Screw pile design optimisation under tension in sand

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Many applications in offshore engineering, such as floating or jacket-founded wind turbines or wave energy converters, require a significant uplift capacity of their foundations to be kept in place. Straight-shafted or suction piles in sands have a limited uplift capacity as they resist by friction only. In contrast, screw piles or screw anchors are a promising solution which provides a similar capacity to plate anchors and does not generate disturbance for marine mammals (e.g. from pile driving operations). The optimisation of the screw pile design does not rely only on the geotechnical assessment of the uplift capacity based on soil strength, but also on operational (installation requirements) and structural (helix bending, core section stress, limiting steel plate thick-ness) constraints. This paper develops a methodology for the design optimisation of screw piles under pure ten-sion in sand, incorporating all of these constraints, based on simplified analytical or semi-analytical approaches. The results show that the uplift capacity provided by an optimised screw pile is able to meet the needs of the offshore industry, across a range of soil densities and different applications (jacket foundation pile or tension leg platform anchor), providing that adequate installation plant could be deve
Original languageEnglish
Title of host publicationProceedings of the XVII ECSMGE-2019
PublisherIcelandic Geotechnical Society
Number of pages8
ISBN (Electronic)9789935943613
DOIs
Publication statusPublished - Sep 2019
Event17th European Conference on soil Mechanics and Geotechnical Engineering (ECSMGE 2019) - Reykjavik, Reykjavik, Iceland
Duration: 1 Sep 20196 Sep 2019
https://www.ecsmge-2019.com/

Conference

Conference17th European Conference on soil Mechanics and Geotechnical Engineering (ECSMGE 2019)
CountryIceland
CityReykjavik
Period1/09/196/09/19
Internet address

Keywords

  • Screw piles
  • Renewable energy
  • Offshore

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  • Projects

    Research Output

    A Finite Element approach for determining the full load-displacement relationship of axially-loaded shallow screw anchors, incorporating installation effects

    Cerfontaine, B., Knappett, J., Brown, M., Davidson, C., Al-Baghdadi, T., Sharif, Y., Brennan, A., Augarde, C., Coombs, W. M., Wang, L., Blake, A., Richards, D. J. & Ball, J. D., 30 Jun 2020, In : Canadian Geotechnical Journal.

    Research output: Contribution to journalArticle

    Open Access
    File
  • 27 Downloads (Pure)

    Optimisation of screw anchor lateral capacity in sand for offshore renewable energy applications

    Cerfontaine, B., Brown, M., Knappett, J., Davidson, C. & Sharif, Y., Sep 2020, Proceedings of the 4th International Symposium on Frontiers in Offshore Geotechnics. Deep Foundations Institute, 3451

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Open Access
    File
  • Activities

    IIT Bhubaneswar

    Michael Brown (Visiting lecturer), Jonathan Knappett (Visiting lecturer), Shantanu Patra (Visiting researcher) & Sumanta Haldar (Visiting researcher)

    1 Mar 20191 Mar 2021

    Activity: Visiting an external institution typesVisiting an external academic institution

    Science is Wonderful

    Benjamin Cerfontaine (Member) & Yaseen Sharif (Member)

    25 Sep 201926 Sep 2019

    Activity: Other activity typesPublic engagement and outreach - festival/exhibition

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