An Experimental Study of the Embedment of a Dynamically Installed Anchor in Sand

S. H. Chow, Conleth D. O’Loughlin, Christophe Gaudin, Jonathan Knappett, Michael Brown, Jon T. Lieng

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

Abstract

This paper presents a novel dynamically installed anchor concept suitable for sand. The anchor, referred to as the DPAIII, uses a thin ‘blade-like’ design to reduce bearing resistance during penetration, and comprises a lower plate attached to an upper removable follower. The anchor is installed through the kinetic energy it gains during free-fall in water. After embedment, the upper follower is removed leaving the lower plate an-chor vertically embedded in the sand. This paper examines the embedment potential of the DPAIII through centrifuge tests conducted at 100 g in both loose and dense sand, using a model DPA III with different fol-lower masses, impacting the model sand bed at two different velocities. The centrifuge tests show promising results, with anchor tip embedment in the range of 0.9 to 2.2 times the lower plate length. The tip embed-ment is found to be a function of the soil relative density, anchor mass and impact velocity.
Original languageEnglish
Title of host publicationOffshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments
Subtitle of host publicationProceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London
PublisherSociety for Underwater Technology
Pages1019-1025
Volume1-2
ISBN (Print)9780906940570 (hbk) Volume 1, 9780906940587 (hbk) Volume 2
Publication statusPublished - 12 Sep 2017
Event8th Offshore Site Investigation and Geotechnics International Conference: ‘Smarter Solutions for Future Offshore Developments’ - Royal Geographical Society, London, United Kingdom
Duration: 12 Sep 201714 Sep 2017
http://www.sutconnects.com/ (Link to conference website)

Conference

Conference8th Offshore Site Investigation and Geotechnics International Conference
CountryUnited Kingdom
CityLondon
Period12/09/1714/09/17
Internet address

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Keywords

  • DPA
  • Anchoring
  • dynamic
  • sand

Cite this

Chow, S. H., O’Loughlin, C. D., Gaudin, C., Knappett, J., Brown, M., & Lieng, J. T. (2017). An Experimental Study of the Embedment of a Dynamically Installed Anchor in Sand. In Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London (Vol. 1-2, pp. 1019-1025). Society for Underwater Technology.