The University of Southampton
University of Southampton Institutional Repository

Modelling the degradation of penetration resistance during cyclic T-bar tests in a Gulf of Mexico clay

Modelling the degradation of penetration resistance during cyclic T-bar tests in a Gulf of Mexico clay
Modelling the degradation of penetration resistance during cyclic T-bar tests in a Gulf of Mexico clay

Installation and repetitive movement during the operation of a pipeline causes remolding and softening of the surrounding soil. Similar effects can occur around foundations during their operating life. The degradation of the undrained shear strength of soft clays near the seabed is a critical component of the design of subsea facilities, including pipelines and shallow foundations. This paper presents a two-stage strength degradation model based on the framework developed by Hodder et al. (2010) for repeated vertical movement of a cylindrical object (T-bar penetrometer) embedded in a soft Gulf of Mexico (GOM) clay. The model is compared with the behavior observed in four box cores sampled in the Gulf of Mexico, in which 8 cyclic T-bar penetrometer tests were performed. By varying the parameters in the strength degradation model, its applicability for GOM clay is examined, and the effects of the location of cycling within the box core and parameter variability between box cores relative to the average parameters are explored.

Gulf of Mexico clay, Numerical modelling, Offshore engineering, Shear strength degradation, T-bar penetrometer
0038-0806
Taukoor, Vashish
98daed75-2d9c-4976-ba9b-69286095229a
Wallace, Jeff F.
df6a9853-c33a-47ce-b17f-3db90aecf575
Rutherford, Cassandra J.
5aa7e2f1-e4e5-4a21-87c1-b5d2d733628d
Bernard, Bernie B.
03de31b3-c253-4954-a205-a5bfc83769fe
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Hodder, Matthew
2c7413ea-6ff3-42ec-b93c-8ac67cede77e
Taukoor, Vashish
98daed75-2d9c-4976-ba9b-69286095229a
Wallace, Jeff F.
df6a9853-c33a-47ce-b17f-3db90aecf575
Rutherford, Cassandra J.
5aa7e2f1-e4e5-4a21-87c1-b5d2d733628d
Bernard, Bernie B.
03de31b3-c253-4954-a205-a5bfc83769fe
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Hodder, Matthew
2c7413ea-6ff3-42ec-b93c-8ac67cede77e

Taukoor, Vashish, Wallace, Jeff F., Rutherford, Cassandra J., Bernard, Bernie B., White, David J. and Hodder, Matthew (2019) Modelling the degradation of penetration resistance during cyclic T-bar tests in a Gulf of Mexico clay. Soils and Foundations. (doi:10.1016/j.sandf.2019.07.001).

Record type: Article

Abstract

Installation and repetitive movement during the operation of a pipeline causes remolding and softening of the surrounding soil. Similar effects can occur around foundations during their operating life. The degradation of the undrained shear strength of soft clays near the seabed is a critical component of the design of subsea facilities, including pipelines and shallow foundations. This paper presents a two-stage strength degradation model based on the framework developed by Hodder et al. (2010) for repeated vertical movement of a cylindrical object (T-bar penetrometer) embedded in a soft Gulf of Mexico (GOM) clay. The model is compared with the behavior observed in four box cores sampled in the Gulf of Mexico, in which 8 cyclic T-bar penetrometer tests were performed. By varying the parameters in the strength degradation model, its applicability for GOM clay is examined, and the effects of the location of cycling within the box core and parameter variability between box cores relative to the average parameters are explored.

Full text not available from this repository.

More information

Accepted/In Press date: 14 July 2019
e-pub ahead of print date: 30 August 2019
Keywords: Gulf of Mexico clay, Numerical modelling, Offshore engineering, Shear strength degradation, T-bar penetrometer

Identifiers

Local EPrints ID: 436155
URI: http://eprints.soton.ac.uk/id/eprint/436155
ISSN: 0038-0806
PURE UUID: f0a5c229-1358-4a77-bb6f-2dfbe2aa3982
ORCID for David J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 29 Nov 2019 17:30
Last modified: 07 Oct 2020 02:17

Export record

Altmetrics

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.

×