›› 2011, Vol. 32 ›› Issue (9): 2635-2639.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A simplified capillary hysteresis model of porous media

LI Huan1, 2，WEI Chang-fu1，CHEN Hui1，CHEN Pan1，YI Pan-pan1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China
  • Received:2010-01-08 Online:2011-09-10 Published:2011-09-13

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Abstract: Soil water characteristic curve (SWCC) is one of the most important parameters for unsaturated porous media. Full SWCC is made up of 3 parts, which are initial drying curve(IDC), main drying curve(MDC) and main wetting curve(MWC) respectively. A lot of time has to be spent to perform a traditional hydralic hesteresis test. Based on the data from literatures, an empirical model is developed. Provided IDC and MWC in a certain porous media have been obtained by tests; this model, including only one material parameter, can be used to simulate an incremental-type MDC in the porous media. It is found that the simulating results agree well with the measured data; and it is shown that the proposed model is capable to describe MDC

Key words: unsaturated soils, soil-water characteristic curve, capillary hysteresis, porous media, mercury inject-withdrawal test

CLC Number: 

  • TU 411.4
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