西南交通大学学报2011，Vol.46Issue(1)：42-48,7.DOI:10.3969/j.issn.0258-2724.2011.01.007
基于TDR技术的多种岩土介质含量试验研究
Measurement of Water Content of Multiple Geomaterials by Time-Domain Reflectometry Technique
摘要
Abstract
In order to find a suitable method for measuring the water content of multiple geomaterials,an interaction model between electromagnetic wave and mixed media was built based upon polarization mechanism. The relationships between dielectric constant and each of material, porosity, and water content of multiple geomaterials including silt, sand, clay, paper, plastic, organics, and municipal solid waste were studied by time-domain reflectometry (TDR) technique. The results show that the dielectric constant of different geomaterials is mainly determined by its water content and porosity , and slightly influenced by its material type. The theoretical model proposed is suitable for geomaterials with different material type and porosity. In addition, the square root of dielectric constant is in good linear relationship with volumetric water content. The dielectnc constant of geomaterial has a negative correlation with its porosity under the same volumetric water content. Furthermore, the water content of organics can be measured by TDR technique nondestructively, which provides an experimental basis for the use of TDR in landfills.关键词
岩土介质/城市固体废弃物/含水最/室内试验/时域反射法(TDR)/孔隙率分类
资源环境引用本文复制引用
陈赟,陈云敏,周群建..基于TDR技术的多种岩土介质含量试验研究[J].西南交通大学学报,2011,46(1):42-48,7.基金项目
国家自然科学基金资助项目(50538080) （50538080）
