大跨度隧道施工监测与数值分析

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1、万方数据3．NumericalanalysisofdynamicconstructioninVAsectionsoftheDapingstationtunnelpointedoutthatthecoreofsoilexcavationmakethemaximumprincipalstressofrockofarchfeetandarchwaistlargerduringthetunnelconstructionprocess，whilethevaultrock，asthecoreofsoilexcavationledtostressrelease，occursunloading

2、area．4．NumericalanalysisofdynamicconstructioninVBcross．sectionoftheDapingstationtunnelpointedoutthatbendingmomentofthecross—sectionbearingbeamoftheDapingstationisconcentratedinthetopsiteoftheoperatingline，bendingmomentofotherpartsaresmaller．ThedistributionofaxialforceofHand-dugpilethatClosin

3、gtotheoperatinglinealargerpileaxialforce，andbeingawayfromtheoperatinglineasmallerpileaxialforce．Whencross．sectionrockexcavation，themainstructureofthestationtakespileandpilecapmethodacrosstherangeofthetunnel．Aftertakingthismethodofconstruction，thestreSSanddisplacementofliningofoperatinglinear

4、esmall．Sothismethodcanobtaingoodresults．5．BycomparingofnumericalanalysisandmonitoringresultsofDapingstationVgraderocktunnel，theanalysisshowsthatboththedisplacementandstressresultshavecertaindifferences，butbotharebasicallyconsistenttrend．Therefore，analysisshouldbecoupledthetwotogetherinordert

5、oachievethepurposesthatshouldbeaScientificandtruereflectionofthesurroundingrocksupportdeformationandstresscharacteristics．Keywords：rockmechanics；large—spantunnel；dynamicconstructionmechanics；on-sitemonitoring；numericalanalysis万方数据湖南科技大学硕士学位论文目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．

6、．iAbstract．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．⋯⋯．．．．．．．⋯．．．⋯⋯⋯⋯．．．．．．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．⋯⋯⋯．．⋯．．．．．．⋯．⋯ii第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1研究背景及意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2开挖方法研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．1大跨度隧道开挖方法及研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．2大跨隧道穿越段开挖方法研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．3数值模拟研究现状⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．3．1大跨隧道动态施工数值研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．41．3．2大跨隧道穿越段动态施工数值研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．51．4大跨隧道施工监控量测研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．51．5主要研究内容与技术路线⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．61．5．1主要研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．61．5．2技术路线⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯