科特迪瓦阿拉萨内·瓦塔拉大桥总体设计  

Overall Design of Alassane Ouattara Bridge in C te d′Ivoire

作　　者：关大勇 戴万江 张合清 GUAN Dayong;DAI Wanjiang;ZHANG Heqing(China Highway Engineering Consulting Group Co.,Ltd.,Beijing 100097,China)

机构地区：[1]中国公路工程咨询集团有限公司,北京100097

出　　处：《世界桥梁》2024年第6期1-7,共7页World Bridges

摘　　要：科特迪瓦阿拉萨内·瓦塔拉大桥采用(24+38+53+65+65+65+200+60+60)m九孔一联的地锚式独塔斜拉桥与连续梁桥组合体系,采用法国标准建设。大桥除C9桥台采用背索锚碇与主梁固结外,其它墩(台)均设置纵向滑动支座;主梁采用单箱三室钢-混组合梁,按超长联长设计,采用支架滑移施工,通过调整斜拉索索力、预制桥面板安装顺序和湿接缝施工顺序,减小主梁内力,确保主梁线形顺畅;因桥梁景观的需要,采用空间异形人字形桥塔,塔高108 m,采用柔性承台设计;C9桥台(锚碇)采用重力式地锚结构。施工图设计阶段,开展系列设计关键技术研究,在保证桥梁景观效果的同时,确保结构的稳定性和安全性。The Alassane Ouattara Bridge in C te d′Ivoire adopts a combination system of a ground-anchored single-pylon cable-stayed bridge and a continuous girder bridge,with nine spans of(24+38+53+65+65+65+200+60+60)m.The construction follows French standards.Except for the C9 abutment,where the anchorage of back stays is integrated with the main girder,longitudinal sliding bearings are used for all other piers and abutments.The superstructure consists of a three-cell steel box girder that acts compositely with the overlaid concrete slabs,with extra-long expansion unit.Sliding construction techniques are employed.By adjusting the cable tension,the installation sequence of prefabricated deck panels,and the casting sequence of in-situ stitches,the internal forces of the main girder are reduced,ensuring smooth alignment of the superstructure.For aesthetic purposes,the bridge pylon adopts a spatially unique A-shaped design,with a height of 108 m,supported by a flexible foundation system.The C9 abutment(anchorage)uses a gravity ground anchor structure.During the construction design phase,a series of critical technical design studies were conducted to ensure the bridge′s visual appeal while maintaining structural stability and safety.

关 键 词：斜拉桥与连续梁桥组合体系 钢-混组合梁 人字形桥塔 柔性承台 重力式地锚结构 桥梁设计 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]