An experimental study of the embedment of a dynamically installed anchor in sand

Shiaohuey Chow, Conleth O'Loughlin, Christophe Gaudin, Jonathan Knappett, Michael Brown, Jon Tore Lieng

Research output: Chapter in Book/Conference paperConference paper

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 anchor 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 follower 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 embedment 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
Subtitle of host publicationProceedings of the 8th International Conference
Place of PublicationLondon
PublisherSociety for Underwater Technology
Pages1019-1025
Number of pages7
Volume2
ISBN (Print)9780906940570, 9780906940587
Publication statusPublished - 2017
EventOffshore Site Investigation & Geotechnics Committee 8th International Conference: Smarter Solutions for Future Offshore Developments - Royal Geographical Society, London, United Kingdom
Duration: 12 Sep 201714 Sep 2017
https://www.sut.org/event/osig-2017-smarter-solutions-for-future-offshore-developments

Conference

ConferenceOffshore Site Investigation & Geotechnics Committee 8th International Conference
CountryUnited Kingdom
CityLondon
Period12/09/1714/09/17
Internet address

Fingerprint

anchor
experimental study
sand
centrifuge
kinetic energy
penetration
soil
water

Cite this

Chow, S., O'Loughlin, C., Gaudin, C., Knappett, J., Brown, M., & Tore Lieng, J. (2017). An experimental study of the embedment of a dynamically installed anchor in sand. In Offshore Site Investigation and Geotechnics : Proceedings of the 8th International Conference (Vol. 2, pp. 1019-1025). London: Society for Underwater Technology.
Chow, Shiaohuey ; O'Loughlin, Conleth ; Gaudin, Christophe ; Knappett, Jonathan ; Brown, Michael ; Tore Lieng, Jon . / An experimental study of the embedment of a dynamically installed anchor in sand. Offshore Site Investigation and Geotechnics : Proceedings of the 8th International Conference. Vol. 2 London : Society for Underwater Technology, 2017. pp. 1019-1025
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title = "An experimental study of the embedment of a dynamically installed anchor in sand",
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 anchor 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 follower 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 embedment is found to be a function of the soil relative density, anchor mass and impact velocity.",
author = "Shiaohuey Chow and Conleth O'Loughlin and Christophe Gaudin and Jonathan Knappett and Michael Brown and {Tore Lieng}, Jon",
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Chow, S, O'Loughlin, C, Gaudin, C, Knappett, J, Brown, M & Tore Lieng, J 2017, An experimental study of the embedment of a dynamically installed anchor in sand. in Offshore Site Investigation and Geotechnics : Proceedings of the 8th International Conference. vol. 2, Society for Underwater Technology, London, pp. 1019-1025, Offshore Site Investigation & Geotechnics Committee 8th International Conference, London, United Kingdom, 12/09/17.

An experimental study of the embedment of a dynamically installed anchor in sand. / Chow, Shiaohuey; O'Loughlin, Conleth; Gaudin, Christophe; Knappett, Jonathan; Brown, Michael; Tore Lieng, Jon .

Offshore Site Investigation and Geotechnics : Proceedings of the 8th International Conference. Vol. 2 London : Society for Underwater Technology, 2017. p. 1019-1025.

Research output: Chapter in Book/Conference paperConference paper

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Chow S, O'Loughlin C, Gaudin C, Knappett J, Brown M, Tore Lieng J. An experimental study of the embedment of a dynamically installed anchor in sand. In Offshore Site Investigation and Geotechnics : Proceedings of the 8th International Conference. Vol. 2. London: Society for Underwater Technology. 2017. p. 1019-1025