沌口长江公路大桥主桥设计.pdf

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1、桥梁建设２０１７年第４７卷第４期（总第２４５期）BridgeConstruction，Vol．４７，No．４，２０１７（TotallyNo．２４５）１文章编号：１００３－４７２２（２０１７）０４－０００１－０６沌口长江公路大桥主桥设计１２１１１冯鹏程，丁仁军，陈毅明，付坤，刘琪（１．中交第二公路勘察设计研究院有限公司，湖北武汉４３００５６；２．中交城市投资控股有限公司，广东广州５１００３２）摘要：沌口长江公路大桥是长江上首座双向８车道高速公路特大桥，主桥采用（１００＋２７５＋７６０＋２７５＋１００）m的双塔双索面钢箱梁斜拉桥。该桥为半飘浮体系，塔梁间采用弹性＋阻尼复合式减震装置。主梁采用

2、PK断面钢箱梁，箱梁总宽４６m（含风嘴），钢箱梁顶板与U肋采用双面焊接。桥塔采用钻石形结构，塔高２３３．７m，桥塔基础采用整体式群桩基础。全桥共２４０根斜拉索，采用空间双索面扇形布置，索体采用１８６０MPa高强平行钢丝。斜拉索梁端采用锚箱锚固，塔端采用钢锚梁锚固。辅助墩采用实体墩，墩柱顶部设系梁形成框架结构，墩柱下采用整体式承台＋直径３m的大直径桩基。过渡墩顶部设置较大尺寸的墩帽，墩柱下采用分离式矩形承台＋直径３m的大直径桩基。关键词：斜拉桥；半飘浮体系；PK断面钢箱梁；钻石形桥塔；斜拉索；复合式阻尼器；桥梁设计中图分类号：U４４８．２７；U４４２．５文献标志码：ADesignofMai

3、nBridgeofZhuankouChangjiangRiverHighwayBridge１２１１１FENGPengcheng，DINGRenjun，CHEN‐Yiming，FUKun‐，LIUQi‐（１．CCCCSecondHighwayConsultantsCo．，Ltd．，Wuhan４３００５６，China；２．CCCCUrbanInvestmentHoldingCo．，Ltd．，Guangzhou５１００３２，China）Abstract：TheZhuankouChangjiangRiverHighwayBridgeisthefirstbridgethatistocarrydua

4、l４‐laneexpresswaysovertheChangjiangRiver．Themainbridgeofthebridgeisasteelboxgirdercable‐stayedbridgewithdoublepylons，doublecableplanesandwithspanarrangement（１００＋２７５＋７６０＋２７５＋１００）m．Thebridgeisdesignedintothesemi‐floatingsystemandinbetweenthepylonsandmaingirder，theelastic＋dampingcompositedamperdevic

5、esarearranged．ThemaingirderisthePK（Pasco‐KennewickBridge）sectionsteelboxgirder，thetotalwidth（inclu‐dingthewindfairings）ofthegirderis４６mandthetopplateofthegirderandthestiffeningUribsareconnected，usingthetwo‐sidewelding．Thepylonsarethediamond‐shapeconcretestructures，theheightofthepylonsis２３３．７mandt

6、hefoundationsforthepylonsaretheintegralgrouppilefoundations．Therearetotally２４０staycablesforthewholebridge．Thecablesarearrangedinthespatialdoublecableplanesinthefanshapesandaremadeupofthe１８６０MPahigh‐strengthparal‐lelsteelwires．Atthemaingirder，thecablesareanchored，usingthesteelanchorboxeswhileatthe

7、pylons，thecablesareanchored，usingthesteelanchorbeams．Theauxiliarypiersarethesolidpiers．Atthetoppartsofthecolumnsofthepiers，thetiebeamsarearrangedtomakethecolumnsthefamestructuresandunderthecolumnsaretheintegralpilecaps