常泰长江大桥主塔沉井出坞浮运施工关键技术  

Key Undocking and Floating Construction Technology for Main Tower Open Caisson of Changtai Yangtze River Bridge

作　　者：张磊[1,2,3,4] 罗英 尹东亚 韩鹏鹏 ZHANG Lei;LUO Ying;YIN Dongya;HAN Pengpeng(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei 430040,China;CCCC Highway Bridges National Engineering Research Centre Co.,Ltd.,Beijing 100120,China;Jiangsu Provincial Transportation Engineering Construction Bureau,Nanjing,Jiangsu 210004,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [4]中交公路长大桥建设国家工程研究中心有限公司,北京100120 [5]江苏省交通工程建设局,江苏南京210004

出　　处：《施工技术（中英文）》2022年第10期92-96,共5页Construction Technology

基　　金：2019年度交通运输行业重点科技项目(2019-MS1-011)。

摘　　要：以世界上跨度最大的斜拉桥常泰长江大桥为例,介绍增压、封底和浮箱3种助浮方案,并进行方案比选。综合各助浮方案的安全性、工期、成本和施工便利性,最终采取封底助浮方案。详细阐述采用封底助浮方案的钢沉井出坞浮运施工技术,解决了钢沉井出坞、浮运过程中的技术难题。Taking Changtai Yangtze River Bridge,the world’s longest-span cable-stayed bridge as an example,three flotation assistance schemes of pressurization,closing bottom and pontoon are introduced,and the schemes are compared and selected.Taking into account the safety,construction period,cost and construction convenience of every flotation assistance scheme,the closing bottom flotation assistance scheme is finally adopted.This paper expounds in detail the construction technology of steel caisson undocking and flotation using the closing bottom flotation assistance scheme,which solves the technical problems in the process of undocking and floating of steel caisson.

关 键 词：桥梁工程 沉井 出坞浮运 助浮结构 浮运阻力 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]