下坞蓟运河特大桥跨津山铁路施工方案设计

(,450053):,12716m,,,2,,:;;;;:U448.17;U445.463:A:1671-7767(2010)02-0009-04(6),,,,(qxj@6)1,12716m,115.92m,2.0m,12.0m,2.8m3.0m20.9m,,4.16m;,K211+483.42~K211+662.36,178.94m,2560m212:;;716m;,,,2(12),,7,33.1106~110,,1,,1,0~109:2010-01-22:197-1988Email:d1w12.com12212,1,213H700300,6mm14mm28H700300,20mm,,;,,,!30150cm,,3.2:,;,;,,,[1],0.5kN/m2,120km/h100kg4.5m,,134MPa,15.4mm[2],,10m15m1;0.4m,1m106~1111,,20cm,,,,9m,,,,2.0~3.8m,,,,,,,[3]4.24.2.1,,,1.2,4.2.21061081290min,,,,,,,,,,60min,,,,,,3102010244.134.34.3.12,1104,,21084.3.2,,104108,1105106107,21091101114.44.4.1,1106,21081106,21084.4.2,,,,,,,,,,106108,10710911044.57115.92m,,,,,4.5.1,121041052,,H7004mm,2105106,,,,4.5.2,;,,;,;7511454.6,2,,,,,,5,,,;,,,,6,,,,2,,,:[1].[M].:,2005.[2]GB50017-2003,[S].[3],.[M].:,1999.ConstructionSchemeDesignofXiawujiCanalBridgeCrossingTianjinShanhaiguanRailwayWUXiangjun(The1stEngineeringCo.,Ltd.,ChinaRailwayMajorBridgeEngineeringGroup,Zhengzhou450053,China)Abstract:TheXiawujiCanalBridgeonthenewlybuiltTianjinQinhuangdaoPassengerDedicatedRailwaycrossesTianjinShanhaiguanRailwayinaskewwaywithskewangleofonly12.Thesuperstructureofthebridgeis7spansof16mcontinuousboxgirderandthepiersthatsupportthesuperstructurearetheportalframepiers.Beforetheconstructionofthefoundationsofthebridge,theequipmentonthesideoftheexistingrailwaywereremovedandprotected.Becausetheconcreteforthecrossbeamsofthepiersandthecontinuousboxgirderhadtobecastinsituovertherailway,theconstructionoftheconcretewasdesignedtobecarriedoutonthecombinedmovableprotectionscaffoldings.Priortotheassemblingofthescaffoldingsinfield,thetwosetsofthescaffoldingsweretrialassembledandunderwenttestofthestaticloadplacedonthem.Intheconstructionofthepiersandthecontinuousboxgirder,thescaffoldingswereusedforprotectionoftherailwaythatwasinoperationandastheprincipalloadbearingstructures,thescaffoldingshelpedtocompletetheconstructionofthecrossbeamsofthepiers.Kyy;;f;ff;1220102ewords:passengerdedicatedrailwaoverpassbridgeportalramepiermovableprotectionscaoldingbridgeconstruction