Projects per year
Abstract
Screw piles are well-suited foundations for offshore jacket structures, as they can be installed without significant underwater noise and have a large axial capacity. However, installation requirements for such large piles must be reduced to enable their installation in the field. This study combines geometry and installation optimisation to lower force and torque installation requirements. An original pile geometry, composed of a large diameter upper section connected to a smaller diameter lower section by a transition piece, was tested in a geotechnical beam centrifuge. The advancement ratio (AR), describing the relative vertical movement per pile rotation, was varied below the threshold usually recommended. The results show that a low AR reduces the pile penetration resistance and even generates some pull-in, while the torque remains almost unaffected. The torque is mainly associated with the upper section of the pile, which has a greater diameter to resist lateral loading in service. The pile capacity in tension generally increases as AR is reduced and reaches a maximum for AR=0·5, while the compressive capacity reduces. It was shown that a simplified method can be used to estimate pile capacity, providing that some AR-dependent reduction factors can be calculated or assumed.
Original language | English |
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Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Geotechnique Letters |
Volume | 12 |
Issue number | 2 |
Early online date | 10 Mar 2022 |
DOIs | |
Publication status | Published - Jun 2022 |
Event | 1st International Symposium on Screw Piles for Energy Applications - University of Dundee, Dundee, United Kingdom Duration: 27 May 2019 → 28 May 2019 |
Keywords
- Screw anchors
- Offshore energy
- Sand
- Offshore wind
- Offshore engineering
- Anchors & anchorages
- Centrifuge modelling
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology
- Earth and Planetary Sciences (miscellaneous)
Fingerprint
Dive into the research topics of 'Optimised screw pile design for offshore jacket foundations in medium-dense sand'. Together they form a unique fingerprint.Projects
- 2 Finished
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Development of Screw Anchors for Floating Marine Renewable Energy Systems Arrays Incorporating Anchor Sharing (SAFS) (Joint with University of Liege)
Brown, M. (Investigator), Cerfontaine, B. (Investigator) & Knappett, J. (Investigator)
COMMISSION OF THE EUROPEAN COMMUNITIES
1/08/17 → 31/07/19
Project: Research
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Supergen Wind Challenge 2015: Screw Piles for Wind Energy Foundation Systems (Joint with Universities of Durham and Southampton)
Brennan, A. (Investigator), Brown, M. (Investigator) & Knappett, J. (Investigator)
Engineering and Physical Sciences Research Council
26/02/16 → 25/07/19
Project: Research
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Centrifuge Modeling of the Installation Advancement Ratio Effect on the Cyclic Response of a Single-Helix Screw Pile for Floating Offshore Wind
Wang, W. (Lead / Corresponding author), Brown, M., Sharif, Y., Davidson, C. & Ciantia, M., 1 Jan 2025, In: Journal of Geotechnical and Geoenvironmental Engineering. 151, 1, 18 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile41 Downloads (Pure) -
3D numerical analysis of screw pile subjected to axial compressive and lateral load
Kumar, P. V. P., Patra, S., Haldar, S., Brown, M. J., Knappett, J. A. & Sharif, Y. U., 1 Jan 2023, Soil Dynamics, Earthquake and Computational Geotechnical Engineering : Proceedings of the Indian Geotechnical Conference 2021 Volume 5. Muthukkumaran, K., Ayothiraman, R. & Kolathayar, S. (eds.). Singapore: Springer , Vol. 5. p. 75-85 11 p. (Lecture Notes in Civil Engineering; vol. 300).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open AccessFile77 Downloads (Pure) -
Anchor geotechnics for floating offshore wind: Current technologies and future innovations
Cerfontaine, B. (Lead / Corresponding author), White, D., Kwa, K., Gourvenec, S. M., Knappett, J. A. & Brown, M. J., 1 Jul 2023, In: Ocean Engineering. 279, 20 p., 114327.Research output: Contribution to journal › Article › peer-review
Open AccessFile27 Citations (Scopus)1261 Downloads (Pure)
Student theses
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Screw piles as offshore foundations : Numerical and physical modelling
Al-Baghdadi, T. (Author), Brown, M. (Supervisor) & Knappett, J. (Supervisor), 2018Student thesis: Doctoral Thesis › Doctor of Philosophy
File
Activities
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External PhD examiner University of Western Australia, Pierre-Yves Guy Duverneuil: The response of helical anchors under offshore environmental loading
Brown, M. (Examiner)
29 May 2024Activity: Examination types › Examination
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Public Engagement Lecture: Geotechnical modelling for the advancement of offshore renewable energy application
Brown, M. (Speaker)
6 Jun 2023Activity: Talk or presentation types › Invited talk
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Public Engagement: Tayport Episcopalian Church Talk, Sea Sunday: Local Offshore Renewable Energy Investigation and Development
Brown, M. (Speaker) & Ciantia, M. (Speaker)
9 Jul 2023Activity: Talk or presentation types › Invited talk
Datasets
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University of Dundee Test Data for the EPSRC Supergen Wind Hub Grand Challenges Project: Screw Piles for Wind Energy Foundations (Grant no. EP/N006054/1)
Davidson, C. (Creator), Brown, M. (Creator), Knappett, J. (Creator) & Brennan, A. (Creator), University of Dundee, 23 Feb 2022
DOI: 10.15132/10000176, https://doi.org/10.1680/jgeot.18.P.311 and one more link, https://www.screwpilesforoffshorewind.co.uk/#:~:text=Screw%20(or%20helical)%20piles%20are,good%20tensile%20and%20compressive%20resistance. (show fewer)
Dataset
File
Press/Media
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Heerema developing Silent Foundation Concepts Technology in coordination with the University of Dundee
30/06/20
1 item of Media coverage
Press/Media: Research
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Screw anchors could enable floating deep-sea wind farms
Knappett, J., Cerfontaine, B. & Brown, M.
16/12/19
1 item of Media coverage
Press/Media: Research
Prizes
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Institution of Civil Engineers Geotechnical Research Medal 2023
Davidson, C. (Recipient), Brown, M. (Recipient), Cerfontaine, B. (Recipient), Knappett, J. (Recipient), Brennan, A. (Recipient), Al-Baghdadi, T. (Recipient), Augarde, C. (Recipient), Coombs, W. M. (Recipient), Wang, L. (Recipient), Blake, A. (Recipient), Richards, D. (Recipient) & Ball, J. D. (Recipient), 13 Oct 2023
Prize: Prize (including medals and awards)
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Institution of Civil Engineers Telford Gold Medal 2024
Cerfontaine, B. (Recipient), Brown, M. (Recipient), Knappett, J. (Recipient), Davidson, C. (Recipient), Sharif, Y. (Recipient), Huisman, M. (Recipient), Ottolini, M. (Recipient) & Ball, J. D. (Recipient), 11 Oct 2024
Prize: Prize (including medals and awards)