Buried Pipelines Subject to Subgouge Deformations
Publication: International Journal of Geomechanics
Volume 7, Issue 3
Abstract
Engineers often model pipe/soil interaction events based on the concept of subgrade reactions originally proposed by Winkler. Engineering models often utilize beam and nonlinear/plastic spring elements to represent pipelines and the surrounding soil medium, respectively. The spring formulations, defining soil resistance to deformations in three-dimensional space, are usually assumed to be independent and the responses are discrete between adjacent soil zones. However, this idealization does not truly replicate a soil medium behavior. This study presents coupled numerical analyses of pipeline for the specific problem of subgouge deformations due to ice gouge events. Three dimensional continuum analyses of coupled pipe/soil/ice keel interaction using an explicit arbitrary Lagrangian finite- element approach were performed. The study compares the continuum finite-element results with Winkler-type analysis for the specific analyzed problem. A Lagrangian adaptive meshing technique was employed to model very large movement and achieves a steady-state condition; and reasonable ice/soil and soil/pipe interaction interfaces are employed. The numerical analysis shows the potential for continuum modeling of pipe/soil interaction events and develops a better understanding of ice gouging and pipe/soil/ice keel interaction.
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Acknowledgments
The writers are grateful to C-CORE for their support and computer facilities. The writers are also grateful to their colleagues and friends in C-CORE and the Memorial University of Newfoundland for allowing for an in-depth discussion of the subject, specifically Dr. Ian Jordaan and Mr. Tony King.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 7 • Issue 3 • May 2007
Pages: 206 - 216
Copyright
© 2007 ASCE.
History
Received: Dec 13, 2005
Accepted: Aug 15, 2006
Published online: May 1, 2007
Published in print: May 2007
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