Drained breakout resistance of a pipeline on a mobile seabed

Joe G. Tom, Simon H.F. Leckie, David J. White, Scott Draper

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes a numerical study investigating the effect of sediment transport and associated changes in the local seabed profile on the drained breakout resistance of subsea pipelines. Limit analyses were conducted assessing the breakout response of a pipeline placed on a cohesionless Mohr-Coulomb material considering different seabed profiles around the pipeline. These profiles were determined from surveys of a pipeline on an erodible seabed. The parametric study shows the relative importance of various parameters describing the seabed profile geometry, including the local pipe embedment and the adjacent slope of the seabed. Significant changes in drained resistance occur due to changes in local pipeline embedment resulting from scour induced pipeline lowering and/or sedimentation. The seabed slope local to the pipeline also has a strong impact. The assumption of a flat seabed can lead to predicted seabed resistance that differs significantly from the actual value, accounting for a more natural seabed profile.

Original languageEnglish (US)
Title of host publicationPipeline and Riser Technology
PublisherAmerican Society of Mechanical Engineers(ASME)
ISBN (Electronic)9780791856529
DOIs
StatePublished - Jan 1 2015
Externally publishedYes
EventASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2015 - St. John's, Canada
Duration: May 31 2015Jun 5 2015

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume5B

Conference

ConferenceASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2015
Country/TerritoryCanada
CitySt. John's
Period5/31/156/5/15

ASJC Scopus subject areas

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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