Exploring the bifurcation between sedimentation versus scour onset below pipelines in unidirectional currents
Exploring the bifurcation between sedimentation versus scour onset below pipelines in unidirectional currents
The onset of tunnel scour beneath offshore pipelines has been previously documented to result from a phenomenon known as piping, in which the hydrodynamic pressure difference across a pipeline causes a sufficient pressure gradient within the soil under the pipe to result in floatation or suspension of downstream sediment particles. The change in propensity for onset of tunnel scour due to sedimentation around the pipe has also been previously noted. This paper explores the potential for predicting the cumulative sedimentation around a pipeline in unidirectional currents using a more fundamental approach than has previously been described in the literature. The results of this approach are compared to model pipeline experiments to see how well the predictions explain the observed changes in sedimentation and the associated effects of sedimentation on the potential for tunnel scour.
201-211
Griffiths, T.
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Draper, S.
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Sun, W.
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White, D.
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Cheng, L.
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An, H.
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2016
Griffiths, T.
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Draper, S.
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Sun, W.
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White, D.
a986033d-d26d-4419-a3f3-20dc54efce93
Cheng, L.
0ce99dcc-f682-4ec6-97aa-59fd87174385
An, H.
7268aa4f-4ba9-497c-bd05-cfe591093a05
Griffiths, T., Draper, S., Sun, W., White, D., Cheng, L. and An, H.
(2016)
Exploring the bifurcation between sedimentation versus scour onset below pipelines in unidirectional currents.
Harris, John, Whitehouse, Richard and Moxon, Sarah
(eds.)
In Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion, ICSE 2016.
CRC Press / Balkema.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
The onset of tunnel scour beneath offshore pipelines has been previously documented to result from a phenomenon known as piping, in which the hydrodynamic pressure difference across a pipeline causes a sufficient pressure gradient within the soil under the pipe to result in floatation or suspension of downstream sediment particles. The change in propensity for onset of tunnel scour due to sedimentation around the pipe has also been previously noted. This paper explores the potential for predicting the cumulative sedimentation around a pipeline in unidirectional currents using a more fundamental approach than has previously been described in the literature. The results of this approach are compared to model pipeline experiments to see how well the predictions explain the observed changes in sedimentation and the associated effects of sedimentation on the potential for tunnel scour.
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Published date: 2016
Venue - Dates:
8th International Conference on Scour and Erosion, ICSE 2016, , Oxford, United Kingdom, 2016-09-11 - 2016-09-14
Identifiers
Local EPrints ID: 419395
URI: http://eprints.soton.ac.uk/id/eprint/419395
PURE UUID: a4395c12-5ac1-4ad7-97f0-dce923f34e75
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Date deposited: 11 Apr 2018 16:30
Last modified: 10 Jan 2022 03:11
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Contributors
Author:
T. Griffiths
Author:
S. Draper
Author:
W. Sun
Author:
L. Cheng
Author:
H. An
Editor:
John Harris
Editor:
Richard Whitehouse
Editor:
Sarah Moxon
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