武汉鹦鹉洲长江大桥钢—混结合梁施工技术

发布时间：2018-04-13 09:07

本文选题：悬索桥 + 钢-混结合梁　；参考：《世界桥梁》2014年04期

【摘要】：武汉鹦鹉洲长江大桥主桥为(200+2×850+200)m的三塔四跨地锚式悬索桥,为解决桥面铺装层易破损、脱离移位的难题,主梁采用钢-混结合梁结构,其上铺装改性沥青SMA铺装层。针对该新型结构设计,钢加劲梁各单元件均提前在专业钢结构加工厂内制造成型,并采用长线法预拼;混凝土桥面板采取工厂预制施工;边跨混凝土桥面板与钢加劲梁结合采取先节段内结合,后节段间结合的二次结合施工技术;中跨混凝土桥面板与钢加劲梁结合采取先节段桥面板临时固定,后分批浇筑湿接缝混凝土的结合施工技术。实践证明,该桥采用的钢-混结合梁施工技术实际应用效果良好。
[Abstract]:The main bridge of Baozhou Yangtze River Bridge in Wuhan is a three-tower four-span ground anchor suspension bridge with 200 2 脳 850 200 m. In order to solve the problem of easy breakage and displacement of deck paving layer, the main beam adopts steel-concrete composite beam structure, which is surfaced with modified asphalt SMA pavement.In view of the new structure design, each single element of steel stiffening beam is manufactured in advance in the professional steel structure processing factory and pre-assembled by long line method, and concrete bridge deck is prefabricated in the factory.The concrete deck slab of side span and steel stiffened beam are combined with steel stiffened beam. The construction technology of the second combination of the first segment and the back section is adopted; the intermediate span concrete deck slab and the steel stiffened beam are temporarily fixed by the first section of the bridge deck, and the concrete deck slab of the middle span bridge is combined with the steel stiffened beam.Combined construction technology of post-pouring wet joint concrete.Practice shows that the construction technology of steel-concrete composite beam adopted in this bridge has good practical application effect.
【作者单位】：中铁大桥局集团桥科院有限公司;桥梁结构安全与健康湖北省重点实验室;中铁大桥局集团第六工程有限公司;
【分类号】：U445.4

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