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http://dx.doi.org/10.12652/Ksce.2012.32.1C.007

Unsaturated Permeability Characteristics of Silty Sand on the Nak-dong River  

Kim, Young-Su (경북대학교 건축토목공학부)
Shin, Ji-Seop (경북대학교 건축토목공학부)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.32, no.1C, 2012 , pp. 7-16 More about this Journal
Abstract
In this paper, using the principle of Static Measurement Methods suggested by Huang (1998), a new experimental device has been made and used in order to calculate the unsaturated permeability of Nak-dong river sand with silt which is an important basic property in the unsaturated soil. This device was designed to measure changes of the unsaturated permeability according to the increase of matric suction. The value of the unsaturated permeability obtained in testing and that obtained using the empirical permeability functional formula were compared and analyzed. As a result, the value of the unsaturated permeability tends to be decreased according to the increase of relative density, silt content and matric suction. This tendency shows it is very closely related to the change of moisture content and void ratio. The empirical permeability functional formula presented by Frelund & Xing (1995) was regarded as the most appropriate model to represent the unsaturated permeability of Nak-dong River silty sand.
Keywords
unsaturated soil; matric suction; permeability; silty sand;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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