Modelling Screwpile Installation Using the MPM

Lei Wang (Lead / Corresponding author), William M. Coombs, Charles E. Augarde, Michael Brown, Jonathan Knappett, Andrew Brennan, David Richards, Anthony Blake

Research output: Contribution to journalArticle

6 Citations (Scopus)
172 Downloads (Pure)

Abstract

Screwpiles are, as the name suggests, piled foundations which are screwed into the ground. They provide restraint to both upwards and downward loading directions and are commonly used for light structures subject to overturning or wind loading, such as sign gantries at the sides of motorways. An EPSRC-funded project led by University of Dundee has recently started, with Durham and Southampton as partners, in which the use of screwpiles (individual or in groups) for offshore foundations is under investigation. At Durham, a numerical modelling framework based on the material point method (MPM) is being developed for the installation phase of a screwpile. The aim is to use the model to provide an accurate representation of the in situ ground conditions once the pile is installed, as during installation the ground is disturbed and any model that "wishes in place" a screwpile may not provide representative long-term performance predictions. Following modelling of installation, the soil state will be transferred to a standard finite element package for the subsequent modelling of in-service performance (the MPM being considered unnecessary and computationally expensive for this phase of the life of a screwpile). In this preliminary work, we present the development of features of this numerical tool to simulate the screwpile installation. These features include a moving mesh concept (both translation and rotation) and interface elements. The effectiveness of the algorithm is illustrated through simple examples.

Original languageEnglish
Pages (from-to)124-132
Number of pages9
JournalProcedia Engineering
Volume175
Early online date27 Feb 2017
DOIs
Publication statusPublished - 2017

Keywords

  • Elasto-plastic interface element
  • Implicit MPM
  • Implicit stress integration
  • Moving mesh
  • Penetration problem
  • Screwpile

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  • Projects

    Research Output

    • 6 Citations
    • 4 Conference contribution
    • 2 Paper

    Finite element modelling of the uplift behaviour of screw piles in sand

    Cerfontaine, B., Brown, M., Knappett, J. & Davidson, C., 27 May 2019, Proceedings of the 1st International Symposium on Screw Piles for Energy Applications. p. 69-75

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

    Open Access
    File
  • 169 Downloads (Pure)
    Open Access
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  • 182 Downloads (Pure)
    Open Access
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  • 121 Downloads (Pure)

    Activities

    • 1 Membership of committee

    1st International Symposium on Screw Piles for Energy Applications (Event)

    Michael Brown (Chair)

    Dec 201828 May 2019

    Activity: Membership typesMembership of committee

    Press / Media

    How about Screwing Offshore Wind Piles?

    Michael Brown

    14/07/15

    1 Media contribution

    Press/Media: Research

    Prizes

    Winner ICPE Best presentation award

    Brown, Michael (Recipient), Sep 2018

    Prize: Prize (including medals and awards)

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