超大型双壁钢套箱围堰整节段吊装施工关键技术  

Key Construction Technologies of Lifting Whole Section of Super⁃large Double⁃wall Steel Box Cofferdam

作　　者：汤世才 邹端 姚森[3] TANG Shicai;ZOU Duan;YAO Sen(Tongling City Comprehensive Transportation Investment Group Co.Ltd.,Tongling Anhui 244002,China;China Railway Bridge Group Fourth Engineering Co.Ltd.,Nanjing 210031,China;China Railway Bridge Group Co.Ltd.,Wuhan 430050,China)

机构地区：[1]铜陵市综合交通投资集团有限公司,安徽铜陵244002 [2]中铁大桥局集团第四工程有限公司,南京210031 [3]中铁大桥局集团有限公司,武汉430050

出　　处：《铁道建筑》2024年第9期92-96,共5页Railway Engineering

摘　　要：新建G3铜陵长江公铁两用大桥主跨为988 m的斜拉-悬索协作体系桥梁,主桥3#墩采用整体式圆端哑铃型承台、群桩基础。围堰采用竖向分节制作、整节段运输、现场双浮吊整节段吊装施工工艺。通过将双浮吊由常规的并行站位调整为正交站位,解决了浮吊在长江高水位、快流速、窄航道、忙航运下的抛锚定位难题,降低了吊装风险;同时辅以缜密的竖向分节,使首节围堰在自浮稳定后,围堰后续节段以“蒸笼”方式一节节接高,从而将超大型双壁钢套箱围堰在长江洪汛期间以最短的时间、最省的材料和最安全的方式拼装完成。The new G3 bridge over the Yangtze River in Tongling,Jiangxi Province,China,is a 988 m cable-stayed suspension hybrid bridge for both road and rail traffic.The main bridge Pillar 3#has a monolithic circular end-bell-shaped foundation made of concrete.The foundation is supported by a group of piles.The construction team used a double-floating crane system to transport and install the foundation segments vertically.By adjusting the position of the double-floating cranes from parallel to perpendicular,the team solved the problem of anchoring the cranes in the Yangtze River during high water levels,fast currents,narrow waterways and busy shipping traffic.This reduced the risk of accidents during the installation process.Additionally,the team used a meticulous vertical segmentation to ensure that the first segment of the foundation became self-floating and stable before the subsequent segments were added,creating a“steamer”effect where the super-large double-walled steel casing was assembled in the Yangtze River during the flood season using the least amount of time,material and in the safest manner.

关 键 词：公铁两用桥梁 斜拉-悬索协作体系 双壁钢套箱围堰 整节段吊装 长江汛期 自浮稳定 

分 类 号：U445.467[建筑科学—桥梁与隧道工程]