The University of Southampton
University of Southampton Institutional Repository

Elastic solutions for consolidation around seabed pipelines

Elastic solutions for consolidation around seabed pipelines
Elastic solutions for consolidation around seabed pipelines

The build-up of pipe-soil resistance that can be mobilized on a seabed pipeline, particularly in the axial direction, is affected by consolidation of the seabed beneath the pipeline after it is laid. On fine-grained soils the consolidation period may extend well beyond the laying period, and involve a significant gain in pipe-soil resistance: a process analogous to the set-up of piles driven in clay. The available level of pipe-soil resistance affects many aspects of pipeline design, such as stability on route curves and down slopes, geohazard vulnerability, lateral buckling and axial walking behaviour. This paper considers consolidation around on-bottom pipelines through a numerical study, supported by field data. The soil is modeled as an elastic material with coupled Biot consolidation. Pipe embedments of up to 0.5 diameters have been considered and the effect of soil berms adjacent to the pipe, formed of the displaced soil, has been explored. The solutions and guidance provided in this paper allow pipeline designers to estimate the 'set-up' periods over which the effective stress at the pipe-soil interface will rise in the period after laying, indicating the build-up of available axial pipe-soil resistance. The results account for the enhancement of this resistance through a 'wedging' action. The dissipation process is retarded by a factor of up to 2 if the displaced soil forms a berm that is collapsed against the pipe wall. Similar solutions for the analogous situation of consolidation ('set-up') around driven piles have existed for many years. This paper provides the equivalent design tool for on-bottom pipelines.

996-1010
Gourvenec, S. M.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
White, D. J.
a986033d-d26d-4419-a3f3-20dc54efce93
Gourvenec, S. M.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
White, D. J.
a986033d-d26d-4419-a3f3-20dc54efce93

Gourvenec, S. M. and White, D. J. (2010) Elastic solutions for consolidation around seabed pipelines. In Offshore Technology Conference 2010, OTC 2010. vol. 2, pp. 996-1010 .

Record type: Conference or Workshop Item (Paper)

Abstract

The build-up of pipe-soil resistance that can be mobilized on a seabed pipeline, particularly in the axial direction, is affected by consolidation of the seabed beneath the pipeline after it is laid. On fine-grained soils the consolidation period may extend well beyond the laying period, and involve a significant gain in pipe-soil resistance: a process analogous to the set-up of piles driven in clay. The available level of pipe-soil resistance affects many aspects of pipeline design, such as stability on route curves and down slopes, geohazard vulnerability, lateral buckling and axial walking behaviour. This paper considers consolidation around on-bottom pipelines through a numerical study, supported by field data. The soil is modeled as an elastic material with coupled Biot consolidation. Pipe embedments of up to 0.5 diameters have been considered and the effect of soil berms adjacent to the pipe, formed of the displaced soil, has been explored. The solutions and guidance provided in this paper allow pipeline designers to estimate the 'set-up' periods over which the effective stress at the pipe-soil interface will rise in the period after laying, indicating the build-up of available axial pipe-soil resistance. The results account for the enhancement of this resistance through a 'wedging' action. The dissipation process is retarded by a factor of up to 2 if the displaced soil forms a berm that is collapsed against the pipe wall. Similar solutions for the analogous situation of consolidation ('set-up') around driven piles have existed for many years. This paper provides the equivalent design tool for on-bottom pipelines.

Full text not available from this repository.

More information

Published date: 2010
Venue - Dates: Offshore Technology Conference 2010, OTC 2010, Houston, TX, United States, 2010-05-03 - 2010-05-06

Identifiers

Local EPrints ID: 414631
URI: http://eprints.soton.ac.uk/id/eprint/414631
PURE UUID: 3dc05d49-6ac0-4ca8-92cd-c06fecd230fb
ORCID for S. M. Gourvenec: ORCID iD orcid.org/0000-0002-2628-7914
ORCID for D. J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 05 Oct 2017 16:30
Last modified: 03 Dec 2019 01:26

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×