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ID:36507718
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页数:5页
时间:2019-05-11
《广西贵港西南大桥主桥设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、桥梁建设2015年第45卷第l期(总第230期)BridgeConstruction,Vo1.45,No.1,2015(TotallyNo.230)lO3文章编号:1003一1722(2015)01—0103—05广西贵港西南大桥主桥设计李翠霞,张巨生(中铁大桥勘测设计院集团有限公司,湖北武汉430056)摘要:广西贵港市西南大桥主桥为(46+88+280+88+46)m双塔双索面预应力混凝土边主梁斜拉桥。主梁采用等高度带悬臂的矩形混凝土边主梁与“工”字形钢横梁相结合的形式,整幅桥面宽36.5ITI,设双向2.0%横坡。桥塔采用“鱼”状流线弧形框架钢筋混凝土结构,塔柱
2、高102.5m,采用外侧为“D”形圆弧段的箱形截面。桥塔设上、下横梁,均采用预应力混凝土单箱单室结构。全桥共设136根斜拉索,斜拉索采用≠15.2mm镀锌钢绞线索,空间双索面扇形布置。桥塔墩采用分离式基础,上、下游分离式基础中心距34.7m,其下各设9根2.5m钻孔桩。承台为正方形钢筋混凝土结构。4号墩顶面设一圆端形塔座。关键词:斜拉桥;边主梁;钢横梁;桥塔;钢绞线斜拉索;分离式基础;结构设计中图分类号:U448.27;U442.5文献标志码:ADesignofMainBridgeofXinanBridgeinGuigangCity,GuangxiLJCui-xia,
3、ZHANGJu—sheng(ChinaRailwayMajorBridgeReconnaissance&DesignGroupCo.,Ltd.,Wuhan430056,China)Abstract:ThemainbridgeoftheXinanBridgeinGuigangCity,Guangxiisaprestressedconcreteedgemaingirderscable—stayedbridgewithdoublepylons,doublecableplanesandwithspanarrangement(46+88+280+88+46)m.Themaing
4、irdersofthebridgeareofthestructuraltypecombiningtherectangularconcreteedgemaingirdershavingconstantdepthandcantileverswiththeI~shapestee1crossbeams.Thewidthofthewholebridgedeckis36.5mandthedeckisprovidedwithdual2.0transverseslopes.Apylonofthebridgeisthe“fish”一shapestreamlinedareframerei
5、nforcedconcretestructurethatis102.5minheightandtheoutersideofthepylonisofthe“D99_sh.aperoundarcboxsection.Theupperandlowercrossbeamsofthepylonarealltheprestressedconcretesingle—cellsingle—boxstructures.Therearetotally136staycablesarrangedforthewholebridge.Thestaycablesarethe15.2mmgalvan
6、izedsteelwirestrandcablesandarearrangedinfanshapeandspatialdoublecableplanes.Thepylonpierissupportedonthesep—aratedfoundations.Thecenter—to—centerdistanceofthefoundationsontheupstreamanddown—streamsidesis34.7mandineachfoundation,9nos.of2.5mboredpilesarearranged.Thepilecapsofthefoundatio
7、nsarethesquarereinforcedconcretestructuresandatthetopofPierNo.4,around-endpylonbaseisarranged.Keywords:cable—stayedbridge;edgemaingirder;steelcrossbeam;pylon;steelwirestrandstaycable;separatedfoundations;structuraldesign1工程概况横跨郁江。项目起点位于迎宾大道,终点位于江南广西贵港市西南大桥位于贵港市中心城区东西大道,线路全长约452
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