As the suction bucket foundation is gradually applied, studying the bearing capacity of the suction bucket is particularly important for the safe operation of offshore wind power. This paper proposes a suction bucket foundation with added supports; the supports automatically extend outward through the middle pipe pile of the suction bucket to enhance its stability. The bearing characteristics of the proposed and traditional suction bucket foundations are compared. The deformation and instability characteristics of the enhanced bucket foundation under ultimate load are investigated by varying the support dimensions. The results show that the added supports can enhance the ultimate bearing capacity and the stability of the bucket foundation. When the support's diameter remained constant while the length of the supports increased linearly from 20 to 80 mm, the vertical and horizontal ultimate bearing capacities increased by 20-29, and 25-34, respectively. In the case of the bucket with increased support, when other parameters remained unchanged and the displacement at the top center of the bucket had increased, the rotation point will move to the center of the bottom plane of the bucket. Under the same central displacement of the bucket top, the foundation rotation point moved vertically downward relative to the bucket as the length of supports became longer. Under the sinusoidal horizontal cyclic load with an amplitude of 150 N, the traditional bucket foundation had a plastic failure, while the bucket with supports showed no plastic failure and little displacement.
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