岩土力学2011，Vol.32Issue(11)：3269-3275,7.
土壤电阻率测量影响因素的试验研究
Experimental investigation on influencing factors in soil resistivity measurement
周蜜 1王建国 1黄松波 1豆朋 2张丽镪 2姚伟1
作者信息
- 1. 武汉大学 电气工程学院,武汉 430072
- 2. 广东电网公司佛山供电局,广东佛山 528000
- 折叠
摘要
Abstract
Accuracy of soil resistivity measuring result in the laboratory will be influenced by electrodes arrangement, types of test signal, etc. Five types of soils with different textures are selected to investigate the influencing factors of soil resistivity measurement. A comparison of resistivity measuring results between four-electrode method and two-electrode method is made firstly; and the influence of potential electrode penetrations in four-electrode method is also studied. A comparison between the resistivity measuring results with DC and AC voltage test signal is made. Moreover, influence of the current density and AC signal frequency on soil resistivity measuring results has also been investigated here. The results have shown that, measuring results by two-electrode method contain the contact resistance between electrodes and the soil, which will increase rapidly when the water content of soils decreases. The soil resistivity test can be performed with little penetration, or little disturbance to the tested soils by the four-electrode method. Alternating current test signal should be used to prevent polarization effect of DC voltage. Due to the fact that thermal capacity of the test soil is limited, current densities should be kept less than 1 mA-cm-2 to test soils with electrical resistivity less than 200 Ω-m. Soil resistivity has been found to be decreased as test signal frequency increases.关键词
土壤电阻率/二极法/四极法/接触电阻/极化效应Key words
soil resistivity/two-electrode method/four-electrode method/contact resistance/polarization effect分类
建筑与水利引用本文复制引用
周蜜,王建国,黄松波,豆朋,张丽镪,姚伟..土壤电阻率测量影响因素的试验研究[J].岩土力学,2011,32(11):3269-3275,7.
