沌口长江公路大桥主桥设计

发布时间：2018-04-02 13:07

本文选题：斜拉桥　切入点：半飘浮体系　出处：《桥梁建设》2017年04期

【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1 860MPa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。
[Abstract]:The Zhuankou Changjiang River Highway Bridge is the first two-way 8 lane highway bridge on the Yangtze River. The main bridge is a 100 275 760 275 100 m steel box girder cable-stayed bridge with two towers and two cable planes. The bridge is a semi-floating system. The main beam adopts the steel box girder with competitive section, the total width of the box girder is 46m (including wind nozzle, the roof of the steel box girder and the U rib are welded on both sides), the bridge tower adopts the diamond shape structure, The tower height is 233.7 m, the bridge tower foundation adopts the integral pile group foundation, the whole bridge has 240 cable-stayed cables, the space double cable plane fan shape arrangement, the cable body adopts 1 860MPa high strength parallel steel wire, the cable girder end uses the anchor box to anchor, Anchorage of steel anchor beam is adopted at the end of tower, solid pier is used as auxiliary pier, frame structure is formed by tie beam at the top of pier column, large diameter pile foundation with 3 m diameter of integral cap is adopted under pier column. Large size pier cap is arranged at the top of transition pier. Under the pier column, the large diameter pile foundation with 3 m diameter of separated rectangular cap is adopted.
【作者单位】：中交第二公路勘察设计研究院有限公司;中交城市投资控股有限公司;
【分类号】：U448.27

【相似文献】