Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (1): 207-213.doi: 10.13278/j.cnki.jjuese.201501202

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Numerical Solution and Test of Results for a Hydrothermal Coupled Model About Frozen Soil

Li Yang1,2, Wang Qing2, Wang Tanhua2   

  1. 1. Department of Civil Engineering, Fujian University of Technology, Fuzhou 350014, China;
    2. College of Construction Engineering, Jilin University, Changchun 130026, China
  • Received:2014-04-27 Published:2015-01-26

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Abstract:

A hydrothermal coupled model established previously by the author based on the theory of porous media seasonally frozen soil was solved numerically in this article. First, the model equations were corrected, and the method to determine parameters in equations was given. Then Changchun-Songyuan highway soil was chosen as the object for the study, and the case of frozen moisture migration can be predicted in the actual project. Model was solved under the given circumstances the model boundary conditions, and the model solution results were compared with actual field monitoring results. The comparative data of temperature gradient show that the model can predict the final value of the parameter, while the middle of the process error is large, but the same trend. The comparative data of direction and the amount of moisture migration indicates that the model results to be less than the measured results, but overall the same trend. And the same with temperature gradient that the final values agree well with the smallest error, an average of about 2%. The results show that the model can simulate calculated parameters for the final values, but there is an error, and the error is within an acceptable range.

Key words: porous media, hydrothermal transfer, coupling model, temperature, moisture content

CLC Number: 

  • TU443

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