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http://dx.doi.org/10.7843/kgs.2021.37.4.5

A Study on theProperty of Seepage in the Curved Levee by Numerical Analysis  

Park, Choon-Sik (Dept. of Civil, Environment and Chemical Engrg., Changwon National Univ.)
An, Byeong-Ho (Geoheartengineering)
Publication Information
Journal of the Korean Geotechnical Society / v.37, no.4, 2021 , pp. 5-17 More about this Journal
Abstract
In this paper, three-dimensional analysis of the curved levee was performed according to curvature angle, and radius of curvature to investigate the property of seepage. The hydraulic gradients in the curved parts of levees decreased in the outer levee and increased in the inner levee, compared to the two-dimensional analysis. The smaller the curvature angle and the radius of curvature, the larger the change of the hydraulic gradient, compared to the two-dimensional analysis. The effect of curvature radius on the hydraulic gradient was greater than the curvature angle. As a result of evaluating the piping safety factor for the critical hydraulic gradient, the safety factor was increased by 2~5% in the outer levee and decreased by 4~12% in the inner levee, compared to the two-dimensional analysis. Considering this reduction, if the two-dimensional analysis is performed on the curved part of the levee, and if designed the safety factor for piping is 0.1~0.3 greater than allowable FS=2.0, the safety factor of the curved part is slightly reduced, but there is no difficulty in securing stability.
Keywords
Curved levee; Hydraulic gradient; Numerical investigation; Property of seepage;
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