doi:

DOI: 10.3724/SP.J.1249.2017.02157

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2017/34:2 PP.157-164

Improvement and experimental verification of transient temperature field calculation for freezing clay


Abstract:
We analyze the existing problems in the calculation of transient temperature field in freezing soil and identify that the main cause of the calculation error of transient temperature field is the change of unfrozen water content with the temperature in freezing clay. Based on the calculation model of unfreezing water content and the dynamic relationship of water/ice phase latent, we establish the heat-mass diffusion equations for freezing clay, and analyze the transient temperature field. By using three existing calculation methods and the proposing transient temperature field calculation method in freezing soil, we conduct the simulation of the transient temperature field of artificial freezing experiment for model slot by ABAQUS software, and compare the four simulation results with the experimental results, respectively. The results show that the method of calculating transient temperature field in freezing clay is not only theoretically reliable but also more accurate than three existing methods. The method can improve the calculation accuracy of the coupled problem of moisture-heat-stress, and then serves the design and practice of artificial freezing method.

Key words:frozen soil engineering,artificial freezing,moisture-heat-stress coupled,transient temperature field,latent heat,freezing clay

ReleaseDate:2017-04-10 18:10:20



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