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(,450053):(72+128+72)m,,,,;0,0,2T,,,,,:;;;:U448.23;U445:A:1671-7767(2010)02-0020-04(65),,,,,,(q@y)1,(72+128+72)m,273.4m,8.5m,6.1m,4.4~8.8m,6,(12),68m76m11,V,,,22.119.2m12m;29.2m13.2m,,15m18m,1QTZ40,YT-28,42mm,1m,,5,,1m,,,4,,:C15,:!,FDN,;#,;,;%,,;&,,2.212,682020102:2010-01-08:19-19882009Email:keiangcaoeah.netm76m,,,,,,,3,1.5,3.0,1.5m,4.5m,,,2,,312,0;0,2T,03;,3.10012m,350.9m3,930t0(1)0,,,02,15.4m(0.8m,),,209.7m3;24.2m,164m3(2)0,2(3),12010mm12mm(4),FAC,I,:410kg/m3,22%,0.34,43%,(20020)mm3.2:216,43.0m+63.5m+64.0m;217,43.0m+63.5m+74.0m153.4t3.2.1,(75t)32:!;,;2.0,2.0[1]21203,2,,1.2,212t,,600kN,2j32,,1/2(106t),,9mm3.2.20,:,,,,1,,,,,,,1,,,,,:,,,(8t3.33.7m,65m3,172.2t,,,,,4,LQZ,1,,18),03-4.8cm5.4cm()43.43,2.0m,21.9m3,58.0t,,()22),T1000kN,25%50%75%100%,T,,,,,,,,,,T++22201021d,,,3.5,:(1),50cm,,(2),,;75mm;,,,(3)90%,,5d,,,,,,,,2.57%(4),,,(,),M40,JH-MCI-2005,-0.1~-0.08MPa3.6,,:;;1,4,,10mm,55420067,200810151210,PC,,,,:[1]TB10203-2002,[S].ConstructionTechniquesforRightLineBridgeoftheSecondXiangfanChongqingRailwayCrossingZhuxiRiverOKq(3)23CAeiang2-,1/4,,,,,20083,,,,DesignandConstructionofMainBridgeofMingzhouBridgeinNingboQUANJun(TongtuInvestmentandDevelopmentCo.,Ltd.,NingboCity,Ningbo315000,China)Abstract:TheMingzhouBridgeinNingboisanimportantbridgecrossingtheYongjiangRiver.Thebridgeisadoubleleghalfthroughsteelboxbaskethandletiedarchbridgewithspanarrangementforthemainbridgebeing(100+450+100)m.Thearchseatsofthebridgearethesteelandconcretecompositestructures.Thearchribsoftheupperandlowerlegsarethefullyweldedsteelboxsectionsandthestiffeninggirderisthefullyweldedsteelboxgirdertoppedwithorthotropicdeckplate.Inbetweenthecrossbeamsatbothendsofthemainbridge,twogroupsofhorizontalcablesarearranged.Thesteelarchseats,sidespanarchribsandthestiffeninggirderareerectedonthescaffoldingwhilethecentralspanarchribsandthestiffeninggirderareerectedbythe400tcapacitycablecrane.Inthispaper,thedesignandconstructionofthecriticalpartsofthelongspandoublelegsteelboxtiedarchbridgearemainlypresented.Keywords:MingzhouBridge;tiedarchbridge;bridgedesign;bridgeconstruction(23)(The1stEngineeringCo.,Ltd.,ChinaRailwayMajorBridgeEngineeringGroup,Zhengzhou450053,China)Abstract:TheRightLineBridgeoftheSecondXiangfanChongqingRailwayCrossingZhuxiRiverisathreespanprestressedconcretecontinuousrigidframebridgewithspanarrangement(72+128+72)m.ThemaingirderoftheBridgeisasinglecellsingleboxstructureandthepierssupportingthegirderaretherectangularoneswithvariablecrosssections.Thepiersrestonthefoundationssocketedintheground,arebuiltbytheturnoverformworkandtheanticrackingconstructionmeasuresforthemassiveconcreteofthepiersareaccordinglytaken.TheconstructionofthegirderproceedsfromsegmentsNo.0thatarecastonthepiertopbracketsandthefurthermoresegmentsofthegirderarecantiveredlycastinsymmetrybythelightweightformtravelersfrombothsidesofthesegmentsNo.0tofinallyformtwoTframes.Atthesametime,thesidespansarecastonthescaffoldingsatthetwoabutments.Thecentralspanisclosedfirstandthesidespansareclosedlatetomakethegirderacompletecontinuousrigidframesystem.Intheprestressingconstruction,thevacuumgroutingtechniqueisappliedtogroutingoftheprestressingductsandthegeometricshapeofthegirderhasalsobeenmonitoredandcontrolledinthewholeconstructionprocess.Kyf;f;f;3220102ewords:rigidramebridgebridgeoundationormtravelerbridgeconstruction