CALCULATION OF THE THICKNESS OF A HEAT-INSULATION PROTECTION FROM FOAM PLASTIC

RASCHET TOLSHCHINY TEPLOIZOLIRUIUSHCHEI ZASHCHITY IZ PENOPLASTOV

Generally defined are the necessary layers of the covering and the necessary relationship of the gaps to the areas of the slabs which ensure the depth of the soil freezing beneath the covering up to a given size (taking into consideration not permitting freezing below the covering). In table 1 are set out the basic calculation characteristics of the constructional foam plastics having limits of stability to a pressure of not less than 3 kilograms of force per square centimeter, which can be successfully utilized in the capacity of anti-heaving heat-insulating means. Table 2 lays out analogous characteristics of several ballasts and soils. The volume weight, thermal conductivity, and volume thermal capacity in foam plastics is many times smaller than in thawed and frozen ballasts and soils. Table 3 provides technical indications for the relationship of the freezing depth of anti-heaving material to the freezing depth of the soil which is located above the level of the soil waters. Table 4 shows the results of calculations for two test sections.

• Supplemental Notes:
  • Full translation available for reference. Contact Technology Planning Officer, Office of Research and Development, Federal Railroad Administration, U.S. DOT.
• Corporate Authors:

  Ministerstvo Putei Soobshcheniya SSSR

  Novoryazanskaya ul., Dom 12
  Moscow 288,   USSR 
• Authors:
  • Shakhuniants, G M
  • Voitov, S A
• Publication Date: 0

Language

• Russian

Media Info

• Features: Tables;
• Pagination: p. 38-40
• Serial:
  • Put' i Putevoye Khozyaistvo
  • Issue Number: 0
  • Publisher: Ministerstvo Putei Soobshcheniya SSSR

Subject/Index Terms

• TRT Terms: Electric insulating materials; Freezing; Frost heaving; Heat insulating materials; Heating; Insulating materials; Insulation blankets; Plastic foams; Plastics; Railroad transportation; Soil types; Soils; Thickness; Water table
• Uncontrolled Terms: Soil classification
• Old TRIS Terms: Soil freezing
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; Railroads;

Filing Info

• Accession Number: 00130258
• Record Type: Publication
• Source Agency: Federal Railroad Administration
• Report/Paper Numbers: No. 12
• Files: TRIS, USDOT
• Created Date: Nov 23 1977 12:00AM