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

TY - GEN

T1 - Modelling of laterally loaded screw piles with large helical plates in sand

AU - Al-Baghdadi, T. A.

AU - Brown, M. J.

AU - Knappett, J. A.

AU - Ishikura, R.

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84960398109

UR - https://www.routledge.com/products/9781138028487

M3 - Conference contribution

AN - SCOPUS:84960398109

SN - 9781138028500

VL - 1

SP - 503

EP - 508

BT - Frontiers in Offshore Geotechnics III - Proceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015

A2 - Meyer, Vaughan

PB - CRC Press/Balkema

CY - Boca Raton, Fla.

T2 - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015

Y2 - 10 June 2015 through 12 June 2015

ER -