BEARING CAPACITY MODEL OF SUNCTION BUCKET FOUNDATION FOR OFFSHORE WIND TURBINE

The suction bucket foundation has the advantages of bearing capacity,easy installation,reusability and low construction costs,and is gradually used in offshore wind turbine. At present,there is no unified standard for the calculation method of bearing capacity of the suction bucket foundation. This paper is based on API and the theory of foundation bearing capacity,summarizes three different bearing capacity modes of the suction bucket foundation,and proposes a calculation formula for the bearing mode of "lid+outer frictional resistance of bucket". According to the engineering case and the finite element software PLAXIS,this theory is verified,and the optimized design scheme is proposed. The calculation results of the "resistance of tips+the outer and inner frictional resistance of bucket" and the "lid+outer frictional resistance of bucket" proposed in this paper conform to the DNV-OS-J101 standard. The proposed design scheme can reduce the material costs of the bucket foundation by up to 13%,which is obtained for engineering practice.