摘要
在对国内外相关研究成果做文献综述的基础上,对影响电阻率测试结果的几个重要因素如温度、测试频率、测试方法、土样与电极间的接触问题等进行了专门探讨,并对电阻率方法的缺点与不足之处进行了分析。土的电阻率受温度影响显著,且在0℃上下因相变而更加复杂;污染土的电阻率与温度间关系与污染物成分及含量密切相关;对于非饱和土的电阻率量测存在一个相对合理的频率范围;相比而言,四电极法可以避免电极极化效应的影响,测量结果也比较准确,但两电极法线路连接方便,易于和常规土工仪器配套使用。
The several problems including temperature,test frequency,test method,and contact between soil sample and electrodes,which influence the test result of electrical resistivity of soils,are discussed based on literature review.Finally,the shortcomings and limitations of electrical resistivity method are also analyzed.Electrical resistivity of soil is greatly influenced by temperature,which becomes especially complicated around 0℃.The relationship between electrical resistivity and corresponding temperature of contaminated soils are closely related with the constituents and content of contamination.For unsaturated soils,research results show that there exists a relatively reasonable frequency range.Though four-electrode configuration can avoid polarization effect and achieve relatively accurate test result,two-electrode configuration is easier to be set up and cooperate with common soil test apparatus.
出处
《公路》
北大核心
2010年第9期187-192,共6页
Highway
关键词
土的电阻率
测试
温度
测试频率
接触
electrical resistivity of soil
measurement
temperature
test frequency
contact
