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A modified CPT based installation torque prediction for large screw piles in sand

Davidson, C.; Al-Baghdadi, T.; Brown, M.J.; Knappett, J.; Brennan, A.; Augarde, C.E.; Coombs, W.M.; Wang, L.; Richards, D.; Blake, A.; Ball, J.

A modified CPT based installation torque prediction for large screw piles in sand Thumbnail


Authors

C. Davidson

T. Al-Baghdadi

M.J. Brown

J. Knappett

A. Brennan

L. Wang

D. Richards

A. Blake

J. Ball



Contributors

Michael A. Hicks
Editor

Federico Pisanò
Editor

Joek Peuchen
Editor

Abstract

Screw piles have been suggested as an alternative foundation solution to straight-shafted piles for jacket supported offshore wind turbines in deep water. The significant environmental loads in the marine environment will require substantially larger screw piles than those currently employed in onshore applications. This raises questions over the suitability of current design methods for capacity and installation torque. This paper aims to address this issue by presenting a screw pile installation torque prediction method based on cone resistance values from Cone Penetration Test (CPT) data. The proposed method, developed using centrifuge modelling techniques in dry sand, provides accurate predictions of installation torque for both centrifuge and field scale screw piles. Furthermore, unlike existing CPT-torque correlations, the proposed method is shown to be applicable to multi-helix screw piles.

Citation

Davidson, C., Al-Baghdadi, T., Brown, M., Knappett, J., Brennan, A., Augarde, C., …Ball, J. (2018). A modified CPT based installation torque prediction for large screw piles in sand. In M. A. Hicks, F. Pisanò, & J. Peuchen (Eds.), Cone Penetration Testing IV 2018 : proceedings of the 4th International Symposium on Cone Penetration Testing (CPT'18), 21-22 June, 2018, Delft, The Netherlands (255-261). https://doi.org/10.1201/9780429505980

Presentation Conference Type Conference Paper (Published)
Conference Name Cone Penetration Testing 2018
Start Date Jun 21, 2018
End Date Jun 22, 2018
Online Publication Date Jun 13, 2018
Publication Date Jun 13, 2018
Deposit Date Jun 18, 2018
Publicly Available Date Jun 18, 2018
Pages 255-261
Book Title Cone Penetration Testing IV 2018 : proceedings of the 4th International Symposium on Cone Penetration Testing (CPT'18), 21-22 June, 2018, Delft, The Netherlands.
ISBN 9780429505980
DOI https://doi.org/10.1201/9780429505980
Public URL https://durham-repository.worktribe.com/output/1144463

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