Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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A Study on Change of Soil-Water Retention Curve with Different Net Confining Pressures and Porosities using a Suction-Saturation Control Technique

흡입력-포화도 조절 기법을 이용한 불포화토의 함수특성곡선에 미치는 간극비 및 순구속압력의 영향 연구

  • 이준용 (한국건설기술연구원 Geo-인프라연구실) ;
  • 유찬 (경상대학교 지역환경기반공학과 (농업생명과학연구원))
  • Received : 2012.05.15
  • Accepted : 2012.06.20
  • Published : 2012.07.31
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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.

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References

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