Sensitivity Analysis of Factors Affecting the Bearing Capacity of Suction Bucket Foundation in Soft Clay

Bin Wang, Ming-Hui Yuan, Liang Li, Chang-Feng Yuan, Ying Li and Kan-Min Shen
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Bin Wang: Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province, Hangzhou 311122, China
Ming-Hui Yuan: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Liang Li: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Chang-Feng Yuan: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Ying Li: Chinese–German Institute of Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
Kan-Min Shen: Powerchina Huadong Engineering Corporation Limited, Hangzhou 311122, China

Sustainability, 2022, vol. 14, issue 15, 1-14

Abstract: A suction bucket is the foundation for the development of offshore wind power technology in the deep sea, and its stability is crucial to the superstructure of the wind power generation system. Combined with soft clay soil strata along the Chinese coast, the bearing capacity of suction bucket foundations was studied using a numerical model. Sensitivity factors such as soil strength with random space distribution, dimensions of foundation, wind and wave loads in different directions, and cycle times were considered. The results show that the normalized foundation bearing capacity coefficient increases with the increase of the foundation length–diameter ratio. When the foundation length–diameter ratio is less than 1.0, the foundation bearing capacity coefficient is more sensitive to the soil non-uniformity coefficient than the length–diameter ratio. When the length–diameter ratio of the suction bucket is large enough, the influence of the soil non-uniformity coefficient on the bearing capacity of the suction bucket foundation gradually diminishes. When the direction of wind and wave loads is 15°, the bearing capacity of the suction bucket foundation is the weakest. Under the cyclic loads, the shallow soil strength weakens faster in the initial stage and the attenuation rate of soil strength slows down in the latter stage.

Keywords: soft clay; offshore wind power; suction bucket; bearing capacity; sensitivity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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