深埋隧洞围岩稳定性研究

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1、深埋隧洞围岩稳定性研究密级：公开TheStudyOilAdjoiningRockStabilityofDeep—lyingTunnel(申请石家庄铁道学院授予工学硕士学位沦文)培养单位：专业：研究生：指导教师：土木工程分院桥梁与隧道工程张小明赵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