›› 2009, Vol. 30 ›› Issue (6): 1658-1664.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Temperature distribution along piles in permafrost regions

XIONG Wei 1, 2, 3，LIU Ming-gui3，ZHANG Qi-heng1，WANG Zhi-ming4   

  1. 1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China; 2. Graduate School, Chinese Academy of Sciences, Beijing 100049, China; 3. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 4. School of Physics & Information Engineering, Jianghan University, Wuhan 430056, China
  • Received:2009-03-26 Online:2009-06-10 Published:2011-03-09

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Abstract:

In order to control the influence of pouring concrete of bridge piles on the ground temperature in permaforst regions and guide the subsequent engineering construction, it is necessary to analyze and study the temperature distribution along piles. Considering the characteristics of piles in permafrost regions and the basic rule of heat transfer in soil during freeze-thaw cycling, the control equations of temperature field in permafrost regions are established based on the theories of porous media and thermodynamics. The effects of heat conduction and latent heat on the temperature distribution are considered, and the release rule of concrete hydration heat is studied by control equations. The research results are compared with the in-situ monitored temperature field of a bored pile with large diameter in Tibet. It is concluded that the calculated results are in good agreement with the in-situ monitoring data. Based on this, emphasis is laid on analyzing the changes of soil temperature around the pile in different depths with time and temperature distribution in the radial direction of pile diameter in different phases. It is of great theoretical and practical significance to the foundation stability of bridge and culvert as well as the traffic operation safety of highways and railways in permafrost regions

Key words: permafrost, temperature field of pile, hydration heat, latent heat of phase change

CLC Number: 

  • TU 443
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