摘要
采用Miller Soil Box方法分别测定同一压力状态、同一温度下3种不同土样的电阻率,分析了含水率和电势梯度对土体电阻率的影响,拟合出土体电阻率的计算公式.结果表明:土体电阻率与含水率有很大关系,大致以液限为分界,当含水率大于液限时,土体电阻率较小,且随含水率变化较小;当含水率小于液限时,土体电阻率较大,且随含水率减小而急剧增大.对于一定含水率的土体,土体电阻率随电势梯度的增大而减小.
The electrical resistivity of three different kinds of soil samples under the same consolidated pressure and temperature was measured by use of the Miller Soil Box.The influences of water content and potential gradient on the electrical resistivity of soil samples were investigated.A formula for the electrical resistivity of soils was established.The test results indicate that the electrical resistivity of soils is greatly related to the water content.When the water content is larger than the liquid limit of soils,the electrical resistivity of soils is relatively small and varies little with the water content.When the water content is less than the liquid limit,the electrical resistivity of soils is relatively large and rapidly increases with the decrease of the water content.For the soils with certain water content,the electrical resistivity of soils decreases with the increase of the potential gradient.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期575-579,共5页
Journal of Hohai University(Natural Sciences)
基金
国家高技术研究发展计划(863计划)(2007AA11Z115)
关键词
电渗
电阻率
电势梯度
含水率
electro-osmosis
electrical resistivity
potential gradient
water content
