3D Analysis of Seepage under Hydraulic Structures with Intermediate Filters
Publication: Journal of Hydraulic Engineering
Volume 141, Issue 1
Abstract
Seepage flow under hydraulic structures provided with intermediate filters has been investigated. The flow through the banks of the canal has been included in the model. Different combinations of intermediate filter and canal width were studied. Different lengths of the floor, differential heads, and depths of the sheet pile driven beneath the floor were also investigated. The introduction of an intermediate filter to the floor of hydraulic structures reduced the uplift force acting on the downstream floor by up to 72%. The maximum uplift reduction occurred when the ratio of the distance of filter location downstream from the cutoff to the differential head was 1. Introducing a second filter in the downstream side resulted in a further reduction in the exit hydraulic gradient and in the uplift force, which reached 90%. The optimum locations of the two filters occurred when the first filter was placed just downstream of the cutoff wall and the second filter was placed nearly at the middistance between the cutoff and the end toe of the floor. The results showed significant differences between the three-dimensional (3D) and the two-dimensional (2D) analyses.
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Acknowledgments
The authors would like to thank the anonymous reviewers and the editors for their constructive comments that helped improve the manuscript of this paper.
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Published In
Journal of Hydraulic Engineering
Volume 141 • Issue 1 • January 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 7, 2013
Accepted: Aug 11, 2014
Published online: Sep 22, 2014
Published in print: Jan 1, 2015
Discussion open until: Feb 22, 2015
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