New design methods for large diameter piles under lateral loading for offshore wind applications

Conference paper (2015)

Authors

Byron W. Byrne University of Oxford
R. McAdam University of Oxford
F. C. Schroeder Geotechnical Consulting Group
Kenneth Gavin University College Dublin
Paul Doherty University College Dublin
David Igoe University College Dublin
A. Muirwood DONG Energy Wind Power
D. Kallehave DONG Energy Wind Power
J. Skov Gretlund DONG Energy Wind Power
Harvey Burd University of Oxford
Guy T. Houlsby University of Oxford
C. M. Martin University of Oxford
L. Zdravković Imperial College London
D. M G Taborda Imperial College London
David M. Potts Imperial College London
Richard Jardine Imperial College London
M. Sideri Geotechnical Consulting Group
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Published Date

2015

Language

English

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Abstract

Offshore wind turbines are typically founded on single large diameter piles, termed monopiles. Pile diameters of between 5mand 6mare routinely used, with diameters of up to 10 m, or more, being considered for future designs. There are concerns that current design approaches, such as the p − y method, which were developed for piles with a relatively large length to diameter ratio, may not be appropriate for large diameter monopiles. A joint industry project, PISA (PIle Soil Analysis), has been established to develop new design methods for large diameter monopiles under lateral loading. The project involves three strands of work; (i) numerical modelling; (ii) development of a new design method; (iii) field testing. This paper describes the framework on which the new design method is based. Analyses conducted using the new design method are compared with methods used in current practice.