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Penetration Behavior of the Footing of Jack-Up Vessel of OWTs in Thin Stiff over NC Clay

Author

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  • Shen Xie

    (State Key Laboratory of Subtropical Building Science, South China Institute of Geotechnical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China)

  • Xinggang Wang

    (Nanjing Hydraulic Research Institute (NHRI), Nanjing 210029, China)

  • Mi Zhou

    (State Key Laboratory of Subtropical Building Science, South China Institute of Geotechnical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China)

  • Deyong Wang

    (Key Laboratory of Environment Protection & Safety of Communication Foundation Engineering, CCCC, Guangzhou 510230, China)

  • Weiping Peng

    (Guangzhou Urban Planning & Design Survey Research Institute, Guangzhou 510060, China
    Guangdong Enterprise Key Laboratory for Urban Sensing, Monitoring and Early Warning, Guangzhou 510060, China)

Abstract

This study investigated the behavior of the spudcan foundation of jack-up vessels of offshore wind turbines during the undrained vertical penetration into thin stiff-over-normally consolidated clay. Large deformation finite element (LDFE) analyses were used to simulate the continuous spudcan penetration into the seabed surface. Detailed parametric analysis was performed to explore a range of normalized soil properties and layer geometry and roughness of the soil–spudcan interface. The results were validated against previously reported data. The LDFE results were consistent with those of centrifuge tests. The evolving soil-failure patterns revealed soil backflow and the trapping of stronger top-layer material beneath the spudcan. The plug shape was influenced by the top layer thickness, the strength gradient of the bottom layer, and the relative strength ratio, which also affected the penetration resistance of soils. In this study, an expression was derived to quantify the plug shape with the aim of providing a theoretical basis for the design of spudcan footings with penetration resistance suitable for thin stiff-over-soft clay.

Suggested Citation

  • Shen Xie & Xinggang Wang & Mi Zhou & Deyong Wang & Weiping Peng, 2022. "Penetration Behavior of the Footing of Jack-Up Vessel of OWTs in Thin Stiff over NC Clay," Sustainability, MDPI, vol. 14(14), pages 1-17, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:14:p:8618-:d:862567
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    References listed on IDEAS

    as
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    3. Yang Huang & Decheng Wan, 2019. "Investigation of Interference Effects Between Wind Turbine and Spar-Type Floating Platform Under Combined Wind-Wave Excitation," Sustainability, MDPI, vol. 12(1), pages 1-30, December.
    4. Esteban, Miguel & Leary, David, 2012. "Current developments and future prospects of offshore wind and ocean energy," Applied Energy, Elsevier, vol. 90(1), pages 128-136.
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