DETERMINATION OF THE THICKNESS OF A HEAT-INSULATING INTERLAYER

OPREDELENIE TOLSHEHINY TEPLOIZOLIRUIUSHCHEI PROSLOIKI

In the past several years good results have been obtained in lowering the depth of freezing of soils with the help of thin heat-insulating interlayers. Widely utilized in the capacity of heat-insulators for protecting the soil from freezing are sturdy foam plastics, light concrete based on foam plastics (styropore-concrete), porous clay filler processed with bitumen, compressed peat, wood crust, and other light materials. In the USSR several sections of rail and automobile roads have been constructed which are heated by foam plastics. Depending upon the thickness of the heat- insulating interlayers of this material the soil freezing process can be substantially diminished or even fully prevented. Therefore the correct definition of the heat- insulating interlayer attains very important practical significance. Data from current observations on soil freezing heated by foam plastic and other light materials bears witness that the thickness of heat-insulating interlayers depends upon local climatic conditions that mainly influence the depth of freezing of the soils, the properties of the heat-insulator (coefficient of water- permeability and specific thermal capacity) and its distribution in road constructions. On the basis of this data a formula has been elaborated by the author for determining the thickness of heat-insulating layers which fully protect the soil from freezing but can also be used for determining the thickness of heat-insulating interlayers in railroad embankments, as well as for calculating the heating of pits and others objects.

• Supplemental Notes:
  • Abstract only is available in English, original untranslated as of November 1976.
• Corporate Authors:

  Mezhdunarodnaya Kniga

  Smolenskaya Sennaya Pl 32/34
  Moscow G-200,   USSR 
• Authors:
  • Gaivoronskii, V N
• Publication Date: 1974

Language

• Russian

Media Info

• Pagination: p. 39-40
• Serial:
  • Transportnoye Stroitel'stvo
  • Issue Number: 12
  • Publisher: Mezhdunarodnaya Kniga

Subject/Index Terms

• TRT Terms: Concrete; Electric insulating materials; Foundations; Freezing; Heat insulating materials; Heating (Structures); Insulating materials; Insulation blankets; Interfaces; Low temperature; Plastic foams; Plastics; Porous materials; Railroad transportation; Soils; Subgrade (Pavements); Thickness
• Old TRIS Terms: Interlayer spaces; Soil freezing
• Subject Areas: Geotechnology; Highways; Railroads;

Filing Info

• Accession Number: 00130249
• Record Type: Publication
• Source Agency: Federal Railroad Administration
• Files: TRIS, USDOT
• Created Date: Nov 23 1977 12:00AM