NUMERICAL MODELING OF THERMAL INFLUENCE OF WATER THROUGHPUT PIPES WITH THE HEAT-INSULATION LAYER IN THE BASIS ON PERMAFROST (ON THE EXAMPLE OF THE RAILWAY LINE OF BOVANENKOVO – KARSKAYA)
The numerical modeling of temperature schedule of subgrade layer has been carried out within the section of railway line Bovanenkovo - Karskaya, and has been targeted to develop precise forecast of dynamics thermal influence on embankment in the locations of water throughput pipes (with the installation of a heat-insulation layer under a pipe), and to prevent dangerous geocriological processes emergence within embankment and its contiguous areas. The author suggests the schematization of the problem, where three different paths have been considered as critical possibilities of formation of the best and the worst facilities for thermal and mechanical interaction of water throughput pipes and permafrost layer. The numerical modeling results have shown the reduction of thermal effect on the pipe vertically with its lower surface needs a 10 cm thick heat-insulation layer packing. The thermal effect of horizontally oriented pipe is substantial when packing the heat-insulation layer.