下穿滑坡公路隧道施工预案研究

《下穿滑坡公路隧道施工预案研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学硕士学位论文下穿滑坡公路隧道施工预案研究姓名：韩飞申请学位级别：硕士专业：桥梁与隧道工程指导教师：张志强20070601西南交通大学硕士研究生学位论文第1f页AbstractChinaisamountainouscountry．Correspondingtothis，thedisastersoflandslidehappencontinually．Especially，withlandbeinghighlyutilizedthisyears，it’simpossibletoavoidlandslid

2、efieldtotallywhenconstructingfreeways。Sometimes，becauseofcertainreasons，thetunnelwiIIgothroughorevengoacrossthelandslide．Howeverinnowerdays，thereisalackofcorrelativeresearchesonconstructingtunnelacrossthelandslide．Andtheexperienceofconstructionwhichcanbeused

3、forreferenceisalso1imited．So，thisthesisisabouttobecombinedwiththeSuanShuiWanroadtunnelandShanShenMiaoroadtunnel，andwillmakeastudyontheconstructionprogramofroadtunnelgoingthroughlandslide．ByusingtheFEMprocedureofANSYS，constructionsimulationofSuanShuiWanroadtu

4、nnelandLandslidesimulationisconducted．Thenthisthesisdrawstheconclusioninprocessoftunnelconstructiononthefollowingfactors：thevariationalruleofprimarily1ining、thecharacteristicruleofhorizontaldisplacementandstressoflandslide、changingregulationofrimdisplacement

5、．Andthisthesisanalyzesthemutualvariationalrulebetweenthelandslideandtunnel，andalsoanalyzesthereasonableconstructionmethod．Thisthesisalsocalculatethelandslidesafetyfactorbyusingtheshearstrengthreductionmethod(SRM)withFEM．Withthea-tanjreduction，theFEMmodelofla

6、ndslidereachesinstability，andthevalueofthenodaldisplacementjustafterslopefailurehasabigjumpcomparedwiththatbeforefailure．Thisactuallymeansthatnostressdistributioncanbeachievedtosatisfyboththeyieldcriterionandglobalequilibrium．Slopefailureandnumericalnon—conv

7、ergencetakeplaceatthesametime．Sonon—convergenceinfiniteelementprogramcanbetakenasasuitableevaluationcriterionofslopefailure．Thesafetyfactoristhenobtainedbyc-tanjreductionalgorithm．KeyWords：landslide；roadtunnel：39FEM；safetyfactor：shearstrengthreductionmethod(

8、SRM)withFEbl西南交通大学硕士研究生学位论文第1页第1章绪论1．1本文研究背景及意义我国幅员辽阔，地质条件复杂，地质灾害种类众多，分布广泛。滑坡是各种地质灾害中对山区公路危害最大、分布最为普遍的一种灾害。随着国民经济及各项建设事业的蓬勃发展，我国的滑坡事故愈来愈多，滑坡灾害常使交通中断，影响公路的正常使用，对国民经济和人民财产造成相当大的损失，给各项建设事业带来严重的影响，因