仁义河特大桥主桥施工技术

:1003-4722(2003)S0-0056-03(,510800):80m+4145m+80m()2.0m(70m),;(73.5m),;0:;;;;:U448.23;U445.4:AConstructionTechniquesforMainSpansofRenyiheBridgeAIZhan2xiang(The3rdEngineeringCompanyofChinaZhongtieMajorBridgeEngineeringGroupCo.,Ltd.,Huadu510800,China)Abstract:ThemainspansofRenyiheBridgeareaprestressedconcretecontinuousrigid2framebridge(singlecellsingleboxgirdertype)withthespansarrangedas(80+4145+80)m.Thepilefoundationsofthemainspansconsistofpileseachbeing2.0mindiameterandwithmaximumpilelengthupto70m,whicharebuiltinholesexcavatedmanually.Thehigh2risepiers(73.5minmaxi2mumheight)alsoofthemainspansaredesignedasreinforcedconcretetwincolumns,thin2wallhollowpiersthatareconstructedwithreversiblesteelformwork.Allsegmentsofthesuperstructureboxgird2ersarecastinsituwithtravelingcarriageswithfreebalancedcantilevermethodexceptthatSegmentNo.0castinsituonbentframe.Thispaperpresentsthesuccessfulexperiencesofmanualexcavatingofholesfordeeppiles,buildingofhigh2risethin2wallpiersandconstructionoflong2spanboxgirderswithcantilevercast2in2situmethodinamountainareawherewaterisdeficient,freezingspellislengthyanddisturbanceofnaturalenvironmentaroundthebridgesiteisveryrestrictive.Keywords:rigid2framebridge;hollowpier;prestressedconcretestructure;boxgirder;bridgeconstruction:2003-02-11:(1968-),,,1991,1,,1140m(LK87+138.5),:540m(T)+80m+4145m+80m+450m(T);1100m(RK87+158.5),:440m(T)+80m+4145m+80m+450m(T),80m+4145m+80m()U,,,,610,44.5m55m57.5652003©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.m71m73.5m,511,36m72m;59,40.5m53.5m55.5m71.5m73.5m,410,37.99m60.0m,92.0m,41.8m,:13.6m13.6m3.5m;8.2m7.9m2.0m,111P2,78,,,,:(),,30,2,,:,,()();,,,,,,,166,90,1634m,70m,,,,,,15(2001320025),,,,33.1,,,,10.5,4.0m,,()3.2647.44m3(C30),129.6m3(C30),,,325mm,,,,,,,,44.1,6.5m2.5m,60cm,4m,3(2.5m+2.5m+2.5m),7.5m,5.0m,104.2,,273.5m,40.5m,,,4.328(2),,,7m4.475©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2(3),12(1)1600kNm,50m,()34.573.5m,1559.3m3,C5011728.3m3(10),2()2,4.6,,1020016,200111,6,55.100,,,,,5.20(),,2,20,60tP,(C50)19683m3,,,,5060h(4)20011220021118(),1246,,,,,,,,20001220035,200211,,,852003©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.