大断面黄土隧道变形规律及预留变形量研究

466(329)200912Vol.46，No.6，Total.No.329Dec.2009MODERNTUNNELLINGTECHNOLOGY1121（1，610031；2，610031），。：、，；；，；40m，；40m，。：，10～15cm；，25～28cm。：TU456.3+1：A：1009-6582（2009）06-0064-06：2009-06-11：，2005K001-D(G)-2.：(1979-)，，，，，E-mail：[e-mail].1，。，170m2，。，，。，。《TB10003-2005》[1]，、，、、、，；，1（、；、）。，[2]，1。，1Table1Referencesoftunnelpresetdeformations，，，[3~7]。，，。2：/mm/mm—10～3010～3030～5030～5050～8050～8080～12064466(329)200912Vol.46，No.6，Total.No.329Dec.2009MODERNTUNNELLINGTECHNOLOGY，，，，，。、（）、、、。，、，，。，，，，，。：（）（）。33.1，。2006，11386，。，[2]。，：，，；，，。3.2，12，1。，、、，、（CRD）、。，；、、。、。2Table2Supportparametersoftheloesstunnelsinvestigated/cm/m/m/m/m/cm/m/cm/cm××××3Table3TemporarysupportparametersfortheCRDmethodandthedoublesideheadingsmethodI18I18φ22/cm20/16/m13.2/23.128.35/19.93.5/3.5/m0.8/0.80.8/0.82.0/2.4/m1.0/1.0：，“/”.65466(329)200912Vol.46，No.6，Total.No.329Dec.2009MODERNTUNNELLINGTECHNOLOGY1(：cm)Fig.1Designedcross-sectionoflargesectiontunnelsinloess3.3（1）303，。2。-，：①，，。，。②，，。③，2IV-（)Fig.2Graphofdisplacementsvs.timeonrepresentativesectionsforgradeIVsurroundingrocks(HanGuGuantunnel)95%，，。（2），34。34，40m，（）3IVFig.3Archcrownsubsidencevs.overburdensforgradeIVsurroundingrocks66466(329)200912Vol.46，No.6，Total.No.329Dec.2009MODERNTUNNELLINGTECHNOLOGY4IVFig.4Horizontalconvergencesvs.overburdensforgradeIVsurroundingrocks。，，10cm。，。，，7.5cm。（1）83，。5。-，：①，，，，。②，95%，，。③，，。（2），6，7。5-（）Fig.5Graphofdisplacementsvs.timeonrepresentativesectionsforgradesurroundingrocks(PangDongtunnel)6Fig.6Archcrownsubsidencevs.overburdensforgradesurroundingrocks7Fig.7Relationshipbetweenoverburdensandhorizontalconvergencesforgradesurroundingrocks67466(329)200912Vol.46，No.6，Total.No.329Dec.2009MODERNTUNNELLINGTECHNOLOGY6，，25m（），，，，，。，，30cm，，。7，。。，。4，，，。，。80%，。，。4.1，，，8。8Fig.8Relationshipbetweentheguaranteeratiosandthepresetdeformationsforgradesurroundingrocks8，7.5cm、10cm25cm，93.46%、97.39%100%。，，10~15cm。4.2，，，9。9Fig.9Relationshipbetweenguaranteeratiosandpresetdeformationsforgradesurroundingrocks9，20cm、25cm28cm，53.01%、83.18%96.39%。，，25~28cm。5，，：（1）、，。（2），。（3）40m，；40m，。，。（4），。，。（5），68466(329)200912Vol.46，No.6，Total.No.329Dec.2009MODERNTUNNELLINGTECHNOLOGY，，（），10~15cm；（），25~28cm。References[1].TB10003-2005,J449-2005[S].2005MinistryofRailwaysofthePeople'sRepublicofChina,TB10003-2005,J449-2005CodeforDesignonTunnelofRailway[S].2005[2].[R].2009ChinaRailwayEryuanEngineeringGroupCO.LTD.StudyontheReasonableSupportParametersandtheControlTechnologyofSurfaceSubsidence[R].2009[3]，.[J].，2008，8（3）：285~289JianLei，GaiYingzhi.PresetDeformationofLargeCross-sectionSub-seaTunnelsinSoftGroundanditsImpactonSteelArches[J].TunnelConstruction,2009,28(3):285~289(inChinese)[4].[J].，1994，（4）：22~24LanBing.DiscussionontheReasonableSupportParametersofShotcreteandRockBoltinWeakRockTunnel.MineConstructionTechnology,1994,（4）:22~24(inChinese)[5]，.[J].，2005，42（2）：7~13QingSanHui,HuangRunqiu.StudyontheLargeDeformationCharacteristicsoftheSoftRocksinWushaolingtunnel[J].ModernTunnellingTechnology,2005,Vol.42(2):7~13(inChinese)[6]，.[J].，2008，（9）：174~179HanChangling,ZhaoYongguo.TheDifficultiesofDesignandConstructionandCountermeasureonLarge-crosssectionTunnelinShales[J].Highway,2008,（9）:174~179(inChinese)[7].[J].，2008，（9）：77~80YangYing.TheGeologicalCharactersandConstructionCountermeasuresCorrespondingonTunnelthroughShale(T3sn)inDali-LijiangRailway[J].JournalofRailwayEngineeringSociety,2008,（9）:77~80(inChinese)StudyontheDeformationRegularityandPresetDeformationsforLargeSectionTunnelsinLoessZhaoDongping1YuYu1WangMingnian2YangJianmin1(1ChinaRailwayEryuanEngineeringGroupCo.,Ltd.,Chengdu610031;2SchoolofCivilEngineering,SouthwestJiaotongUniversity,Chengdu610031)AbstractPrimarysupportdeformationsoflargesectiontunnelsinloesswereanalyzedstatistically,theirdeformationregularityandthereasonableselectionrangesofpresetdeformationsforthemwerestudied.Thedeformationregularityoflargesectiontunnelsinloessismanifestedthatthesettlementdifferencebetweenthearchcrownandspringlineissmall,thetotalsubsidenceofthetunnelcrownwilloccurinacertainextentaftertunnelexcavation;thesubsidenceofthearchcrownisalwayslargerthanthehorizontalconvergence;thedisplacementaroundthetunnelwillnotincreaseagainaftertheprimaryliningclosedintoawholesection;whentheoverburdenoftunnelislessthan40m,thetunneldeformationsarelargerandtheregularityisnotobvious,andwhentheoverburdenoftunnelislargerthan40m,thedistributionoftunneldeformationsisrelativelyconcentrated.Basedonthestatisticalanalysisofin-situmeasurementdata,therecommendedpresetdeformationrangeofthelargesectiontunnelsinloessforgradesurroundingrocksis10cmto15cm,and25cmto28cmforgradesurroundingrocks.KeywordsLargesection;Tunnelsinloess;Deformationregularity;Presetdeformation69