Lateral Breakout Resistance of Shallowly Embedded Offshore Pipelines

Y. S. LEE; C. C. SMITH; C. Y. CHEUK

doi:10.1016/j.proeng.2011.07.212

Lateral Breakout Resistance of Shallowly Embedded Offshore Pipelines

Y. S. LEE^*, C. C. SMITH, C. Y. CHEUK

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

2 Citations (Scopus)

10 Downloads (CityUHK Scholars)

Abstract

Stresses induced by thermal expansion of unburied seabed pipelines can be designed to be relieved through controlled lateral buckling, which requires accurate and reliable assessment of the lateral breakout resistance. The lateral breakout resistance is strongly dependent on the pipe embedment, soil strength and loading history of the pipe. In addition, prediction of the pipe movement during the breakout process is essential as it subsequently determines the lateral resistance at large displacement. Theoretical solutions based on plasticity theory are available for combined vertical and horizontal loading on partially embedded pipes. These solutions however ignore the pre-failure pipe displacement and the associated change in soil geometry which could have significant influence on the failure load.

A series of 1g model tests has been conducted to examine the lateral breakout resistance for a shallowly embedded pipe in a soft clay. Two types of tests, (1) sideswipe tests and (2) probe tests, were conducted to examine the effect of pipe embedments and loading history on the breakout resistance of a partially embedded pipeline. Results were compared with other proposed predictions in order to provide a more rigorous basis for the prediction of the breakout resistance of a partially embedded pipeline.

Original language	English
Title of host publication	The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12
Editors	Heung Fai LAM
Publisher	Elsevier B.V.
Pages	1690-1695
DOIs	https://doi.org/10.1016/j.proeng.2011.07.212
Publication status	Published - Jan 2011
Event	12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC12) - , Hong Kong Duration: 26 Jan 2011 → 28 Jan 2011

Publication series

Name	Procedia Engineering
Publisher	ELSEVIER SCIENCE BV
Volume	14
ISSN (Print)	1877-7058

Conference

Conference	12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC12)
Country/Territory	Hong Kong
Period	26/01/11 → 28/01/11

Research Keywords

lateral breakout resistance
shallowly embedded pipe
soft clay

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This full text is made available under CC-BY-NC-ND 3.0. https://creativecommons.org/licenses/by-nc-nd/3.0/

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10.1016/j.proeng.2011.07.212

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@inproceedings{7a5c033ce76548d7acf60b8e22a357b5,

title = "Lateral Breakout Resistance of Shallowly Embedded Offshore Pipelines",

abstract = "Stresses induced by thermal expansion of unburied seabed pipelines can be designed to be relieved through controlled lateral buckling, which requires accurate and reliable assessment of the lateral breakout resistance. The lateral breakout resistance is strongly dependent on the pipe embedment, soil strength and loading history of the pipe. In addition, prediction of the pipe movement during the breakout process is essential as it subsequently determines the lateral resistance at large displacement. Theoretical solutions based on plasticity theory are available for combined vertical and horizontal loading on partially embedded pipes. These solutions however ignore the pre-failure pipe displacement and the associated change in soil geometry which could have significant influence on the failure load.A series of 1g model tests has been conducted to examine the lateral breakout resistance for a shallowly embedded pipe in a soft clay. Two types of tests, (1) sideswipe tests and (2) probe tests, were conducted to examine the effect of pipe embedments and loading history on the breakout resistance of a partially embedded pipeline. Results were compared with other proposed predictions in order to provide a more rigorous basis for the prediction of the breakout resistance of a partially embedded pipeline.",

keywords = "lateral breakout resistance, shallowly embedded pipe, soft clay",

author = "LEE, {Y. S.} and SMITH, {C. C.} and CHEUK, {C. Y.}",

year = "2011",

month = jan,

doi = "10.1016/j.proeng.2011.07.212",

language = "English",

series = "Procedia Engineering",

publisher = "Elsevier B.V.",

pages = "1690--1695",

editor = "LAM, {Heung Fai}",

booktitle = "The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12",

note = "12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC12) ; Conference date: 26-01-2011 Through 28-01-2011",

}

LEE, YS, SMITH, CC & CHEUK, CY 2011, Lateral Breakout Resistance of Shallowly Embedded Offshore Pipelines. in HF LAM (ed.), The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12. Procedia Engineering, vol. 14, Elsevier B.V., pp. 1690-1695, 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC12), Hong Kong, 26/01/11. https://doi.org/10.1016/j.proeng.2011.07.212

Lateral Breakout Resistance of Shallowly Embedded Offshore Pipelines. / LEE, Y. S.; SMITH, C. C.; CHEUK, C. Y.
The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12. ed. / Heung Fai LAM. Elsevier B.V., 2011. p. 1690-1695 (Procedia Engineering; Vol. 14).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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N2 - Stresses induced by thermal expansion of unburied seabed pipelines can be designed to be relieved through controlled lateral buckling, which requires accurate and reliable assessment of the lateral breakout resistance. The lateral breakout resistance is strongly dependent on the pipe embedment, soil strength and loading history of the pipe. In addition, prediction of the pipe movement during the breakout process is essential as it subsequently determines the lateral resistance at large displacement. Theoretical solutions based on plasticity theory are available for combined vertical and horizontal loading on partially embedded pipes. These solutions however ignore the pre-failure pipe displacement and the associated change in soil geometry which could have significant influence on the failure load.A series of 1g model tests has been conducted to examine the lateral breakout resistance for a shallowly embedded pipe in a soft clay. Two types of tests, (1) sideswipe tests and (2) probe tests, were conducted to examine the effect of pipe embedments and loading history on the breakout resistance of a partially embedded pipeline. Results were compared with other proposed predictions in order to provide a more rigorous basis for the prediction of the breakout resistance of a partially embedded pipeline.

AB - Stresses induced by thermal expansion of unburied seabed pipelines can be designed to be relieved through controlled lateral buckling, which requires accurate and reliable assessment of the lateral breakout resistance. The lateral breakout resistance is strongly dependent on the pipe embedment, soil strength and loading history of the pipe. In addition, prediction of the pipe movement during the breakout process is essential as it subsequently determines the lateral resistance at large displacement. Theoretical solutions based on plasticity theory are available for combined vertical and horizontal loading on partially embedded pipes. These solutions however ignore the pre-failure pipe displacement and the associated change in soil geometry which could have significant influence on the failure load.A series of 1g model tests has been conducted to examine the lateral breakout resistance for a shallowly embedded pipe in a soft clay. Two types of tests, (1) sideswipe tests and (2) probe tests, were conducted to examine the effect of pipe embedments and loading history on the breakout resistance of a partially embedded pipeline. Results were compared with other proposed predictions in order to provide a more rigorous basis for the prediction of the breakout resistance of a partially embedded pipeline.

KW - lateral breakout resistance

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Y2 - 26 January 2011 through 28 January 2011

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Lateral Breakout Resistance of Shallowly Embedded Offshore Pipelines

Abstract

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Research Keywords

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