浅埋大断面隧道塌方机理与处治技术的分析

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1、万方数据ABSTRACTInrecentyears，urbanconstructionhasarapiddevelopmentinourcountry,whichcreatedmanynegativeurbanproblemssuchastrafficjams，crowdedpopulation，andSOon．Alltheseproblemsaredifficulttosolve．Inordertosatisfypeople’Slivingtrip，itisurgenttodevelopurbansubway．Withtheriseofcitiesmetroproject，theemerg

2、enceofshallowburiedlargesectionttmnelsispromoted，accordingly,greatattentionisattachedonlandslidedisasters．Itisofgreatsignificancetocarryoutaresearchintotheshallowburiedlargesectiontunnellandslidemechanismandtreatmentmeasures，especiallyforurbansubway．ThispaperiscombinedwiththeChongqingrailtransitlin

3、e6acave-inBeibeistood．Thecausesoflandslidesareanalyzedcomprehensively．Theinfluencingfactorsofcausingshallowburiedlargesectiontunnelslandslides，landslideform，failuremechanismandtreatmentmethodandSOonarecarriedonthethoroughanalysis，specificworkisasfollows：(1)Combinedwithengineeringexamples，themaininf

4、luencingfactorsofBeibeistationtunnellandslidesaresummarizedcomprehensively,andthedamageeffectscausedbythesefactorsareanalyzed．Landslideshierarchymodelofaffectingfactorsisestablished．Fuzzyanalytichierarchyprocess(Fahp)isusedtoanalyzetheinfluencinggradationofthemainfactorscausingtunnellandslide．Treat

5、mentschemeisputforward，andanalysiscomparisoniscarriedon．(2)TheriskofBeibeistationtunnellandslideisanalyzed．TheinstabilityprobabilityofCrosssectionofsurroundingrockisestimated．BasedonthenewAustriantheoryanalysis，combinedtherelationshipamongsurroundingrockstress，anchorandthespraylayerinsprayanchorbra

6、cing，thebasicjudgementoftunnelsurroundingrockstabilityisputforward．(3)Basedonthepressurearchtheory，theexpressionofstressofsurroundingrockinabitisdeduced．TheformationmechanismoflandslidescausedbyshallowburiedlargesectiontunnelexcavationiSrevealed．111万方数据(4)Thetunnelstructureunderdifferentconditionso

7、fthestateispointedoutbasedonthelimitanalysistheory．Withthecombinationofupperandlowerlimittheorem，thelimitanalysisofsurroundingrocksupportiscarriedout，andlandslidetreatmentrange，supportingmethodandtheresista