Liquefaction around Pipelines under Waves
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 132, Issue 4
Abstract
This paper presents the results of an experimental study on liquefaction around a pipeline buried in a soil exposed to a progressive wave. The soil used in the experiments was silt with . The pore-water pressure was measured in the far field and on the pipe simultaneously. The tests indicate that the buildup of pore pressure and the resulting liquefaction in the soil are influenced by the presence of the pipe. The pore pressure builds up much more rapidly at the bottom of the pipe than in the far field (at the same level as the pipe bottom). By contrast, the buildup of pore pressure at the top of the pipe is not influenced radically by the presence of the pipe. The tests further indicate that as the liquefaction initially occurs in the very top layer and develops downwards, this picture changes in the vicinity of the pipe; in the latter case, the liquefaction initially occurs at the bottom of the pipe, and develops along the perimeter of the pipe upwards. The influence of the “no-slip” condition at the pipe surface on the end results has been investigated and found very significant. The influence of the wave height, the influence of the pipe diameter, the influence of the no-liquefaction-regime conditions, and the influence of a sinking pipe have also been investigated.
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Acknowledgments
This study was partially funded by the European Commission Research Directorates’ FP5 specific program “Energy, Environment and Sustainable Development” Contract No. UNSPECIFIEDEVK3-CT-2000-00038, Liquefaction Around Marine Structures (LIMAS).
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Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 132 • Issue 4 • July 2006
Pages: 266 - 275
Copyright
© 2006 ASCE.
History
Received: Jul 20, 2004
Accepted: Nov 19, 2004
Published online: Jul 1, 2006
Published in print: Jul 2006
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