1。,3022m,14.96m,14.5m,13.3m,。,4%,5.5m,0.37D(D),1,[1],,,:(1),,,,,;(2)⑦-1,,,,,,;(3)14.96m,5.5m,,,;(4),,,,。114.96m1,2(1.(),430074;2,250014):Ф14.96m,、、,,。:;;;;:U445.43:A:1672-9889(2009)03-0077-03ChamberConstructionTechniqueforMix-shieldwithSuper-largeDiameterChenJian1,2(1.ChinaUniversityofGeosciences,Hubei430074,1China;2.ChinaRailway14thGroupCo.,Ltd,Shandong250014,China)Abstract:AccordingtothetechniqueofchamberestablishmentwithcomprehensivecontrolmeasurestakenintheΦ14.96mmix-shieldlaunchingofNanjingYangtzerivertunnel,thispaperintroducespreparation,operatingprocedureandpressurecontrolofchamberconstructiondetailed.Thetechniqueofpressurechamberconstructionwithdoublesealsissummarizedsystematicallywhichcouldbereferedforavoidinglaunchingrisksinsimilarprojects.Keywords:tunnel;mix-shield;techniqueofchamberestablishment;pressurecontrol;seal:(1973-),,,,。6320096Vol.6No.3June2009ModernTransportationTechnology2009[2],,,,,,,。1:1Φ14.96m22.1(1),、、;(、);(、)。(2),、、,,,。2.2,,23Φ45,,;、2、、,20Φ45,2。,2,,2,2,,,,。22.3,18m,[3],。,,125kPa,5.5m,,75kPa,,125kPa。2.42.4.12,1,HS-1HS-2,19s,1.1。、,2100m3,,2400m3;P1,,P2,。2,,HS-2,∶∶=0.112∶0.04∶1,23s,1.1g/m3,,Φ45。2.4.23,1,3m;20.75kPa,,,3。,、,,,/kN·m39945/kN198000/kPa750DN5002/(m3·h-1)2500/(m3·h-1)280078··3;3,,,,。4,:4(1)、,,,P1、P2,,250~300m3/h,。(2),。,3m,。(3),2,,。(4),,。(5),,10kPa75kPa。,、、、,。,。(6),,,,。,,。75kPa15min,、,,45min,。(7),,,P2,P25kW,,。43,,,,。:(1)。,,,,。(2)2、,,。(3),10kPa,5kPar,。,,。[1],.[M].:,1991.[2].[M].:,2004.[3],,.[M].:,2004.(:2009-01-19):79··