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http://dx.doi.org/10.5389/KSAE.2012.54.4.093

A Study on Change of Soil-Water Retention Curve with Different Net Confining Pressures and Porosities using a Suction-Saturation Control Technique  

Lee, Joon-Yong (한국건설기술연구원 Geo-인프라연구실)
Yu, Chan (경상대학교 지역환경기반공학과 (농업생명과학연구원))
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.54, no.4, 2012 , pp. 93-103 More about this Journal
Abstract
A suction-saturation control technique based on flow pump system was developed to investigate hydraulic properties in unsaturated soils. The flow pump system is designed based on the principle of the axis-translation technique and triaxial equipment, and gives the suction-time and suction-saturation curves, the primary relationship needed for interpreting the response of unsaturated soils and link between theory and the material properties in unsaturated soil mechanics. Using the suction-saturation control technique, suction-time relationship and soil-water retention curve (SWRC) during hydraulic hysteresis were investigated with different net confining pressures and porosities. Three types of soils-two sands and a silt were used in this paper. This paper showed the effect of the hysteresis on the SWRC due to different net confining pressures and porosities. This means that a careful decision must be made as to which condition is to be modeled, since the delicate difference of the conditions in physical modeling can cause the different experimental output.
Keywords
Suction-saturation control technique, flow pump system; unsaturated soil mechanics; soil-water retention curve; net confining pressure; porosity; hydraulic hysteresis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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