Abstract: 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.

Key words: Yangtze River Embankment soil, water content, compactness, resistivity, resistivity sample box, correlation, nature of hidden dangers