Hydraulic Behavior of Filter Protected Silt under Cyclic Flow
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 8
Abstract
The spatial distribution of hydraulic gradients within a soil sample under cyclic flow with different frequencies was measured and compared with calculated results. The permeability within the soil before and after cyclic flow was compared. This study shows that a lower ratio of consolidation coefficient of the soil to the angular velocity of cyclic flow will result in higher hydraulic gradients at the boundaries, and lower gradients within the soil. This study suggests that besides geometrical parameters of soil and geosynthetics, the consolidation coefficient of the soil and the frequency of cyclic flow need to be considered as well in the design of filters under cyclic flow.
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Acknowledgments
This work is part of a research project supported by grants from National Natural Science Foundation of China (Grant No. NNSFC50479005) and National Postdoctoral Science Foundation of China (Grant No. UNSPECIFIED2005038041).
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© 2009 ASCE.
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Received: Apr 19, 2007
Accepted: Dec 31, 2008
Published online: Feb 23, 2009
Published in print: Aug 2009
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