FROZEN AND WARM BELTS AND THERMAL AMELIORATION OF ICED-OVER SECTIONS

MERZLOTNYE I TEPLOVYE POIASA I TEPLOVAIA MELIORATSIIA NALEDNYKH UCHASTKOV

This report reaches the following conclusions: (1) The thermal process of the belt is determined mainly by the strength of the snow covering. In the absence of snow covering or in the case of its systematical recession the belt operates as a frost, accelerating the freezing of the soil and the formation of the frost crosspiece, especially in low air temperatures. In the absence of sufficient snow covering strength the belt operates as heating. (2) A cause for the defrosting of the permafrost soil under especially wide frost belts is the destruction of the natural thermafrost operation of the soil as the result of removing the peat-growing covering on the sections adjacent to the belt, and the lack of a systematic cleaning of the belt of snow. (3) Frost belts with a width of 1-2 m., and, in austere climatic condition over 0.6m., ensure reliable, quick, and sufficiently deep freezing of the soil and formation of the frost groove. Work and means expenditure for cleaning such belts of snow are brought down to the minimum. (4) Frost belts wider than 2 m. require greater outlays for maintenance. These outlays are sometimes so large that it becomes expedient to apply other means for controlling ice. (5) Taking into account devices which lead water off in the permafrost region, and the fact that this changes the thermal behavior of the soil, as well as the fact that widths of up to 2 m. ensure necessary freezing intensity of the soil beneath them, it is expedient to use raised channels as frost belts. (6) If, according to local conditions, it is possible to create a strong snow covering over a belt with the help of snow-retaining nets, it is expedient to apply heat belts. (7) During planning of the mechanisms on frozen sections it is necessary to produce, in addition to hydraulic, technical heat calculations for the definition of a thermal behavior of the soil and changes of behavior of the subterranean water.

  • Supplemental Notes:
    • Abstract only is available in English, original untranslated as of November 1976. From the book "Control of Icing on Railroads and Highways" (Bor'ba s nalediami na zheleznykh i avtomobil'nykh dorogakh).
  • Corporate Authors:

    Transport Publishing House

    Basmannyi Tupik 6A
    Moscow B-174,   USSR 
  • Authors:
    • Rumiantsev, E A
  • Publication Date: 1966

Language

  • Russian

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 55-71

Subject/Index Terms

Filing Info

  • Accession Number: 00130254
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1976 12:00AM