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时间:2020-04-22
《姑嫂树路跨铁路立交桥设计-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
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,转体角度
2、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:ADe
3、signofGusaoshuRoadOverpassSpanningRailwayswShuai—feng(WuhanSurvey,DesignandResearchInstituteCo.,Ltd.,ChinaRailwayEryuanEngineeringGroup,Wuhan430074,China)Abstract:TheGusaoshuRoadOverpassSpanningRailwaysisaprestressedconcretecontinuOUSboxgirderbridgeofvariablesectio
4、nwithspanarrangement(70+116+70)manddeckwidth32m.Consideringthattheoverpassisrequiredtospan11railwaylinesandtoensurethesafeop—erationoftherailwaysduringtheconstructionandminimizetheinterferenceoftheconstructiontotherailways,itiSdeterminedinthedesignthattheoverpasssh
5、ouldbeconstructedbytherota—tionerectionmethod(withtherotatingweightbeing17300tandthemaximumrotatinganglebe—ing106。)andtheclosuresegmentofthecentraIspanshouldbeshifted9.25mfromtherighteen-terO{thecentralspantowardsthedirectionofthemainmileage.ThemaingirderoftheoverP
6、assisofthecrosssectionoffivecellsandsinglebox.Themainpiersarethem—shapepierstobeSUP—portedontheboredpilefoundations.Therotationsystemismainlycomprisedofthebearingsys—tern,pushingandhaulingsystemandthebalancingsystem.Thedimensionsofthesphericalhin—gesarerespectively
7、4mforthePierZ63and3.9mforthePierZ64.ThesoftwareMIDASCivil2011andMIDASFEAareusedtocalculatethestaticforcesofthemaingirder,m—shaDemainpiers,rotationsystem,crossbeamsanddeckslabs.Theresultsofthecalculationshowthatthevariousindicesoftheoverpasscansatisfytherelevantrequ
8、irementsinthecodes.Keywords:overpass;continuousgirderbridge;boxgirder;m—shapepier;rotationsystem;bridgedesign;staticforcecalculation;finiteelemen
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