›› 2016, Vol. 37 ›› Issue (10): 2839-2844.doi: 10.16285/j.rsm.2016.10.014

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Moisture migration of unsaturated soil due to thermal gradients

LI Yan-long1, WANG Jun1, WANG Tie-hang2   

  1. 1. School of Civil Engineering, Xuchang College, Xuchang, Henan 461000, China; 2. School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an, Shaanxi 710055, China
  • Received:2014-11-25 Online:2016-10-11 Published:2018-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51278397).

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Abstract: In order to obtain the law of moisture migration in unsaturated soil due to thermal gradient effect, experiments of vaporous water migration and moisture migration are carried out under different thermal gradients. Experimental results show that the temperature fields in all soil samples have been achieved steady within 24 h and changed linearly along the length direction of the soil samples. Migration quantities of vaporous water and liquid water both increase with the increase of temperature gradient, however the former is significantly greater than the latter. Temperature effect in vaporous water migration experiments increases significantly with the increase of initial water content of soil sample. By contrast, temperature effect in liquid water migration experiments has little relation with initial water content of soil sample. Finally, a function of water content gradient, which contains temperature gradient and initial water content, is developed.

Key words: unsaturated soil, thermal gradient, moisture migration, temperature effect

CLC Number: 

  • TU 411

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