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Reliability analysis of thin- and thick-walled bucket foundations in layered soil based on numerical simulation

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Abstract

Bucket foundation has been widely acknowledged as an alternative supporting structure for offshore wind turbines for its economic and installation efficiency. To further enhance the bearing capacity on soft layered soil, a novel thick-walled bucket foundation was developed for a 3-MW offshore wind turbine according to site-specific environmental conditions. Key parameters involving bearing capacity, failure mode, and penetration resistance were obtained to verify the feasibility of the thick-walled bucket foundation, and comparisons to thin-walled bucket foundation were also made. Particularly, the grey relational analysis was conducted to study the sensitivity of the inclination of foundations to the layered soil. Results show that the thick-walled bucket foundation is more favorable to the geological conditions when the top layer is mucky soil or silt clay. That means the thick-walled bucket foundation is not only a cost-effective alternative, reducing the material cost by 15%, but also more suitable for the offshore wind development sites in the coastal regions of China where silty soils are widely distributed.

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Acknowledgements

The writers acknowledge the assistance of anonymous reviewers as well.

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Authors and Affiliations

  1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300350, China

    Hao Zhao, Qi Jiang, Peiyao Weng & Jijian Lian

  2. School of Civil Engineering, Tianjin University, Tianjin, 300072, China

    Hao Zhao, Qi Jiang, Peiyao Weng & Jijian Lian

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  1. Hao Zhao
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  2. Qi Jiang
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  3. Peiyao Weng
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  4. Jijian Lian
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Correspondence to Jijian Lian.

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Responsible Editor: Zeynal Abiddin Erguler

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Zhao, H., Jiang, Q., Weng, P. et al. Reliability analysis of thin- and thick-walled bucket foundations in layered soil based on numerical simulation. Arab J Geosci 15, 1424 (2022). https://doi.org/10.1007/s12517-022-10694-2

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