CHD pile performance, Part I: Physical modelling

John Ross Jeffrey, Michael John Brown (Lead / Corresponding author), Jonathan Adam Knappett, Jonathan David Ball, Karlis Caucis

Research output: Contribution to journalArticle

12 Citations (Scopus)
470 Downloads (Pure)


The Continuous Helical Displacement (CHD) pile is an auger displacement pile developed by Roger Bullivant Ltd in the UK. It has performance characteristics of both displacement and non-displacement piles due to the nature in which it is installed. Based on field experience, it has been shown that the load-settlement performance of the CHD installed in sand exceeds the current design predictions based upon conservative effective pile diameter and design parameters associated with auger bored or continuous flight auger (CFA) cast in-situ piles. In an effort to gain a greater understanding of the performance of the CHD pile compared with more conventional piling techniques, a programme of model pile testing and associated Finite Element Modelling (the subject of a Companion Paper) in sand was undertaken. The model testing programme established that greater shaft resistance may be developed for CHD piles than had originally been considered. Based upon the results of the model testing, recommendations for more appropriate approaches to the selection of end bearing and shaft resistance factors are made to predict ultimate load capacity in sand.
Original languageEnglish
Pages (from-to)421-435
Number of pages15
JournalProceedings of the Institution of Civil Engineers: Geotechnical Engineering
Issue number5
Early online date21 Apr 2016
Publication statusPublished - 14 Sep 2016


  • Geotechnical engineering
  • Piles and piling
  • Models (physical)

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  • Research Output

    • 12 Citations
    • 2 Conference contribution
    • 1 Comment/debate

    Screw pile research at the University of Dundee

    Brown, M., 27 May 2019, 1st International Symposium on Screw Piles for Energy Applications. Dundee: University of Dundee, p. 1-13

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

    Open Access
  • 134 Downloads (Pure)

    Discussion: CHD pile performance: Part I – Physical modelling

    Jeffrey, J. R., Brown, M. J., Knappett, J. A., Ball, J. D., Caucis, K., Cui, W., Zheng, X. D., Zhang, S. M. & Zhang, Q. Q., 1 Apr 2017, In : Proceedings of the Institution of Civil Engineers: Geotechnical Engineering. 170, 2, p. 186-187 2 p., 1600216.

    Research output: Contribution to journalComment/debate

    Open Access
    1 Citation (Scopus)
    138 Downloads (Pure)

    Understanding CHD pile performance in granular soils

    Jeffrey, J. R., Schwamb, T., Brown, M. J. & Ball, J., 2010, 11th International Conference on Piling and Deep Foundations. Deep Foundations Institute, p. 130-138 9 p.

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

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