognitiousabove．ThisarticlenlRkesthefollowingconclusionthroughthesystemsanalysisoftherockfallalongtheK249+159sectionoftherailwayfromNeijiangtoKunming：1、Thedestroymodeofrockfallisoffsetaccordingtofieldinvestigationandgeotechnicaltest

6、sinlaboratory．2)Restoretheoriginalshapeofmeslope，andprovedtheslopeisnotstablebycalculating．3)Gotthefinalspeedoffalling·rockis30．53m／s，anditsbouncedistancein西南交通大学硕士研究生学位论文第4页4)Analysisontheharmtotheroadandrailwayandaffectrange．andthemaximumimpactforcetOther

7、ailwayopentunnels．5)SimulatedandanalyzedthestressandstrainfieldsofrockfallsbyFLAC3D．Thesimulationisidenticaltothereality．6)VerifiedthefeasibilityofBruckerprotectivenetonrockfalltreatmentofRoute312abovek249+159，Nei·Kunrailway．7)Thecuttingrailwayandtheintensi

8、tycannotresisttheimpactofrockfalls,thecutslopeneedtochangetOopentunnelandshedtunneltoimproveitsimpact-resistance．Keywords：geologicalhazard,rockfall，numericalsimulation，engineeringrenovation西南交通大学硕士研究生学