Construction and installation technique of large-scale top-bearing bucket foundation for offshore wind turbine

The first offshore wind turbine with the large-scale top-bearing (LSBTB) bucket foundation has been established in Qidong sea area of Jiangsu Province. The critical technique of large-scale bucket-top-bearing bucket foundation includes construction technique, self-floating towing technique, penetration technique with adjusting of horizontal levelness, and removability technique. The prefabrication of LSBTB bucket foundation is in onshore construction base such as wharfs or dock yards; transportation of foundation is towing from the dock yard to the appointed site. The prefabrication of LSBTB bucket foundation needs about two months. And the installation of foundation needs about two hours or so on site. After the proposed technique is industrialized, the cost will be 30%-50% lower than that of existing relevant technique.