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饱和砂性土的孔隙水电导率直接反映了孔隙水中离子的含量,对研究土体离子污染有重要意义。饱和砂性土中孔隙水电导率与土体电导率之间呈线性关系,符合Archie定律。研究了Archie定律在不同类型砂土中的m系数取值范围,提出了利用TDR测试技术监测饱和砂性土孔隙水电导率的方法。试验结果表明TDR能够很好地测得饱和砂性土的孔隙水电导率。研究成果对于土体中离子污染物监测有重要的应用价值。
The pore water conductivity of saturated sandy soil directly reflects the content of ions in pore water and is of great significance for the study of soil ion pollution. Saturated sand soil pore water conductivity and soil electrical conductivity of a linear relationship between, in line with Archie’s law. The range of m coefficient of Archie’s law in different types of sand was studied. A method to monitor the conductivity of saturated sand soil by TDR was proposed. The experimental results show that TDR can well measure the pore water conductivity of saturated sandy soil. The research results have important application value for the monitoring of ionic contaminants in soils.