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Axial soil stiffness for deepwater pipeline walking analysis

Axial soil stiffness for deepwater pipeline walking analysis
Axial soil stiffness for deepwater pipeline walking analysis
Deepwater pipeline global walking refers to the phenomenon that a pipeline, subjected to multiple start-up/shut-in thermal and pressure cycles, gradually moves toward one direction (usually the same to the flow direction). The fundamental mechanism of walking is rather complex and is affected not only by the thermal/pressure loading and pipeline structural behavior (e.g., lateral buckling), but also by the pipeline-soil interaction (PSI) which varies both spatially and temporally. The complex nature of walking makes the prediction of pipeline walking a challenging task, and the prevention of pipeline walking, which may be unnecessary, requires significant financial budget and increased risk exposure from offshore installations. Therefore, the motivation of this paper is to offer insights into PSI to help the engineering design of pipeline walking. The objectives of the paper are to re-visit the axial soil stiffness model (characterized by the axial mobilization displacement) recommended
in the SAFEBUCK guideline and to propose a new model for the axial mobilization displacement for walking analysis. The recommended mobilization displacement is based on a simple energy method and is calibrated with a PSI analytical model, SAFEBUCK JIP model tests, in-house proprietary tests, and test results available in the literature.
Deep Foundations Institute
Chen, Jinbo
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White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Hadley, Chris
349fc92c-b59a-4ee9-a97d-02e356225990
Ouyang, Kevin
104c4c3e-a14a-4192-9bca-84e8be9465c1
Newlin, Jason
3d39f168-199e-49db-bcc4-861de8f72872
Hu, Shuang
bd90b9f9-c34f-419f-a297-6da8a38cc47b
Bruton, David
55fc55be-c245-4e3d-acd9-f0347df3dfe1
Luo, Meng
d2505338-94b9-4cd2-aa65-4d0881d0957d
Westgate, Zack
Chen, Jinbo
1457878b-5f48-4687-93c9-158f391b0e09
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Hadley, Chris
349fc92c-b59a-4ee9-a97d-02e356225990
Ouyang, Kevin
104c4c3e-a14a-4192-9bca-84e8be9465c1
Newlin, Jason
3d39f168-199e-49db-bcc4-861de8f72872
Hu, Shuang
bd90b9f9-c34f-419f-a297-6da8a38cc47b
Bruton, David
55fc55be-c245-4e3d-acd9-f0347df3dfe1
Luo, Meng
d2505338-94b9-4cd2-aa65-4d0881d0957d
Westgate, Zack

Chen, Jinbo, White, David, Hadley, Chris, Ouyang, Kevin, Newlin, Jason, Hu, Shuang, Bruton, David and Luo, Meng (2020) Axial soil stiffness for deepwater pipeline walking analysis. Westgate, Zack (ed.) In Proceedings 4th International Symposium on Frontiers in Offshore Geotechnics. vol. 1069, Deep Foundations Institute..

Record type: Conference or Workshop Item (Paper)

Abstract

Deepwater pipeline global walking refers to the phenomenon that a pipeline, subjected to multiple start-up/shut-in thermal and pressure cycles, gradually moves toward one direction (usually the same to the flow direction). The fundamental mechanism of walking is rather complex and is affected not only by the thermal/pressure loading and pipeline structural behavior (e.g., lateral buckling), but also by the pipeline-soil interaction (PSI) which varies both spatially and temporally. The complex nature of walking makes the prediction of pipeline walking a challenging task, and the prevention of pipeline walking, which may be unnecessary, requires significant financial budget and increased risk exposure from offshore installations. Therefore, the motivation of this paper is to offer insights into PSI to help the engineering design of pipeline walking. The objectives of the paper are to re-visit the axial soil stiffness model (characterized by the axial mobilization displacement) recommended
in the SAFEBUCK guideline and to propose a new model for the axial mobilization displacement for walking analysis. The recommended mobilization displacement is based on a simple energy method and is calibrated with a PSI analytical model, SAFEBUCK JIP model tests, in-house proprietary tests, and test results available in the literature.

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Published date: 16 August 2020

Identifiers

Local EPrints ID: 449456
URI: http://eprints.soton.ac.uk/id/eprint/449456
PURE UUID: a7352b90-6e3d-4f62-8f82-a8d6a1d7356c
ORCID for David White: ORCID iD orcid.org/0000-0002-2968-582X

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Date deposited: 02 Jun 2021 16:30
Last modified: 13 Dec 2021 03:25

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Contributors

Author: Jinbo Chen
Author: David White ORCID iD
Author: Chris Hadley
Author: Kevin Ouyang
Author: Jason Newlin
Author: Shuang Hu
Author: David Bruton
Author: Meng Luo
Editor: Zack Westgate

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