CONSTRUCTION OF THE ROADBED WITH DEGRADATION OF PERMAFROST

SOORUZHENIE ZEMLIANOGO POLOTNA S DEGRADATSIEI VECHNOI MERZLOTY

The condition of the roadbed on one of the long-term conservation railroad sections in the Far East attests convincingly to the possibility of constructing a roadbed with permafrost degradation. This line passes through slanting terraces, going across into a contour of low, rounded, isolated hills, covered, in places, as a rule, by turfed horizontal or sloping stretches with numerous small knolls or ridges with swampy patches between, covered by dense growth, with separate thermal karst valleys and hillocks of heaving. The average yearly temperature of the air is 3.8 degrees C.; the air temperature oscillates within the limits of -53.5 degree and +33 degree. Strong solar radiation is observed. The possibility of constructing a roadbed with permafrost degradation here shows promise of year-around building in similar circumstances with normal construction techniques. The increase of the volume of earth work upon the supplementary enlargement of the embankment and the replacement from the settlement of hidden soils of the foundation does not exceed the analogous increase of the volumes of soil on the pourings off of the road shoulder, and also the required over estimation of the height of the embankment during construction with preservation of the permafrost. Manual labor is fully excluded, which is inescapable in the construction of turf heat-insulating coverings. The reliability of the roadbed in operation is guaranteed inasmuch as the possible settlements are reckoned into the constructions of the roadbed, and the reversibility of frost processes and soil freezing of the embankment below cannot cause random deformations.

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

  Mezhdunarodnaya Kniga

  Smolenskaya Sennaya Pl 32/34
  Moscow G-200,   USSR 
• Authors:
  • Solodovnikov, B I
• Publication Date: 1969

Language

• Russian

Media Info

• Features: Figures;
• Pagination: p. 40-42
• Serial:
  • Transportnoye Stroitel'stvo
  • Issue Number: 3
  • Publisher: Mezhdunarodnaya Kniga

Subject/Index Terms

• TRT Terms: Construction projects; Embankments; Freezing; Insulation blankets; Permafrost; Railroad transportation; Road construction; Soils; Subgrade (Pavements)
• Uncontrolled Terms: Degradation
• Old TRIS Terms: Soil freezing
• Subject Areas: Construction; Geotechnology; Highways; Railroads;

Filing Info

• Accession Number: 00130255
• Record Type: Publication
• Source Agency: Federal Railroad Administration
• Files: TRIS, USDOT
• Created Date: Nov 23 1977 12:00AM