姑嫂树路跨铁路立交桥设计

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1、桥梁建设2014年第44卷第4期(总第227期)BridgeConstruction，Vo1．44，No．4，2014(TotallyNo．227)文章编号：1003—4722(2014)04—0080—05姑嫂树路跨铁路立交桥设计吴帅峰(中铁二院武汉勘察设计研究院有限责任公司，湖北武汉430074)摘要：姑嫂树路跨铁路立交桥采用(70+116+70)m变截面预应力混凝土连续箱梁桥，桥面宽32m。考虑其上跨1l股铁路轨道，为保证施工期间铁路的运营安全并尽量减少对铁路的干扰，该桥采用转体法施工(转体重量达1．73万吨，转体角

2、度最大为106。)，并将中跨合龙段从桥跨正中向大里程方向移动9．25m。该桥主梁采用单箱五室截面；主墩采用m形墩，钻孔灌注桩基础；转体系统主要由承重系统、顶推牵引系统和平衡系统三大部分组成，球铰尺寸为4m(Z63号墩)和3．9m(Z64号墩)。采用MIDASCivil2011、MIDASFEA等软件进行主梁、m形主墩、转体系统、横梁及桥面板静力计算，结果表明该桥的各项指标均满足规范要求。关键词：跨线桥；连续梁桥；箱形梁；m形墩；转体系统；桥梁设计；静力计算；有限元法中图分类号：U448．17；U448．215文献标志码：A

3、DesignofGusaoshuRoadOverpassSpanningRailwayswShuai—feng(WuhanSurvey，DesignandResearchInstituteCo．，Ltd．，ChinaRailwayEryuanEngineeringGroup，Wuhan430074，China)Abstract：TheGusaoshuRoadOverpassSpanningRailwaysisaprestressedconcretecontinuOUSboxgirderbridgeofvariablesec

4、tionwithspanarrangement(70+116+70)manddeckwidth32m．Consideringthattheoverpassisrequiredtospan11railwaylinesandtoensurethesafeop—erationoftherailwaysduringtheconstructionandminimizetheinterferenceoftheconstructiontotherailways，itiSdeterminedinthedesignthattheoverpa

5、ssshouldbeconstructedbytherota—tionerectionmethod(withtherotatingweightbeing17300tandthemaximumrotatinganglebe—ing106。)andtheclosuresegmentofthecentraIspanshouldbeshifted9．25mfromtherighteen-terO{thecentralspantowardsthedirectionofthemainmileage．Themaingirderofthe

6、overPassisofthecrosssectionoffivecellsandsinglebox．Themainpiersarethem—shapepierstobeSUP—portedontheboredpilefoundations．Therotationsystemismainlycomprisedofthebearingsys—tern，pushingandhaulingsystemandthebalancingsystem．Thedimensionsofthesphericalhin—gesarerespec

7、tively4mforthePierZ63and3．9mforthePierZ64．ThesoftwareMIDASCivil2011andMIDASFEAareusedtocalculatethestaticforcesofthemaingirder，m—shaDemainpiers，rotationsystem，crossbeamsanddeckslabs．Theresultsofthecalculationshowthatthevariousindicesoftheoverpasscansatisfytherelev

8、antrequirementsinthecodes．Keywords：overpass；continuousgirderbridge；boxgirder；m—shapepier；rotationsystem；bridgedesign；staticforcecalculation；finiteelemen