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本项研究利用GCTS土-水特征曲线仪对4组矿物成分相同颗粒级配不同的试样进行土水特征试验,分析单一变量颗粒级配对土-水特征曲线的影响。不同颗粒级配的土体,孔隙结构也不相同。随着粗颗粒含量逐渐减少、细颗粒含量逐渐增多,土体内孔隙减小,残余含水量以及含水量变化幅度逐渐减小,土水特征曲线趋于平缓,持水能力逐渐增强。
In this study, four soil samples with the same particle size and different mineral composition were tested for soil-water characteristics by GCTS soil-water characteristic curve analyzer. The influence of the single-variable particle size distribution on the soil-water characteristic curve was analyzed. Different particle size distribution of soil, pore structure is not the same. With the decrease of coarse particles, the content of fine particles gradually increased, the pores in soil decreased, the residual moisture content and water content decreased gradually, and the soil-water characteristic curve tended to be gentle and the water holding capacity gradually increased.