A COVERING OF QUICK-HARDENING FOAM PLASTIC FOR PROTECTING SOIL FROM FROST

POKRYTIE IZ BYSTROTVERDEIUSHCHEGO PENOPLASTA DLIA PREDOKHRANENIIA GRUNTA OT PROMERZANIIA

Up to 40% of the volume of ground work during construction of railroad roadbeds is carried out during the winter. In these conditions the working of pits and depressions follows laborious processes of soil loosening by explosive or mechanical means. During the construction of the roadbed of secondary tracks the loosening of soils by explosion leads frequently to collapses of the operating track. Therefore there is great practical interest in the experience accumulated in the conservation of open pit soils from seasonal freezing by means of quick-hardening foam plastic on the basis of ureaformaldehyde resin. The soil heated by this method is found in a practical condition before working the open pit, thanks to which construction machines can be operated near to summer norms. The article goes on to develop a definition of the necessary thickness of the heating layer effectively protecting the soil from seasonal freezing. It is important, during design of the foam plastic insulation for depression in the secondary track, to ensure rational construction of the heat-insulating layers of foam plastic on road slopes and shoulders. The authors carried out verification calculations for wet ureaformaldehyde foam plastic with humidity of 20%.

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

    Mezhdunarodnaya Kniga

    Smolenskaya Sennaya Pl 32/34
    Moscow G-200,   USSR 
  • Authors:
    • Tkachevskii, I D
    • Filippov, G S
    • Riabov, V M
  • Publication Date: 1973

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130257
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1977 12:00AM