CALCULATION OF THE DEPTH OF FREEZING OF SOILS AND OF THE THICKNESS OF ANTI-HEAVING COVERINGS

K RASCHETU GLUBINY PROMERZANIIA GRUNTOV I TOLSHCHINY PROTIVOPUSHINNYKH POKRYTII

The calculation of the thickness of anti-heaving coverings and the freezing depths of soils is necessary for the elaboration of effective procedures for controlling unequal heaving of soils of railroad roadbeds. For the definition and planning of the thickness of anti-heaving coverings data from geological and engineering inspections of heaving sections of the roadbed were used. In the process of inspection the depth of the seasonal freezing and the physical heat properties of the frozen soil are determined. According to the data obtained in this manner a calculation is carried out of the thickness of the anti-heaving covering or of exchange of the heaving soil by another, non-heaving material (slag, asbestos, by-products, sandy gravel soil, etc.) The purpose of this report is to attempt to give (according to the results of full-scale observations carried out on the West-Siberian railroad from 1962 to 1967) a method of calculation of the thickness of the anti-heaving covering at a certain depth of the seasonal freezing of the soil, including its humidity, the seepage of the heat from below during the sinusoidal change of the temperature at the surface, and soils in the freezing period. The calculation should be made taking into account climatic factors and physical heat characteristics of the material of the anti-heaving covering which influence its thickness. Such climatic factors are the amplitude of the temperature oscillations on the surface and the average yearly temperature of the soil at the base of the seasonal freezing layer. The article elaborates a method for the calculation entailing over 50 equations.

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

    Institute of Railway Transportation Engineers

    Novosibirsk,   USSR 
  • Authors:
    • Kopytov, I A
  • Publication Date: 0

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130251
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: No. 74 Proceeding
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1977 12:00AM