›› 2011, Vol. 32 ›› Issue (5): 1405-1410.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

An indirect method for predicting permeability coefficients of unsaturated soils at different temperatures

CAI Guo-qing, ZHAO Cheng-gang, LIU Yan   

  1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2011-02-02 Online:2011-05-10 Published:2011-09-23

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Abstract: Research interest in the temperature effect on the permeability of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving thermal effects, such as high-level nuclear waste disposal, buried heat-supply pipelines and high-voltage cables. Based on the research of temperature effects on soil-water characteristic curve (SWCC) of unsaturated soils, an indirect method for predicting permeability coefficients of unsaturated soils at different temperatures is presented. by using the method of relative permeability coefficients from the SWCCs. The new expressions are made for the entire suction range of SWCC; and hence it has a broader applicability. Based on the experiments of MX-80 bentonite and loess, model predictions of relative permeability coefficient at different temperatures with suctions are made, which show satisfactory results.

Key words: unsaturated soils, relative permeability coefficient, temperature effects, soil-water characteristic curve (SWCC)

CLC Number: 

  • TU 43
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