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1、荊岳長(zhǎng)江公路大橋設(shè)計(jì)丁望星,姜友生57文章編號(hào):1003—4722(2011)04—0057—05荊岳長(zhǎng)江公路大橋設(shè)計(jì)丁望星,姜友生(湖北省交通規(guī)劃設(shè)計(jì)院,湖北武漢430051)摘要:根據(jù)荊岳長(zhǎng)江公路大橋橋址處自然環(huán)境條件,主橋采用主跨816m雙塔雙索面六跨不對(duì)稱混合梁斜拉橋;橋塔為雙柱H形,北塔采用雙圓形分離式基礎(chǔ),南塔采用矩形分離式承臺(tái)+群樁基礎(chǔ);主梁采用分離式雙邊箱梁結(jié)構(gòu),中跨和北邊跨采用扁平鋼箱梁結(jié)構(gòu),南邊跨采用PC箱梁結(jié)構(gòu),鋼一混凝土結(jié)合段采用帶鋼格室的部分連接填充混凝土方案;斜拉索采用外纏PVF氟化膜的高強(qiáng)平行鋼絲索,除橋塔附近幾對(duì)大傾角斜拉索直接錨固在混凝土塔壁齒
2、塊上外,其余均采用鋼錨梁錨固型式。關(guān)鍵詞:荊岳長(zhǎng)江公路大橋;斜拉橋;混合梁;箱形梁;橋梁設(shè)計(jì)中圖分類號(hào):U442.5;U448.27文獻(xiàn)標(biāo)志碼:ADesignofJingyueChangjiangRiverHighwayBridgeDINGWang—xing,JIANGYou—sheng(HubeiProvincialTransportPlanningandDesignInstitute,Wuhan430051,China)Abstract:Inthelightofthenaturalenvironmentconditionsatthesite,themainbridgeofJ
3、ingyueChan鰣iangRiverHighwayBridgeisdesignedasaasymmetricsix-spanhybridgirderca—ble—stayedbridgewithdoublepylons,doublecableplanesandwithamainspan816m.Apylonofthebridgeisthedouble—columnH—shapepylon.Atthenorthpylon,thefoundationisthesepa—rateddoublecircularfoundationswhileatthesouthpylon,thef
4、oundationistheseparatedrectan-gularpilecapsplusgrouppilefoundation.Themaingirderistheseparateddoubleedgeboxgird—ersstructure.0verthecentralspanandnorthsidespan,theflatsteelboxgirdersarearrangedandoverthesouthsidespan,theprestressedconcreteboxgirderisarranged.Thesteelandcon—cretejointsections
5、nearbythepylonsemploythestee1cellularstructureconnectionsthatarefilledinwithconcrete.Thestaycablesaremadeupofhigh—strengthparallelsteelwirestrandswrappedwithPVFfluorinatedmembranes.Withtheexceptionthatseveralpairsofthestaycableshavinggreatinclinationanglesnearbythepylonsaredirectlyanchoredto
6、thesawtoothblocksinthecon—cretewallsofthepylons,therestofthecablesareanchoredbymeansofsteelanchorbeams.Keywords:JingyueChangjiangRiverHighwayBridge;cable—stayedbridge;hybridgirder;boxgirder;bridgedesign1工程概況帶。橋址位于湖北、湖南兩省交界處,北岸為湖北省荊岳長(zhǎng)江公路大橋是湖北省骨架公路網(wǎng)中隨州荊州市監(jiān)利縣白螺鎮(zhèn),南岸為湖南省岳陽市云溪區(qū)。至岳陽高速公路跨越長(zhǎng)江的控制性工程,也
7、是連接該項(xiàng)目建設(shè)總里程為5.42km,其中長(zhǎng)江公路大橋“武漢城市圈”和“長(zhǎng)株潭城市群”經(jīng)濟(jì)發(fā)展的新紐建設(shè)總長(zhǎng)度達(dá)4302.5m,由主橋、灘橋、過渡孔橋收稿日期:2011一O4—28作者簡(jiǎn)介:丁望星(1973一),男,高級(jí)工程師,1996年畢業(yè)于東南大學(xué)路橋工程專業(yè),工學(xué)學(xué)士(dwx73722@126.corn)。58橋梁建設(shè)2011年第4期和引橋組成。主橋采用主跨816m雙塔不對(duì)稱混(6)地震設(shè)防標(biāo)準(zhǔn):100年超越概率水平1O合梁斜拉橋方案,平行雙索面,跨徑組合為(100+基巖水平峰值加速度