불포화토의 흙-수분 특성곡선에 관한 실험적 고찰
Experimental Study for Soil-Water Characteristic Curves of Unsaturated Soil
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초록
흙 분류상 명확하게 구분되는 4종류의 시료를 선정한 후, 다짐상태를 달리하여 간극상태를 4단계로 조절한 공시체를 만들고, 이를 개조된 Pressure Plate Apparatus를 사용하여 약 14단계의 공기압을 다르게 가하면서 흡인력 시험을 수행하여 공시체의 수분 이동량을 측정하였다. 측정된 결과를 바탕으로 각 시료의 함수비, 포화도 및 체적 함수비를 분석하여 흙-수분 특성곡선을 도출하였다. 이들의
Abstract
The purpose of this paper is to investigate the soil-water characteristic curves for an unsaturated soil. To this ends, a series of suction measured test was conducted on the selected 4 kinds of soils taken from different sites of Korea, using modified pressure plate apparatus.Form the test results, the water contents, degree of saturation and volumetric water contents were analyzed with the suction. And the soil-water characteristic curves of unsaturated soil were drawn from the test results for various factors. The characteristic curves drawn with water content vs matric suction were classified certainly the difference in wet side but were not classified in dry side. The characteristic curves drawn with degree of saturation vs matric suction for unsaturated soil were shown the opposite inclination as compared with the former curve. But the characteristic curve with volumetric water content vs matric suction was described suitably not only in wet side condition but also in dry side. And it was found that the volumetric water contents of loose soil was high at the initial condition but that of dense soil was high at final condition (dry side).