大型钢吊箱围堰整体吊装施工技术

摘要

南京长江第四大桥北塔墩钢吊箱围堰既是承台施工防水结构，也是桥墩永久防撞设施。文中对其施工环境和结构特点进行了介绍，并通过计算分析，确定了大型吊装设备的选型等，同时对双浮吊整体抬吊施工的相关环节进行了叙述，最终成功完成了钢吊箱围堰整体吊装沉放。%The north tower pier of steel box cofferdam of the fourth Nanjing Yangtze River Bridge is not only caps waterproof structure,but also permanent berthing pier.Its construction environment and structural features were introduced,and the calculation and analysis are performed to determine the selection of heavy lifting equipment,etc.In addition an important part of the relevant double floating crane overall hoisting was described in detail and the steel box cofferdam overall lifting sinking is ultimately successfully completed.