Abstract
The tripod bucket foundation that combines three single buckets within a triangular shape, is an emerging alternative foundation solution to support offshore wind turbine in deep water. Its performance of geotechnical capacity, especially under overturning loading, is increasingly concerned by offshore engineering. This paper reports an investigation to anti-overturning capacity of tripod bucket foundations in clay, with focus on the relatively larger foundation embedment. The kinematic mechanisms of the whole foundation system are systematically examined against increasing foundation spacing, considering the influence of foundation embedment. Based on these, an efficient method to predict the anti-overturning capacity is proposed, covering a wide range of embedment, spacing and soil strength heterogeneity. Finally, some recommendations of optimization for sizing foundation are offered, with the example application demonstrated.
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