国外大型预制型沉箱吊装施工的吊耳设计

针对国外大型预制沉箱吊装施工的吊耳设计问题,结合工程案例对吊耳本体强度和局部混凝土强度进行验算,并提出大型预制沉箱吊运的技术要求。基于欧美规范,对吊耳局部混凝土的受压强度、抗崩裂强度、抗拔出强度、抗侧面爆裂强度和抗剪撬强度进行验算。结果表明,吊耳本体强度和局部混凝土强度验算的结果均满足要求。沉箱壁板作为薄壁结构,吊耳局部混凝土强度应是设计的关键问题,且在吊装施工过程中应采取必要的措施来保证吊耳受力合理。

Design of lifting lug for hoisting construction of large pre-fabricate caisson in overseas projects

Aiming at the design issues of lifting lug for large pre-fabricated caisson hoisting construction,we verify the strength of lifting lug and local concrete combining with oversea marine project,and propose the technical specifications for hoisting.Based on the European and American codes,we verify the strength of local concrete including compression strength,breakout strength,pullout strength,side-face blowout strength and pry out strength.The results show that the strength of lifting lug and local concrete satisfy the requirements.The strength of local concrete is the key problem in the design of the caisson wall as a thin-walled structure.In the process of hoisting construction,necessary measures should be taken to ensure that the lifting lug bears reasonable force.