Modelling of laterally loaded screw piles with large helical plates in sand

T. A. Al-Baghdadi, M. J. Brown, J. A. Knappett, R. Ishikura

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

11 Citations (Scopus)

Abstract

Screw piles, where flanges or plates are typically located close to the pile tip, are used in onshore applications such as transmission tower foundations. This is due to their high axial capacity, ease of installation and low material use. In offshore applications, such as jacket structure foundations for deep water renewables, they would be subjected to significant lateral loads which may not suit their low bending strength, associated with the low cross-sectional area of typical screw pile cores. To overcome these limitations, screw piles may be provided with additional flanges located close to the mudline where the lateral deformations of the bending pile are highest and where they may therefore be more effective in resisting lateral loads. This paper presents results of 3D Finite Element Analysis (FEA) investigating the lateral performance of such piles as a function of flange diameter, and suggests guidance for the optimum axial position of near surface flanges. Results suggest that near surface flanges make a moderate contribution to lateral capacity but increasing pile cross-section is more efficient.

Original languageEnglish
Title of host publicationFrontiers in Offshore Geotechnics III - Proceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015
EditorsVaughan Meyer
Place of PublicationBoca Raton, Fla.
PublisherCRC Press/Balkema
Pages503-508
Number of pages6
Volume1
ISBN (Print)9781138028500
Publication statusPublished - 2015
Event3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015 - Oslo, Norway
Duration: 10 Jun 201512 Jun 2015

Conference

Conference3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015
CountryNorway
CityOslo
Period10/06/1512/06/15

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