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

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

doi:10.3723/OSIG17.1019

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

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

Civil Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

19 Citations (Scopus)

150 Downloads (Pure)

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 language	English
Title of host publication	Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments
Subtitle of host publication	Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London
Publisher	Society for Underwater Technology
Pages	1019-1025
Number of pages	7
Volume	1-2
ISBN (Print)	9780906940570 (hbk) Volume 1, 9780906940587 (hbk) Volume 2
DOIs	https://doi.org/10.3723/OSIG17.1019
Publication status	Published - 12 Sept 2017
Event	8th Offshore Site Investigation and Geotechnics International Conference: ‘Smarter Solutions for Future Offshore Developments’ - Royal Geographical Society, London, United Kingdom Duration: 12 Sept 2017 → 14 Sept 2017 http://www.sutconnects.com/ (Link to conference website)

Conference

Conference	8th Offshore Site Investigation and Geotechnics International Conference
Country/Territory	United Kingdom
City	London
Period	12/09/17 → 14/09/17
Internet address	http://www.sutconnects.com/ (Link to conference website)

Keywords

DPA
Anchoring
dynamic
sand

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.3723/OSIG17.1019

Author Accepted ManuscriptAccepted author manuscript, 285 KB

1 Finished

GeoWAVE: Geotechnical Design Solutions for the Offshore Renewable Wave Energy Industry (joint with University of Western Australia, University College Cork, Lloyds Register EMEA and industrial partners)
Brown, M. (Investigator) & Knappett, J. (Investigator)
COMMISSION OF THE EUROPEAN COMMUNITIES
2/09/12 → 2/08/15
Project: Research

19 Citations
3 Conference contribution
1 Article

Comparison of 1g and centrifuge modelling of drag embedment anchors with subsurface wireless tracking
Sharif, Y. (Lead / Corresponding author), Brown, M., Knappett, J., Davidson, C., Bird, R. E., Coombs, W. M., Augarde, C., Carter, G., Macdonald, C. & Johnson, K., 11 Dec 2024, In: International Journal of Physical Modelling in Geotechnics. 13 p.
Research output: Contribution to journal › Article › peer-review

Open Access
File
58 Downloads (Pure)
A review of anchor technology for floating renewable energy devices and key design considerations
Knappett, J. A., Brown, M. J., Aldaikh, H., Patra, S., O’Loughlin, C. D., Chow, S. H., Gaudin, C. & Lieng, J. T., 2015, Frontiers in Offshore Geotechnics III . Meyer, V. (ed.). Leiden: CRC Press/Balkema, p. 887-892 6 p.
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Development of a scalable actuator control system for use in a geotechnical centrifuge
Patra, S., Knappett, J., Brown, M. & Aldaikh, H., 2014, Information Technology in Geo-Engineering: Proceedings of the 2nd International Conference (ICITG), Durham, UK. Toll, D. G., Zhu, H., Osman, A., Coombs, W., Li, X. & Rouainia, M. (eds.). IOS Press, p. 183-190 8 p. (Advances in soil mechanics and geotechnical engineering; vol. 3).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Membership of group

EPSRC Supergen Offshore Renewable Energy (ORE) project, Research Alignment Group (RAG) (External organisation)
Brown, M. (Member)
Oct 2018
Activity: Membership types › Membership of group

Cite this

Chow, S. H., O’Loughlin, C. D., Gaudin, C., Knappett, J. A., Brown, M. J., & 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. https://doi.org/10.3723/OSIG17.1019

Chow, S. H. ; O’Loughlin, Conleth D. ; Gaudin, Christophe et al. / An Experimental Study of the Embedment of a Dynamically Installed Anchor in Sand. 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 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 {\textquoteleft}blade-like{\textquoteright} 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.",

keywords = "DPA, Anchoring, dynamic , sand",

author = "Chow, {S. H.} and O{\textquoteright}Loughlin, {Conleth D.} and Christophe Gaudin and Knappett, {Jonathan A.} and Brown, {Michael J.} and Lieng, {Jon T.}",

year = "2017",

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doi = "10.3723/OSIG17.1019",

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booktitle = "Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments",

publisher = "Society for Underwater Technology",

note = "8th Offshore Site Investigation and Geotechnics International Conference : {\textquoteleft}Smarter Solutions for Future Offshore Developments{\textquoteright} ; Conference date: 12-09-2017 Through 14-09-2017",

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Chow, SH, O’Loughlin, CD, Gaudin, C, Knappett, JA , Brown, MJ & Lieng, JT 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, Society for Underwater Technology, pp. 1019-1025, 8th Offshore Site Investigation and Geotechnics International Conference, London, United Kingdom, 12/09/17. https://doi.org/10.3723/OSIG17.1019

An Experimental Study of the Embedment of a Dynamically Installed Anchor in Sand. / Chow, S. H.; O’Loughlin, Conleth D. ; Gaudin, Christophe et al.
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 Society for Underwater Technology, 2017. p. 1019-1025.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - An Experimental Study of the Embedment of a Dynamically Installed Anchor in Sand

AU - Chow, S. H.

AU - O’Loughlin, Conleth D.

AU - Gaudin, Christophe

AU - Knappett, Jonathan A.

AU - Brown, Michael J.

AU - Lieng, Jon T.

PY - 2017/9/12

Y1 - 2017/9/12

N2 - 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.

AB - 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.

KW - DPA

KW - Anchoring

KW - dynamic

KW - sand

U2 - 10.3723/OSIG17.1019

DO - 10.3723/OSIG17.1019

M3 - Conference contribution

SN - 9780906940570 (hbk) Volume 1

SN - 9780906940587 (hbk) Volume 2

VL - 1-2

SP - 1019

EP - 1025

BT - Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments

PB - Society for Underwater Technology

T2 - 8th Offshore Site Investigation and Geotechnics International Conference

Y2 - 12 September 2017 through 14 September 2017

ER -

Chow SH, O’Loughlin CD, Gaudin C, Knappett JA , Brown MJ, Lieng JT. 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. Society for Underwater Technology. 2017. p. 1019-1025 Epub 2017 Jan 1. doi: 10.3723/OSIG17.1019

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

Abstract

Conference

Keywords

UN SDGs

Access to Document

Fingerprint

Projects

GeoWAVE: Geotechnical Design Solutions for the Offshore Renewable Wave Energy Industry (joint with University of Western Australia, University College Cork, Lloyds Register EMEA and industrial partners)

Research output

Comparison of 1g and centrifuge modelling of drag embedment anchors with subsurface wireless tracking

A review of anchor technology for floating renewable energy devices and key design considerations

Development of a scalable actuator control system for use in a geotechnical centrifuge

Activities

EPSRC Supergen Offshore Renewable Energy (ORE) project, Research Alignment Group (RAG) (External organisation)

Cite this