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1、橋梁建設(shè)2017年第47卷第4期(總第245期)90BridgeConstruction,Vol.47,No.4,2017(TotallyNo.245)文章編號(hào):1003-4722(2017)04-0090-06重慶東水門長(zhǎng)江大橋設(shè)計(jì)關(guān)鍵技術(shù)耿波,王福敏,魏思斯(招商局重慶交通科研設(shè)計(jì)院有限公司,重慶,400067)摘要:重慶東水門長(zhǎng)江大橋主橋?yàn)殡p塔單索面公軌兩用半飄浮體系部分斜拉橋,跨徑布置為(222.5+445+190.5)m。橋塔采用天梭造型。主梁采用2片桁雙層橋面鋼桁梁型式,橋面采用板桁組合體系。斜拉索采用單索面稀索體系,每根斜拉索由139
2、束平行鋼絞線組成,最大索力15000kN。索梁錨固采用在鋼橫梁中點(diǎn)位置設(shè)置大型鋼錨箱的型式;索塔錨固采用外置式鋼錨箱型式,鋼錨箱通過(guò)剪力釘與分離式塔肢進(jìn)行連接,索力由剪力釘、錨箱側(cè)拉板和摩擦力共同承擔(dān)。開(kāi)發(fā)了用于超大噸位鋼絞線斜拉索整體張拉的調(diào)索設(shè)備。開(kāi)展板桁組合式橋面板的傳力機(jī)理理論及試驗(yàn)、超大噸位鋼絞線斜拉索的疲勞試驗(yàn)、索塔錨固區(qū)足尺模型試驗(yàn)等相關(guān)研究,驗(yàn)證了結(jié)構(gòu)的安全性和合理性。關(guān)鍵詞:公軌兩用橋;部分斜拉橋;鋼桁梁;板桁組合橋面;外置式鋼錨箱;橋梁設(shè)計(jì)中圖分類號(hào):U448.12;U448.27文獻(xiàn)標(biāo)志碼:AKeyTechniquesofDe
3、signofDongshuimenChangjiangRiverBridgeinChongqingGENGBo,WANGFumin,WEISisi‐‐(ChinaMerchantsChongqingTransportResearch&DesignInstituteCo.,Ltd.,Chongqing400067,China)Abstract:ThemainbridgeoftheDongshuimenChangjiangRiverBridgeinChongqingisasemi‐floatingsystemroad‐cum‐lightrailextr
4、adosedbridgewithdoublepylons,singlecableplaneandwithspanarrangement(222.5+445+190.5)m.Thepylonsofthebridgearedesignedintotheshuttleshape.Themaingirderisthedouble‐decksteeltrussgirderstructurecomprisedoftwomaintrussesandthedecksaretheorthotropicplateandtrusscompositesystems.The
5、staycablesarethesparsecablesystemarrangedinthesinglecableplane.Astaycablehas139nos.ofthepar‐allelsteelwirestrandsandthemaximumforceofthecablesofthewholebridgeis15000kN.Theanchoragesforthecablesatthemaingirderarethelargesizesteelanchorboxesarrangedatthemiddlepointsofthesteelcro
6、ssbeamswhilethoseonthepylonsaretheexternalsteelanchorbo‐xes.Theexternalsteelanchorboxesareconnectedwiththeseparatedpylonlegs,usingtheshearstudsandthecableforcesarebornejointlybytheshearstuds,lateraltensileplatesoftheanchorboxesandfrictionalforces.Fortheconstructionofthebridge,
7、akindofthestaycableadjustinge‐quipmentspeciallyintendedfortheintegrallytensioningoftheveryheavyloadcablesisdeveloped,therelevantresearches,suchasthetheoriesandtestsfortheloadtransferringmechanismoftheorthotropicplateandtrusscompositedecksystems,thefatiguetestsfortheheavyloadca
8、blesandthefull‐scalemodeltestsfortheanchoragezonesinthepylons