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Durham Research Online
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Centrifuge modelling of screw piles for offshore wind energy foundations.

Davidson, C. and Al-Baghdadi, T. and Brown, M.J. and Knappett, J. and Brennan, A. and Augarde, C.E. and Wang, L. and Coombs, W.M. and Richards, D. and Blake, A. and Ball, J. (2018) 'Centrifuge modelling of screw piles for offshore wind energy foundations.', in Physical modelling in geotechnics : proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. Volume 1. Boca Raton: CRC Press, pp. 695-700.

Abstract

Screw piles (helical piles) can provide a viable, cost-effective and low-noise installation alternative to increasing the size of existing foundation solutions (e.g. monopiles) to meet the demand for the advancement of offshore wind energy into deeper water. Significant upscaling of widely used onshore screw pile geometries will be required to meet the loading conditions of a jacket supported offshore wind turbine. This increase in size will lead to greater installation force and torque. This paper presents preliminary results from centrifuge tests investigating the requirements to install screw piles designed for an offshore wind energy application using specially developed equipment. Results indicate that the equipment is suitable to investigate these screw pile requirements and that significant force is required for such upscaled screw piles, with 19 MN vertical force and 7 MNm torque for the standard design. Optimisation of the screw pile geometry, reduced these forces by 29 and 11% for the vertical and rotational forces respectively.

Item Type:Book chapter
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://www.routledge.com/9781138344198
Publisher statement:This is an Accepted Manuscript of a book chapter published by Routledge in Physical modelling in geotechnics: Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. Volume 1 on 03 July 2018, available online: http://www.routledge.com/9781138344198
Date accepted:No date available
Date deposited:27 July 2018
Date of first online publication:03 July 2018
Date first made open access:03 July 2019

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