CAJ | 학술논문

利用压力板仪,进行了不同细粒含量非饱和砂土的持水特征试验,分析砂土土-水特征曲线的特征,探讨细粒对砂土持水能力的影响.结果表明,细粒的增加提高了砂土的持水能力,不同吸力阶段细粒对持水能力的影响程度不同;基质吸力超过进气值后,细粒增加明显增强砂土持水能力.应用数学模型θ=a+b(1+(φ/c))~d描述不同细粒含量砂土的土-水特征曲线,分析了细粒含量对数学模型参数的影响,给出了细粒、基质吸力和含水率的函数关系为θ=f(φ,f_c) .
이용압력판의,진행료불동세립함량비포화사토적지수특정시험,분석사토토-수특정곡선적특정,탐토세립대사토지수능력적영향.결과표명,세립적증가제고료사토적지수능력,불동흡력계단세립대지수능력적영향정도불동;기질흡력초과진기치후,세립증가명현증강사토지수능력.응용수학모형θ=a+b(1+(φ/c))~d묘술불동세립함량사토적토-수특정곡선,분석료세립함량대수학모형삼수적영향,급출료세립、기질흡력화함수솔적함수관계위θ=f(φ,f_c) .
Experimental research on water retention characteristics of sand with different fine grains is carried out by pressure plate test to analyze the effect of fine grains on the soil water characteristic curve (SWCC). The results show that the water retention capacity of unsaturated sand enhanced with fine grains increase; while, the effect is varied in the regime of SWCC. The water retention capacity enhanced significantly when suction beyond air-entry value.θ=a+b(1+(φ/c))~d is advanced to describe the SWCC of silty sand. Then, the effect of fine grain content of silty sand on the parameters of SWCC equation is analyzed; and the relationship of fine grain, suction and water content is described by θ=f(φ,f_c).