大型沉箱起重船大吊力助浮出运技术

针对传统预制场斜坡式下水滑道末端水深不足无法满足大型沉箱下水出运的问题,研究了起重船大吊力助浮沉箱出运技术,采用理论计算与物模试验相结合的方法对沉箱吊点设置、大型钢结构吊架系统、助浮吊力与沉箱吃水和定倾高度的相关关系等进行了详细分析,提出一套全新的适用于斜坡式下水滑道沉箱出运助浮吊装系统,并成功应用于大连港大窑湾北岸配套码头工程。为现有斜坡式下水滑道预制场大吃水沉箱出运提供了成熟可靠的解决方案。

Launching and transportation technology of large caisson assisted by crane ship with large lifting force

In view of the problem that the water depth at the end of the slope type launching chute in the traditional prefabrication yard is not sufficient to meet the launching and transportation of large caissons,the research on the launching technology of the caisson assisted by the large lifting force of the crane vessel is carried out.The method combining theoretical calculation with physical model test is adopted to carry out the relevant relations among the caisson lifting point setting,the large steel structure hanger system,correlation between the buoyancy supporting lifting force and the caisson draft and the fixed tilt height,etc.After detailed analysis,a new hoisting system for caissons transportation on the slope type launching way is put forward,which has been successfully applied to the supporting wharf project on the north bank of Dayaowan in Dalian Port,providing a mature and reliable solution for large draft caissons transportation on the existing slope type launching way prefabrication yard.