武汉市姑嫂树路跨铁路桥设计方案比选

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1、桥梁建设2015年第45卷第2期(总第231期)BridgeConstruction，Vo1．45，No．2，2015(TotallyNo．231)99文章编号：1003—4722(2015)02—0099—06武汉市姑嫂树路跨铁路桥设计方案比选赵彬强(武汉市政工程设计研究院有限责任公司，湖北武汉430023)摘要：武汉市姑嫂树路主线高架需要上跨京广铁路等多条铁路线，为避免或减少施工期问及日后维护对铁路运营和地面交通的影响，研究该桥设计方案选型。考虑铁路现状及桥跨布设控制条件，选择与工程实际较适宜的(65+l10+65)m悬臂浇筑变截面预应力

2、混凝土连续箱梁桥、转体施工变截面预应力混凝土连续箱梁桥、部分斜拉桥3种桥型方案进行对比分析。基于功能性和安全性的考虑，由于转体施工变截面预应力混凝土连续箱梁桥方案仅需在转体期间2～3h内封闭铁路，其余时间对铁路运营无影响，综合经济性、施工难度、养护费用等因素，最终选择采用该方案。关键词：跨铁路桥；城市高架桥；连续梁桥；部分斜拉桥；悬臂浇筑；转体施工；方案比选中图分类号：U448．17；U442．54文献标志码：AComparisonandSelectionofDesignSchemesforGusaoshuRoadMainLineViaduc

3、tSpanningRailwaysinWuhanCityZHAOBin—qiang(WuhanMunicipalEngineeringDesignandResearchInstituteC0．，I⋯tdWuhan430023，China)Abstract：TheGusaoshuRoadMainLineViaductinWuhanCitywasrequiredtospanBeijing—GuangzhouRailwayandseveralotherrailways．ToavoidorIessenthepossibleinterferenceof

4、theviaductwiththerailwayoperationandgroundtrafficintheconstructionandfuturemaintenance，thedesignschemesfortheviaductwerestudied．Inconsiderationofthecurrentsituationsoftherailwaysattheviaductsiteandthecontrolconditionsofspanarrangementoftheviaduct，3typesofthebridgeschemestha

5、tweresuitablefortheviaduct，i．e．the(65+110+65)mprestressedconcretecontinuousboxgirderbridgewithvariablesectionthatwastobeconstructedbythecanti—levercasting·theprestressedconcretecontinuousboxgirderbridgewithvariablesectionthatwastobeconstructedbytherotationerectionandtheextr

6、adosedbridge，werecomparedandanalyzed．InaccordancewiththerequirementsforthefunctionandsafetyoftheviaductandalsOincomDre—hensiveconsiderationofthefactorsoftheeconomy，constructiondifficultiesandfuturemainte—nancecost，theschemeoftheprestressedconcretecontinuousboxgirderbridgewi

7、thvariablesee-tionthatwastobeconstructedbytherotationerectionwasfinallychosensincetheschemeon1vre-quiredtheclosureoftherailwaysfor2～3hoursduringtherotationerectionandinothertime。wouldcausenoinferencewiththerailwayoperation．Keywords：bridgespanningrailway；cityviaduct；continuo

8、usgirderbridge：extradosedbridge；cantilevercasting；rotationconstruction；schemecompa