The mechanism of steady friction between seabed pipelines and clay soils
The mechanism of steady friction between seabed pipelines and clay soils
The large-amplitude lateral soil resistance between an on-bottom pipeline and the seabed is an important design parameter in assessing pipeline behaviour during lateral thermal buckling or under the impact of a submarine slide. This paper describes a series of centrifuge model tests that shed light on the underlying behaviour during large-amplitude lateral pipe movement. It is shown that at large displacements the lateral response is governed predominantly by the passive resistance of the growing berm of soil ahead of the pipe. Using a new analysis of this growing soil berm, based on conservation of volume, the 'local' embedment of the pipe relative to the top of the idealised soil berm is defined. In this way, the normalised lateral pipe-soil resistance, H/suD, from tests encompassing a range of pipe weights and initial embedments follows a single trend line. This idealisation of the response is more consistent than the usual terminology of a pipe-soil friction factor.
Centrifuge modelling, Clays, Failure, Offshore engineering, Pipelines, Theoretical analysis
1035-1041
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Dingle, H.R.C.
50a2a278-9699-48c1-a991-65f4e1a0cb06
December 2011
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Dingle, H.R.C.
50a2a278-9699-48c1-a991-65f4e1a0cb06
White, D.J. and Dingle, H.R.C.
(2011)
The mechanism of steady friction between seabed pipelines and clay soils.
Geotechnique, 61 (12), .
(doi:10.1680/geot.8.T.036).
Abstract
The large-amplitude lateral soil resistance between an on-bottom pipeline and the seabed is an important design parameter in assessing pipeline behaviour during lateral thermal buckling or under the impact of a submarine slide. This paper describes a series of centrifuge model tests that shed light on the underlying behaviour during large-amplitude lateral pipe movement. It is shown that at large displacements the lateral response is governed predominantly by the passive resistance of the growing berm of soil ahead of the pipe. Using a new analysis of this growing soil berm, based on conservation of volume, the 'local' embedment of the pipe relative to the top of the idealised soil berm is defined. In this way, the normalised lateral pipe-soil resistance, H/suD, from tests encompassing a range of pipe weights and initial embedments follows a single trend line. This idealisation of the response is more consistent than the usual terminology of a pipe-soil friction factor.
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Published date: December 2011
Keywords:
Centrifuge modelling, Clays, Failure, Offshore engineering, Pipelines, Theoretical analysis
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Local EPrints ID: 419899
URI: http://eprints.soton.ac.uk/id/eprint/419899
ISSN: 0016-8505
PURE UUID: 7ae6f110-1071-40af-8b71-455aea7f9a2b
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Date deposited: 23 Apr 2018 16:30
Last modified: 16 Mar 2024 04:32
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Author:
H.R.C. Dingle
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