超高水压大直径盾构隧道管片接缝防水设计与试验研究

3.211800)U455.43A10004548(2013)S1022705(1976)E-mail:[e-mail]studyonwaterproofgasketoflarge-diametershieldtunnelunderultrahighwaterpressureTUOYong-fei1,SHUHeng1,GUOXiao-hong1,DINGWen-qi2,WANGJian3(1.CCCCSecondHighwayConsultantsCo.Ltd.,Wuhan430056,China;2.GeotechnicalEngineeringDepartment,TongjiUniversity,Shanghai200092,China;3.CCCCNanjingWeisanRd.River-crossingTunnelConstructionHeadquarters,Nanjing211800,China)Abstract:Fortheprojectoflarge-diametershieldtunnelunderthehighestwaterpressureinChina,asetofdesignprocessandresearchmethodisproposedforthewaterproofgasketforsegmentjoints,andtherelatedpatternisstudied.Firstofall,basedontheworldwideresearchprogress,combinedwiththeengineeringcharacteristics,adoublesealelastomerarrangementforsegmentjointwaterproofgasketoflarge-diametershieldtunnelundertheultrahighwaterpressureisdetermined.Secondly,thetechnicalstandardofwaterproofisstudied,anditlaysthebasisforfurtheranalysisoftheelasticgasketdesignandexperiment.Thirdly,comparativeanalysisofseveralsectionsofelasticsealgasketsisperformed.Finally,asetofuniquedeviceandmethodisadopted,performingtheexperimentsonthewaterproofabilityandassemblyforceofthegaskets,andthroughthecomprehensiveanalysisoftheexperimentdata,theoptimaldesignschemeofthewaterproofgasketforsegmentjointisdetermined.Keywords:ultrahighwaterpressure;largediameter;shieldtunnel;waterproofgasketforsegmentjoint;experimentalstudy;elasticgasket201304082282013[1]0.570.650.60MPa0.72MPa14.5m0.6m2.0mWesterschelde[2-5]1Fig.1Arrangementofwaterproofgasket[6]57.5m72.0m0.72MPa0.72MPa1.3MPa1mm2mm5mm2mm2mm1mm5mm15mm6mm15mm100a1.2EPDM100a0.6565%=/=0.72MPa1.2/0.65=1.3MPa123245mm12mm54.6mm45+4.82597.6mm245+54.612/21.2297212312345567Fig.2Basicsectionformofelasticgasket1Table1DesignparametersofelasticgasketsS/mm2S/mm2S/mm2S/mm21934.50232.28109.22593.002934.50222.46134.95577.093934.50232.28109.22593.004856.50155.90130.70569.905856.50169.16116.28571.056856.50149.19136.26571.057856.50160.36121.04575.10S/SS/S10.370.680.9920.4520.380.620.9660.4530.370.680.9920.4540.330.540.9540.4050.330.590.9560.4060.330.520.9560.4070.330.570.9620.40EPDM2302013POP-MPC015mmT118mm0.75MPa0.72MPa7mm4.5mm1.75MPa1.3MPa3mm3.25MPa228mm0.65MPa0.72MPa17mm4mm1.3MPa3mm2.25MPa1.7338mm0.48MPa0.72MPa4mm1.1MPa3mm1.75MPa448mm0.62MPa0.72MPa6mm0.8MPa2mm2.5MPa556770706715mm38mm670.72MPa700.75MPa7mm670.80MPa700.95MPa6mm671.0MPa701.1MPa667015mm38mm0.80MPa7mm1.0MPa6mm1.25MPa777015mm38mm0.75MPa7mm1.0MPa6mm1.30MPa15mmFig.3Relationshipbetweenwaterresistantpressureandopeningdisplacementofjoint(dislocation15mm)82715mm8mm7mm6mmTable2Experimentalresultsofwaterproofability/MPa/8mm7mm6mm1670.750.901.252670.650.750.953600.480.550.624670.620.730.805670.720.801.005700.750.951.106700.801.001.257700.751.001.306mm15mm0.72MPa1.3MPa277100kN/m1.23141713457Fig.4Relationshipbetweenassemblyforceandopening..displacementofjoint1326160kN/m457100kN/m710.72MPa2370mm15mm6mm45776[1].[M].:,2004.(ZHANGFeng-xiang.Shieldtunnel[M].Beijing:People'sCommumicationPress,2004.(inChinese))[2],,,.[J].,2008(4):1216.(LUMing,LEIZhen-yu,ZHANGYong,etal.WaterproofingtestofliningjointandcrosspassageofShanghaiYangtzeRiverTunnel[J].UndergroundEngineeringandTunnels,2008(4):1216.(inChinese))[3],,,.[J].,2003(4):1517.(WUXiang-zu,ZHANGQing-he,LIDa-yong,etal.Waterproofingtechnologyandleakinganalysisforshield-driventunneloftheNanjingsubway[J].ChinaBuildingWaterproofing,2003(4):1517.(inChinese))[4].[J].,2010(10):3035.(XIANGKe.Optimizationdesignandexperimentalstudyofshieldtunnelelasticgasket[J].ChinaBuildingWaterproofing,2010(10):3035.(inChinese))[5],,,.[J].,2008(1):144149.(ZHAOYun-chen,XIAOLong-ge,LIUZhao-wei,etal.ExperimentstudyanddesignonthewatertightsealforreinforcedconcretesegmentjointofWuhanYangtzeRiverTunnel[J].ModernTunnellingTechnology,2008(S1):144149.(inChinese))[6].[R].:,2012.(CCCCSecondHighwayConsultantsCoLtd.Testandnumericalstudyonwaterproofreliabilityofshieldsegments[R].Wuhan:CCCCSecondHighwayConsultantsCoLtd.2012.(inChinese))