盾构掘进过程中隧道管片上浮原因分析及控制-沈征难

:1009-6582(2004)06-0051-06盾构掘进过程中隧道管片上浮原因分析及控制沈征难(中铁二局广州地铁三号线盾构项目经理部,广州510300),,,:U455.43:A1,,,,,,GB50299-1999:,50mm5400mm,BG50157-92(5200mm)200mm,,100mm::;;,,,()2,20031026,407,,1(1),388~402,1025~26,104mm,132mm,1Table1Statisticsofsegmentdisplacementsandupwardmoving3883893903913923933943953963973983994001025/mm919083828277746257513628341026/mm100110110112118119125130130132130129128/mm92017303642516873819410194:2004-09-11:,,,.51416200412ModernTunnellingTechnologyVol.41No.6Dec.20041Fig.1Thetendencyofthesegmentverticaldisplacement,,,,33.1(1)Dd,D=D-d,,(2),,,,,,,,,,,2Fig.2Theperipheryoftunnelexcavation(2),,,:;;,,(),,,:,,,,,320031026,,,789,,;,,,,,3.2,:(1):,~,;,,,(K=3~5m/d),~,(),,()?,D=6000mm,300mm,1500mm,:52现代隧道技术3Fig.3LongitudinalprofileofthesectiononwhichoccurredsegmentupwardmovingG=192kN(8m3);F=424kN(42.4m3)FG,,(),(2):();();,:;;(,),,,,;,,,,,22Table2Mixingratioofagroutadoptedonasectionofwater-containedground/kg8060044040500:m3,4h.,(K=3~5m/d),;,()(),,,,,(2~3),,,,24,,2~3,,,,,:53盾构掘进过程中隧道管片上浮原因分析及控制,150%~200%(()),(1.5m)4.05m3,5.00m3,,(6.00m3~8.00m3),,,:,,(0.2kg/cm2),,,(3),,44Fig.4Distributionofpushingjacksonashield,,,,,C,,,,C,C,,388~40226.5,15.0,,C,C,(AC)30MPa,70t,,70t,,55Fig.5tressdistributionaroundasegmentring3.3(1),,,,,20M24,2~3,,,,,,3,,,(-)54现代隧道技术3Table3Comparisonofthecharacteristicsofadoptedgroutingliquids()()()(),40.5%,18.8%,,,6s,,9mm,,,,,A1A2A3BC(2),,(3),,,(),4,,4Table4MixingratioofanimprovedgroutFDN/kg160780350403908.5:m3,6h.,,(4),,,50mm,,,30MPa(5),,,,,,,,6~8,(6),,,,3.4,,,,,,,,,55盾构掘进过程中隧道管片上浮原因分析及控制4,,,(2/3D),?,,,,,,,,,,,,AnalysisandcontroloftheupwardmovingoftunnelsegmentsintheprocessofshieldexcavationShenZhengnan(ManagementDepartmentofShieldProjectsofthe3rdGuanzhouMetroLine,The2ndEngineeringBureau,C.R.E.C.,Guanzhou510300)AbstractSegmentdisplacementcontrolisthemostimportantmeasuretoinsurethetunnellinearityinaccor-dancewiththerequirementsofthedesignandthetunnelconstructionclearance.Atthesametime,synchronousgroutingisthekeyworkingproceduretoensurethesegmentfixedintime.Referringtogeologicalconditions,back-groutingoftunnelliningandshieldpostures,thearticleanalyzesandstudiesthereasonsofsegmentup-wardmovingintheprocessofshieldexcavationandputsforwardsomecountermeasures.KeywordsShieldtunneling;Segmentdisplacement;Analysis;Control欢迎订阅MODERNTUNNELLINGTECHNOLOGY1964,,():ISSN1009-6582,CN51-1600/U:62-197,:10,60,:118:610031:028-86649140,86649132:028-86643703,86649132:::7411110182600056036E-mail:[e-mail]56现代隧道技术