特大跨径拱桥施工技术进展和创新  

The Development and Innovation of the Construction Technology in Super Large-span Arch Bridges

作　　者：荀东亮[1] 

机构地区：[1]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040

出　　处：《施工技术》2011年第9期1-4,共4页Construction Technology

基　　金：国家科技支撑计划项目(2009BAG15B02);交通行业联合科技攻关项目(2008-353-332-150)

摘　　要：简单介绍了特大跨径拱桥的发展概况,对拱桥的理论极限跨径进行了分析,总结了特大跨径拱桥的施工方法。重点介绍了近年来三座特大跨径拱桥的施工新技术:重庆朝天门长江大桥,采用拱梁起重机悬臂安装,并辅以斜拉扣挂系统和临时系杆进行施工;九堡大桥,采用专利技术———步履式顶推系统三跨连拱整体顶推;明州大桥,边跨三角区采用吊机施工,中跨采用缆索吊无支架施工,并辅以"吊扣合一"斜拉扣挂系统。它们桥型各异,其施工方法变化多样,体现了拱桥的多样性和适应性,对特大跨径拱桥的施工具有借鉴意义。The engineering situation of large-span arch bridge is introduced,the potential theoretical ultimate span of the arch bridge is analyzed,the construction method of large-span arch bridge is summarized.The author introduces the new construction technology of three large-span arch bridges.The Chaotianmen Bridge in Chongqing is the largest span arch bridge in the world.The erection of the bridge is finished by crane which is located on the arch beams,and the new cable-stayed tower system develops with rotational reams.The Jiubao Bridge in Hangzhou is the first continuous composite arch-beam bridges which was erected by incremental launching method totally in the world by using temporary piers and unique patent—walking pushing system.Mingzhou Bridge in Ningbo is a tied arch bridge with double-leg steel box section.The bridge segments in side triangle span is erected by tower crane.The segments in central span are erected by cableway without supporting brackets.In the process,the cable-stayed tower system is used.

关 键 词：拱桥 施工 分析 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U445[交通运输工程—道路与铁道工程]