平潭海峡公铁两用大桥总体施工方案

发布时间：2019-06-18 08:22

【摘要】：平潭海峡公铁两用大桥的FPZQ-3标段全长约11.15km,包括3座通航孔桥(双塔钢桁混合梁斜拉桥)、119孔非通航孔桥(混凝土梁桥)、34孔引桥(简支钢桁结合梁桥)。针对桥位处施工条件恶劣、工程量巨大、作业时间短等特点,基础施工采用长栈桥、先平台后围堰的方案,其中栈桥全长约7.5km,通航孔桥采用打入桩、导管架及"打入桩+锚桩"3种钻孔平台方案,采用5000型旋转钻机施工大直径钻孔桩基础(直径为4.0m和4.5m),桥塔墩承台采用防撞吊箱围堰施工;通航孔桥桥塔均采用爬模施工,且爬模作业平台采用包围结构;通航孔桥采用浮吊及架梁吊机双悬臂法进行大节段钢桁梁施工;非通航孔桥的简支钢桁梁采用工厂整孔制造、浮吊整孔架设的施工方案;混凝土箱梁采用移动模架法施工。
[Abstract]:The total length of the FPZQ-3 bid section of the two-purpose bridge in the Strait of Pingtan is about 11.15km, including 3 navigation-hole bridges (double-tower steel, hybrid-beam cable-stayed bridge),119-hole non-navigable-hole bridge (concrete beam bridge), and 34-hole approach bridge (simply-supported steel-bridge-bonded beam bridge). Aiming at the characteristics of poor construction conditions at the bridge site, great engineering quantity, short working time and the like, a long trestle is adopted for the foundation construction, and the scheme of the first platform rear cofferdam is adopted, wherein the full length of the trestle is about 7.5 km, and the navigation hole bridge adopts a driving pile, a pipe frame and a "Driving pile + anchor pile" of three drilling platform schemes, The large-diameter bored pile foundation with a diameter of 4.0m and 4.5m in diameter is adopted for the construction of a 5000-type rotary drilling machine, and the bridge tower pier bearing platform is constructed by an anti-collision hanging box cofferdam; The bridge of the navigation hole adopts the double-cantilever method of the floating crane and the frame beam crane to carry out the construction of the large-section steel double-cantilever beam; the simple-supported steel corrugated beam of the non-navigation hole bridge adopts the construction scheme for manufacturing the whole hole of the factory and the whole hole of the floating crane; and the concrete box girder is constructed by adopting a moving mould frame method.
【作者单位】：中铁大桥局集团有限公司;
【基金】：中国工程院重点咨询研究项目(2016-XZ-13)~~
【分类号】：U445

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