Analysis of Axial Response of Submarine Pipeline to Debris-Flow Loading
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 147, Issue 2
Abstract
This technical note presents simplified parametric solutions for the axial response of surface-laid submarine pipelines subjected to axial drag from debris flows. In assessing the response of pipelines impacted by debris flow emanating from a submarine landslide, both normal and axial responses must be considered. Previous work has indicated that these can be decoupled, at least as a first-stage analysis. The most critical aspect of axial drag is the potential for the pipeline to buckle. However, to make preliminary estimates of displacements and forces along the pipeline prior to buckling, simple assumptions of elastic pipeline response with elastic perfectly plastic interaction with the seabed are justified. These allow the development of parametric solutions that contain only three nondimensional quantities. This technical note documents the solutions and illustrates their application for some typical input conditions.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work forms part of the activities of the Centre for Offshore Foundation Systems (COFS), established in 1997 under the Australian Research Council’s Special Research Centres Program, and supported (2010–2017) as a node of the Australian Research Council’s Centre of Excellence for Geotechnical Science and Engineering, and through the Fugro Chair in Geotechnics, the Lloyd’s Register Foundation Chair and Centre of Excellence in Offshore Foundations, and the Shell Chair in Offshore Engineering.
References
Guha, I. 2020. “Structural analysis of submarine pipelines under submarine slide and thermal loading.” Ph.D. thesis, Centre for Offshore Foundation Systems, Univ. of Western Australia.
Guha, I., M. F. Randolph, and D. J. White. 2016. “Evaluation of elastic stiffness parameters for pipeline-soil interaction.” J. Geotech. Geoenviron. Eng. 142 (6): 04016009. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001466.
Kvalstad, T. J., F. Nadim, and C. B. Harbitz. 2001. “Deepwater geohazards: Geotechnical concerns and solutions.” In Proc., Offshore Technology Conf. Houston: Offshore Technology Conference. https://doi.org/10.4043/12958-MS.
Randolph, M. F., D. Seo, and D. J. White. 2010. “Parametric solution of slide impact on pipelines.” J. Geotech. Geoenviron. Eng. 136 (7): 940–949. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000314.
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© 2020 American Society of Civil Engineers.
History
Received: Feb 19, 2020
Accepted: Sep 9, 2020
Published online: Dec 11, 2020
Published in print: Feb 1, 2021
Discussion open until: May 11, 2021
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