为了探究长江堤防土的含水率、密实度与电阻率的关系,详细介绍了长江堤防洪湖段粉质壤土试样的含水率和密实度试验方法、电阻率试样盒的设计、电阻率的测试原理、电阻率测量过程和步骤;在测试成果分析的基础上,总结了粉质壤土试样含水率、密实度与电阻率的相关关系。结果表明:一定密实度下,含水率与电阻率为递减的幂函数关系;一定含水率下,密实度与电阻率呈负相关关系,密实度越大,电阻率越小;通过洪湖长江干堤探测实例可知堤基土现场测试和室内测试的电阻率值范围基本一致。室内试验成果将在提高反演解译质量、判定隐患体性质及物理状态方面均具有重要意义。

This paper introduces in detail the test method of moisture content and compactness of silty loam sample collected from Honghu segment of Yangtze River Embankment, the design and calibration of resistivity sample box, the test principle of resistivity and the process and steps of resistivity measurement. On the basis of analyzing test results, the correlations between moisture content, compactness and resistivity of silty loam sample are summarized. Under given compactness, water content displays a progressively decreasing power function with resistivity; at given water content, compactness is in a negative relation with resistivity. The measured resistivity range indoor is overall consistent with on-site detection result. The findings of laboratory tests will be of great significance in improving the quality of inversion interpretation and judging the nature and physical status of hidden dangers.