沪通长江大桥天生港专用航道桥设计

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1、桥梁建设2015年第45卷第6期(总第235期)BridgeConstruction，Vo1．45，No．6，2015(TotallyNo．235)53文章编号：1003—4722(2015)06—0053～06沪通长江大桥天生港专用航道桥设计侯健，彭振华，张燕飞(中铁大桥勘测设计院集团有限公司，湖北武汉430056)摘要：沪通长江大桥天生港专用航道桥为刚性梁柔性拱桥，跨径布置为(140+336+140)m。主梁采用三主桁双层板桁组合结构，主桁采用华伦式桁架，焊接整体节点，桁高16．0m。铁路及公路桥面均采用正交异性板整体钢桥面

2、，上层为公路桥面，标准宽度为33．0m，设双向2横坡；下层为铁路桥面。主拱采用抛物线形，拱肋采用钢箱截面，截面高1．8m、宽1．2m。拱肋与主桁的上弦杆采用柔性吊杆连接，吊杆采用平行钢丝成品索，全桥共57组。主墩基础采用钻孔桩基础，墩身采用墩顶设置墩帽的单箱三室空心墩结构。设计采用了先梁后拱的指导性施工方案。关键词：公路铁路两用桥；钢桁拱桥；刚性梁柔性拱；双层板桁组合结构；空心墩；先梁后拱；结构设计；施工方案中图分类号：U442．5；U448．22文献标志码：ADesignofTianshengPortSpecialShipCh

3、annelBridgeofHutongChangjiangRiverBridgeHOUJian，PENGZhen-hua，ZHANGYan—fei(ChinaRailwayMajorBridgeReconnaissance&DesignGroup’Co．，Ltd．，Wuhan430056，China)Abstract：TheTianshengPortspecialshipchannelbridgeoftheHutongChangjiangRiverBridgeisaflexiblearchbridgewithrigidgirde

4、rwithspanarrangement(140+336+140)m．Themaingirderofthebridgeisthedouble—deckplateandtrusscompositestructuremadeupofthreemaintrusses．ThemaintrussesaretheWarrentrusseswithweldedintegralpanelpointsandtheheightofthetrussesis16．0m．Therailwayandhighwaydecksarealltheintegral

5、orthotropicplatesteeldecks．Ontheupperdeck，thehighwaydeckisarranged，thestandardwidthofthedeckis33．0mandthedeckisprovidedwithdual2transverseslopes．Onthe1owerdeck，therailwaydeckisarranged．Themainarchisdesignedintotheparabolicshapeandthecrosssectionofaarchribisthesteelbo

6、xsectionthatis1．8mhighand1．2mwide．Thearchribandtheupperchordofamaintrussareconnectedbytheflexiblehangers，thehangersarethefinishedparalle1steelwirecablesandtherearetotally57groupsofthehangersforthewholebridge．Thefoundationsforthemainpiersaretheboredpilesandthepiershaf

7、tsarethethree—cellsingle—boxhollowpierstoppedwithcappingbeams．Inthedesignofthebridge，theguidelineconstructionschemeoferectingthemaingirderfirstandarchlateisadopted．Keywords：rail—eum—roadbridge；steeltrussarchbridge；flexiblearchwithrigidgirder；double—deckplateandtrussc

8、ompositestructure；hollowpier；erectingmaingirderfirstandarchlate：structuraldesign；constructionscheme1工程概况工程，线位距上游的江阴长江大桥约45km，距下游沪通长