Wave Scour around a Pile in Sand, Medium Dense, and Dense Silt
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 133, Issue 1
Abstract
This paper summarizes the results of an experimental investigation on wave scour around a circular pile in three kinds of soil, namely in dense silt (with a relative density of ), in medium dense silt (with ), and in sand (with ). The dense silt was achieved by wave liquefaction. Upon the completion of the liquefaction/compaction process, the pile was subjected to wave induced scour. The range of the Keulegan-Carpenter number , tested in the experiments is from practically 0 to approximately 20. The Shields parameter in the experiments was such that the bed was live. The scour depth was increased by a factor of 1.6–2 when the bed soil was changed from medium dense silt or sand to dense silt. This is partly due to an increase in the angle of friction. The time scale of scour also was influenced by the density of the soil. The time scale was largest for the dense silt case, and smallest for the sand case in the experiments.
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Acknowledgments
This study was partially funded by the Commission of the European Communities, Directorate-General XII for Science, Research and Development FP5 specific program “Energy, Environment and Sustainable Development,” Contract No. UNSPECIFIEDEVK3-CT-2000-00038, Liquefaction Around Marine Structures (LIMAS), and by the Danish Research Council (STVF) Research Frame Programs “Exploitation and Protection of Coastal Zones” (EPCOAST). Ms. Figen Hatipoglu’s stay at the Technical University of Denmark during the course of the study has been partially supported by two postdoctoral scholarships, one from the Scientific and Technical Research Council of Turkey (TUBITAK) and the other from the Istanbul Technical University Research Fund, along with support from LIMAS and EPCOAST.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 133 • Issue 1 • January 2007
Pages: 14 - 27
Copyright
© 2007 ASCE.
History
Received: Jul 14, 2004
Accepted: Nov 19, 2004
Published online: Jan 1, 2007
Published in print: Jan 2007
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