›› 2007, Vol. 28 ›› Issue (8): 1671-1676.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

The electrical resistivity characteristics of unsaturated clayey Soil

ZHA Fu-sheng1, 2, LIU Song-yu1, DU Yan-jun1, CUI Ke-rui2   

  1. 1.Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China； 2. School of Resources & Environmental Engineering, Hefei University of Technology, Hefei 210009, China
  • Received:2005-09-01 Online:2007-08-10 Published:2013-10-15

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Abstract: Electric current flows through clayey soils by the conduction of void water, electric double layer and clay minerals. The electrical characteristics of clay are discussed at first. Based on the hypothesis that there are three conductance pathways in unsaturated clay, and aiming at the deficiency of the existing models of unsaturated clayey soil, the electrical resistivity model of unsaturated clayey soil is studied. The main factors which affect the electrical resistivity of soils are summarized and analyzed. Through the laboratory tests, the characteristics of the influences of water content, the resistivity of pore fluid, temperature and porosity on the electrical resistivity of Hefei expansive soil are studied.

Key words: unsaturated clay, conductance, electrical resistivity, expansive soil

CLC Number: 

  • TU 411
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