高地应力条件下软岩隧道掌子面挤出效应分析

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1、西南交通大学硕士研究生学位论文第1I页隧道掌子面的挤出位移值，得出可以有效控制掌子面挤出的施工工法，为挤出性围岩隧道的施工提供依据。关键词：新意法；掌子面挤出；超前核心土；软岩大变形；数值模拟西南交通大学硕士研究生学位论文第1

2、I页ABSTRACTWiththeeconomicdevelopment,populationgrowthandthedevelopmentofcityscale，humansurvivalenvironmentcontinuestochange，resourcescarcity，percapita

3、livingspacereduce，trafficcongestion,EcologicalimbalanceandSOon．Thoseproblemshavebadinfluenceonthedevelopmentofworldeconomy．Therefore，governmentsaroundtheworldinordertopromotethedevelopmentofeconomyandtosolvetheproblemsoftheurbancongestion，theygraduallybegantofocus

4、onthedevelopmentofcityundergroundconstruction，planetoconstructalargenumberofundergroundengineering．SinecthenewChinawasfounded，theconstructionoftunnelinOurcountryhasmadeoutstandingachievements，attractedtheattentionoftheworld．NewItalianmethodisfoundbythefamousItalia

5、nscholarMrPietroLunardi，alsoknownasthedeformationofrockandsoilcontrolanalysis．Themethodresponsethereasonoftunneldeformation，Putforwardasetoftheoreticalanalysisandpracticalengineeringmeasures．Especiallyundertheconditionofsoftandfractured，byadoptingtheconstraintsand

6、constraintmeasuresandconstraints-leadcoresoiltunnelsurroundingrock，torealizethewholesectionexcavationconstruction，hastheadvantagesofsafety，hi曲efficiencyandcontroltimelimitforaprojectandcost．Inthisthesis，asecondlineoflanxinHigh-speedrailastheengineeringbackground，t

7、hesoftrocktunnelconstructionunderhighgroundstressconditionexisttunnelfaceextrusionproblems，thesciencemainlycompletedthefollowingseveralaspectsstudy：1．Asoneofthemainformsoflargesoftrockdeformation，tostudythemechanismoftunnelfaceextrusionfirstmakethemechanismofsoftr

8、ocklargedeformationclear，thisthesisfromthedefinitionofsoftrock，thecharacteristicsofsoftrocklargedeformationandthemechanismofsoftrocklargedeformationasthethreerespectsofthemechanismofextrusion；Atthesametime，inordertotimelyandeffectivepredictRockstabilityinconstruct

9、ionprocess，thisthesispresentsasimpleandeasypredictionmethodtopredicttunnelfaceextrusion．2．Inthesecondchapterofthisthesisputsforwardthetechnologytocontro