An application case is presented in details, which is the first and to date only large-scale Composite Bucket Foundation (CBF) (design loads according to 3.0 MW turbine) for a fully operational wind turbine installed at the offshore test facility in Qidong City, in the eastern part of China. The diameter and the bucket skirt length of the composite bucket foundation are equal to 30 m and 7 m respectively, and the total weight of the foundation is nearly 2400 tons with an 18 m arc transition structure of prestressed concrete. The key in the force transmission between the tower and the foundation for offshore wind turbine is to transfer the large moment and horizontal loads. The foundation with self-floating characteristics could be towed to the construction site and during installation is penetrated vertically into the soil by means of suction within the bucket with jetting at the bottom of bucket skirt.
展开▼
