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Sciences in Cold and Arid Regions ›› 2015, Vol. 7 ›› Issue (4): 293-299.doi: 10.3724/SP.J.1226.2015.00293

• ARTICLES •    

Accounting for the solar radiation in thermal regime prediction for railway subgrade in cold regions

Alexander Isakov, Anna Lavrova   

  1. Department of Survey, Design and Construction of the Railways and Roads of the Siberian State University of Railway Engineering, Novosibirsk, Russia
  • Received:2015-04-17 Revised:2015-06-10 Published:2018-11-23
  • Contact: Professor Alexander Isakov, Head of Department of the Siberian State University of Railway Engineering,Novosibirsk, Russia. Tel: +7-913-9858285; E-mail: mylab@ngs.ru E-mail:mylab@ngs.ru

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Abstract: This paper presents a comparative analysis of simulation processes of seasonal freezing-thawing of railway subgrade and permafrost degradation, with and without accounting for solar radiation. Also, the effect of sun screens to reduce the degradation of subgrade permafrost under different climatic conditions is numerically substantiated. And finally, the temperature criterion of the origination of permafrost is illustrated.

Key words: solar radiation, thermal balance, subgrade seasonal freezing-thawing, permafrost, cryolite zone

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