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Analysis of axial response of submarine pipeline to debris-flow loading

Analysis of axial response of submarine pipeline to debris-flow loading
Analysis of axial response of submarine pipeline to debris-flow loading

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.

Analysis, Axial response, Debris flow, Submarine pipelines
1090-0241
Guha, Indranil
1ba88002-5df6-4ece-a7a1-312cf699fac0
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Guha, Indranil
1ba88002-5df6-4ece-a7a1-312cf699fac0
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93

Guha, Indranil, Randolph, Mark F. and White, David J. (2021) Analysis of axial response of submarine pipeline to debris-flow loading. Journal of Geotechnical and Geoenvironmental Engineering, 147 (2), [0002446]. (doi:10.1061/(ASCE)GT.1943-5606.0002446).

Record type: Article

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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Guha_et_al_2020_AM - Accepted Manuscript
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More information

e-pub ahead of print date: 1 February 2021
Published date: 1 February 2021
Keywords: Analysis, Axial response, Debris flow, Submarine pipelines

Identifiers

Local EPrints ID: 446674
URI: http://eprints.soton.ac.uk/id/eprint/446674
ISSN: 1090-0241
PURE UUID: c36e7e6c-d7f9-4b65-afee-63f815278e87
ORCID for David J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 17 Feb 2021 17:33
Last modified: 30 Oct 2023 03:13

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Contributors

Author: Indranil Guha
Author: Mark F. Randolph
Author: David J. White ORCID iD

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