The influence of a combined system of jet injection through the pier and bed suction on the reduction of local scour around a circular pier was investigated in a laboratory flume. Experiments were conducted for two water depths (10·5 and 28 cm) under 1-jet and 3-jet injection and different angles between the jets, with bed suction rate Qs/Q0 = 2%, in turbulent flow and clear-water scouring conditions. The results show that the bed suction modifies the effect of jet scouring and reduces the local scour and sediment transport at the pier (36% for scour depth, 25 and 42% for the area and volume of scour hole). The maximum reduction of the scour depth was about 50% (about 20, 39 and 39% for the area, volume and the upstream slope of the scour hole respectively) in the best configurations for a combined countermeasure.
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February 2014
Research Article|
February 01 2014
Reduction of pier scour using bed suction and jet injection Available to Purchase
Somayeh Soltani-Gerdefaramarzi;
Somayeh Soltani-Gerdefaramarzi
PhD student
water engineering, Isfahan University of Technology, Isfahan, Iran
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Hossein Afzalimehr;
Hossein Afzalimehr
Associate Professor
Department of Water Engineering, Isfahan University of Technology, Isfahan, Iran
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Yee-Meng Chiew;
Yee-Meng Chiew
Professor
School of Civil and Environmental Engineering, Nanyang Technological University, Singapore
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Jacques Gallichand
Jacques Gallichand
Professor
Département des sols et de génie agroalimentaire, Université Laval, St-Foy, QC, Canada
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Publisher: Emerald Publishing
Revision Received:
February 06 2012
Accepted:
May 03 2012
Online ISSN: 1751-7729
Print ISSN: 1741-7589
ICE Publishing: All rights reserved
2014
Proceedings of the Institution of Civil Engineers - Water Management (2014) 167 (2): 105–114.
Article history
Revision Received:
February 06 2012
Accepted:
May 03 2012
Citation
Soltani-Gerdefaramarzi S, Afzalimehr H, Chiew Y, Gallichand J (2014), "Reduction of pier scour using bed suction and jet injection". Proceedings of the Institution of Civil Engineers - Water Management, Vol. 167 No. 2 pp. 105–114, doi: https://doi.org/10.1680/wama.12.00028
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