摘要
非饱和土的复杂性和多变性决定了其渗透特性明显不同于饱和土,无法根据土壤的基本性质从理论上分析得出,试验难度也较大。本研究采用的稳态渗流试验装置,是根据非饱和土的特性设计出的非饱和土渗透系数直接测量的一种新方法,通过对粉土和砂质壤土两种非饱和土的渗透特性进行试验研究,得出了非饱和土含水量与渗透系数的基本关系。同时,对其关系曲线进行了van Genuchten-Mualem模型拟合,得出了很好的结果。
For complexity and diversity of unsaturated soil behaviors, there lies a great difference in permeability characteristics between unsaturated soil and saturated soil. It is difficult to perform test of unsaturated soil because of many factors. With the special apparatus of steady seepage, the permeability characteristics of unsaturated soil of is tested and studied, which sets up a new method for direct measuring the hydraulic conductivity of unsaturated soil. According to the test results, the relation between water content and hydraulic conductivity is obtained. The relation curves are fitted with the model of van Genuchten-Mualem to deduce correspondent fitting functions.
出处
《井冈山大学学报（自然科学版）》
2012年第2期76-79,87,共5页
Journal of Jinggangshan University (Natural Science)
基金
江西省教育厅青年科学基金项目(GJJ10209)
关键词
非饱和土
渗透系数
稳态渗流
试验研究
拟合
unsaturated soil
hydraulic conductivity
steady seepage
testing study
fitting
