Reduction of pier scour using bed suction and jet injection
Date of Issue2014
School of Civil and Environmental Engineering
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 Q s /Q 0 = 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.
DRNTU::Engineering::Civil engineering::Water resources
Proceedings of the ICE - water management
© 2014 Institute of Civil Engineers Publishing. This paper was published in Proceedings of the ICE - Water Management and is made available as an electronic reprint (preprint) with permission of Institute of Civil Engineers Publishing. The published version is available at: [http://dx.doi.org/10.1680/wama.12.00028]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.