Assessment of the consolidated breakout response of partially embedded subsea pipelines
Assessment of the consolidated breakout response of partially embedded subsea pipelines
The changing soil strength due to consolidation around a subsea pipeline can alter the lateral breakout resistance. Results of elasto-plastic coupled consolidation finite-element analyses are presented that quantify the effect of consolidation on the undrained breakout resistance and trajectory of partially embedded seabed pipelines. Breakout resistance is presented in terms of failure envelopes in vertical-horizontal load space, which also allow the trajectory of the pipe during breakout to be determined by normality. Observed responses for consolidated undrained breakout are described by simple algebraic expressions as a function of initial pipe embedment, pipe self-weight (and consequent consolidation pressure) and breakout load path. Consolidation and the associated enhancement of the shear strength of the surrounding soil can have a significant effect on the breakout response. The assumption in current practice of unconsolidated undrained soil behaviour may lead to underestimation of pipeline breakout resistance and inaccurate prediction of the trajectory of the pipe during breakout.
Clays, Consolidation, Finite-element modelling, Offshore engineering, Pipelines
391-399
Chatterjee, S.
0fdc4643-ca7d-42a3-9ea9-2c95047b8fbb
Gourvenec, S.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
White, D. J.
a986033d-d26d-4419-a3f3-20dc54efce93
April 2014
Chatterjee, S.
0fdc4643-ca7d-42a3-9ea9-2c95047b8fbb
Gourvenec, S.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
White, D. J.
a986033d-d26d-4419-a3f3-20dc54efce93
Chatterjee, S., Gourvenec, S. and White, D. J.
(2014)
Assessment of the consolidated breakout response of partially embedded subsea pipelines.
Geotechnique, 64 (5), .
(doi:10.1680/geot.13.P.215).
Abstract
The changing soil strength due to consolidation around a subsea pipeline can alter the lateral breakout resistance. Results of elasto-plastic coupled consolidation finite-element analyses are presented that quantify the effect of consolidation on the undrained breakout resistance and trajectory of partially embedded seabed pipelines. Breakout resistance is presented in terms of failure envelopes in vertical-horizontal load space, which also allow the trajectory of the pipe during breakout to be determined by normality. Observed responses for consolidated undrained breakout are described by simple algebraic expressions as a function of initial pipe embedment, pipe self-weight (and consequent consolidation pressure) and breakout load path. Consolidation and the associated enhancement of the shear strength of the surrounding soil can have a significant effect on the breakout response. The assumption in current practice of unconsolidated undrained soil behaviour may lead to underestimation of pipeline breakout resistance and inaccurate prediction of the trajectory of the pipe during breakout.
Text
2014 Geotechnique 64_5_391-399 Chatterjee et al.
- Accepted Manuscript
More information
Accepted/In Press date: 10 March 2014
e-pub ahead of print date: 22 April 2014
Published date: April 2014
Keywords:
Clays, Consolidation, Finite-element modelling, Offshore engineering, Pipelines
Identifiers
Local EPrints ID: 414530
URI: http://eprints.soton.ac.uk/id/eprint/414530
ISSN: 0016-8505
PURE UUID: 3faa2009-b9bc-41f0-a923-de57df7a4e54
Catalogue record
Date deposited: 03 Oct 2017 16:31
Last modified: 16 Mar 2024 04:31
Export record
Altmetrics
Contributors
Author:
S. Chatterjee
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
