沙土孔隙内水分形态及分布

通过CCD结合显微镜实验观察研究了沙土孔隙内水分分布形态。通过研究分析认为,除了传统上认为沙土中水分有吸附水、结合水和容积水等形态之外,相对粗糙的骨架表面还存在表面毛细水。低含湿率时,孔隙内水分形态有吸附水、结合水、表面毛细水和液桥(容积水);高含湿率时,孔隙中的水分并不是按孔隙均匀分布,而是出现大团水体中夹杂气团。对于气团中的孔隙,水分形态仍然有吸附水、结合水、表面毛细水和液桥。

Water morphology and distribution in soil and sands

By a CCD together with a microscope,a sequence of experimental investigation was conducted to visually observe water morphology and distribution in soil and sands.Results showed that except the adsorbed water,bound water and volumetric water,a new kind of water named surface capillary water(SCW) was found on relatively coarse matrix surfaces.At low moisture contents,water in soil and sands usually exits as adsorbed water,bound water,SCW and liquid bridges(volumetric water).At high moisture contents,there are many big water masses(also volumetric water) and big gas zones distributing in soil and sands.However,adsorbed water,bound water,SCW and liquid bridges can still be found in the gas zones.