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1、深埋隧洞圍巖穩(wěn)定性研究密級：公開TheStudyOilAdjoiningRockStabilityofDeep—lyingTunnel(申請石家莊鐵道學(xué)院授予工學(xué)碩士學(xué)位淪文)培養(yǎng)單位：專業(yè)：研究生：指導(dǎo)教師：土木工程分院橋梁與隧道工程張小明趙玉成教授二00六年十二月AbstractWiththedevelopmentofthescienceandtechnology,communicationsandtransportation，waterconservancy,cityundergroundtrafficandutilizati
2、onofundergroundspace，etc，peopleputforwardahigherrequestforthequalityoftunnelcngineering．Inthelatestdecades，tomeettheneedofthequickeconomicandsocialdevelopment，agreatmanytunnelsusedinavarietyofformshavebeenbuiltintheworld．Thetunnelisgettinglongeranddeeper．Intheprocessof
3、construction,somespecialgeologicalhazardswillbemetbecauseofthegreatdepthandlongdistance，suchashJighexternalwaterpressure，watergushing，hi曲geo—stress，rockburst，higIlgeo·temperatureandnocuousgasandSOon．Thesegeologicalhazardsbecomethemainrestrictingfactorsoftunnelconstruct
4、ion．ThetwocommunicationtunnelsofJinpingCascade2HydroelectricPowerStationis17．5kmlongand2525mdeepinmaximalbury-depth．Intheconstructionregionthemaximumofprincipalgeo—stressreached54Mpa．Theregionbelongsinhighgeo—stressarea．Excavationoftunnelwillleadtolocalgeotectonicstres
5、sreleaseandstressredistributionaroundthetunnel．Basedonthemoderndesigntheoryoftunnelsconstructionthattheadjoiningrockisregardedasprimaryload-bearingstructure，thisthesishasmaderesearchesonthestabilityoftunnelmotherrockunderthehJighgeo—stress．Firstly,thepapermakesaglobala
6、nalysisofthestabilityoftunnelfromthecharacteristicoftherockinengineeringarea．Secondly,itdisclosestheprincipleofthefailureoftherockmassfromthemechanicalcharacteristicintheprocedureoftheexcavationofthetunnel．Thenbasedonthestudyofthehighgeo—stressandthecharacteristicofthe
7、rockinengineeringarea，thepaperestablishestheelastic-plasticFEMnumericalsimulationmodel，andthengetstherelationsbetweenthedifferenttunnelsdiameter,differentlateralpressurecoefficientandthestressdistributionandplasticrangeofthesurroundingrock．Finally,bycalculationtheconcl
8、usionisdrawnthatthetunnelisstableinspiteoflocalfailureofthesurroundingrock．Atthesametime，themonitoringhasbeenproceede
