六横跨海通道双屿门大桥总体设计  

Overall Design of Shuangyumen Bridge for the Liuheng Sea-crossing Channel

作　　者：陈岱杰 胡雷挺 程德林[2] 张愉 徐源庆 CHEN Dai-jie;HU Lei-ting;CHENG De-lin;ZHANG Yu;XU Yuan-qing(Zhoushan Bridge Construction Management Center,Zhoushan 202450,China;CCCC Highway Consultants Co.Ltd.,Beijing 100010,China;CCCC Highway Bridges National Engineering Research Centre Co.Ltd.,Beijing 100120,China)

机构地区：[1]舟山市大桥建设管理中心,舟山市202450 [2]中交公路规划设计院有限公司,北京市100010 [3]中交公路长大桥建设国家工程研究中心有限公司,北京市100120

出　　处：《公路》2024年第8期210-216,共7页Highway

基　　金：浙江省交通运输厅科技计划项目,项目编号2021069。

摘　　要：双屿门大桥是宁波舟山港六横跨海大桥的关键性控制工程,其主跨为1 768 m,是世界最大跨度单跨吊钢箱梁悬索桥。该桥采用半飘浮体系,双向四车道设计。主梁为分体钢箱梁,分体箱间距为6 m。为提高强台风海域超大跨径悬索桥的抗风稳定性,钢箱梁在局部区域进行细节优化,消减了竖弯和扭转涡振。索塔采用圆形承台群桩基础,塔身为门形索塔,采用型钢劲性骨架组合结构塔柱及整体式安装的型钢劲性骨架组合结构横梁,以缓解关键节点的受力,减少钢筋的使用,简化现场操作工序,加快施工进度。锚碇结合地形分别设计重力锚与隧道锚,基础均以中风化熔结凝灰岩为持力层。经验算,各构件的计算结果均满足规范要求。The Shuangyumen Bridge,a key control project of the Liuheng Sea-crossing Channel in Zhoushan Port of Ningbo,is the largest single span suspended steel box girder suspension bridge with a main span of 1 768 m in the world.The bridge is designed as a semi-floating system structure,with dual 2-lanes carriageway.The main beam is split steel box girder,with 6 m spacing between the split boxes.In order to improve the wind resistance stability of super long-span suspension bridges in strong typhoon waters,the steel box girder is optimized in local areas to reduce vertical bending and torsional vortex vibration.The cable tower adopts a circular bearing platform group pile foundation and a portal type cable tower.The cable tower adopts a steel reinforced skeleton composite structure with tower columns and an integrally installed steel reinforced skeleton composite structure beam,alleviating the stress on key nodes,reducing the use of steel bars,simplifying on-site operation procedures,and accelerating construction progress.The gravity anchors and tunnel anchors is designed separately based on the terrain of the anchorage.The foundation is made of moderately weathered fused tuff as the bearing layer.After checking and verification,the calculation results of each component meet the requirements of the specifications.

关 键 词：桥梁工程 双屿门大桥 型钢混凝土 组合索塔 分体钢箱梁 隧道锚 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]