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Experimental investigation into the influence of a keying flap on the keying behaviour of plate anchors

Experimental investigation into the influence of a keying flap on the keying behaviour of plate anchors
Experimental investigation into the influence of a keying flap on the keying behaviour of plate anchors

Plate anchors are used in deep and ultra-deep waters to anchor floating offshore structures. Once installed vertically under the seabed with the aid of a suction follower they must be rotated or "keyed" in order to mobilize full anchor capacity. A keying flap attached to the top of the anchor is commonly used, aiming at reducing the vertical translation component of the installation path during keying, although its efficiency appears to be uncertain. To quantify the performance of this keying flap and to understand its mechanism, centrifuge tests were performed on an anchor model, using Particle Image Velocimetry (PIV) to monitor the trajectory of the anchor and the behaviour of the keying flap through examination of the soil failure mechanism upon keying. Results indicated that the keying flap did not affect the anchor trajectory, except by introducing an offset to the loading.

Anchor, Centrifuge modelling, Failure mechanism, Geotechnical engineering, Keying, Soft soil
533-540
Gaudin, Christophe
fb56af7b-bc67-429c-a507-d26249fba84d
Simkin, Mark
28e1bcee-fcfc-4323-86fc-13cf882e2a62
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
O'Loughlin, Conleth D.
cd36a0df-e345-48fa-9f35-2a43f2cdda6f
Gaudin, Christophe
fb56af7b-bc67-429c-a507-d26249fba84d
Simkin, Mark
28e1bcee-fcfc-4323-86fc-13cf882e2a62
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
O'Loughlin, Conleth D.
cd36a0df-e345-48fa-9f35-2a43f2cdda6f

Gaudin, Christophe, Simkin, Mark, White, David J. and O'Loughlin, Conleth D. (2010) Experimental investigation into the influence of a keying flap on the keying behaviour of plate anchors. In Proceedings of the 20th (2010) International Offshore and Polar Engineering Conference, ISOPE-2010. vol. 2, pp. 533-540 .

Record type: Conference or Workshop Item (Paper)

Abstract

Plate anchors are used in deep and ultra-deep waters to anchor floating offshore structures. Once installed vertically under the seabed with the aid of a suction follower they must be rotated or "keyed" in order to mobilize full anchor capacity. A keying flap attached to the top of the anchor is commonly used, aiming at reducing the vertical translation component of the installation path during keying, although its efficiency appears to be uncertain. To quantify the performance of this keying flap and to understand its mechanism, centrifuge tests were performed on an anchor model, using Particle Image Velocimetry (PIV) to monitor the trajectory of the anchor and the behaviour of the keying flap through examination of the soil failure mechanism upon keying. Results indicated that the keying flap did not affect the anchor trajectory, except by introducing an offset to the loading.

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More information

Published date: 2010
Venue - Dates: 20th International Offshore and Polar Engineering Conference, Beijing, China, 2010-06-20 - 2010-06-25
Keywords: Anchor, Centrifuge modelling, Failure mechanism, Geotechnical engineering, Keying, Soft soil

Identifiers

Local EPrints ID: 419884
URI: http://eprints.soton.ac.uk/id/eprint/419884
PURE UUID: ead01389-ebb6-46ee-ad5e-90fe1ecc1653
ORCID for David J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 23 Apr 2018 16:30
Last modified: 05 Nov 2019 01:26

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Contributors

Author: Christophe Gaudin
Author: Mark Simkin
Author: David J. White ORCID iD
Author: Conleth D. O'Loughlin

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