The experience of construction and operation of small and medium railroad bridges in regions of permafrost soil distribution exposed the substantial insufficiencies of traditionally constructed foundations. Massive and standing foundations on natural bases require large expenditures of manual labor because the foundation pits for the foundations must be dug by pneumatic drills, and this alone aggravates the possibility for degradation of the permafrost, leading to deformation of the foundations during operation, and sometimes during the construction period as well. The construction of massive foundations, including the block ones, involves large amounts of concrete ("wet") labor, which carries with it supplementary expenditures for ensuring the quality of concrete in the cold period and the organization in each section of its own management of concrete. The pile foundations which were until lately considered to be the best construction for the permafrost regions propose the sinking of significant quantities of piles (8-20) upon a small area, which seriously complicates the conditions for drilling and their installation into the boreholes. The experience of bridges with columnar foundations revealed their promise and allows their recommendation for further application. Lately pipe-type foundations have been proposed for the Bajkal-Amur main- line railroad, which fully excludes the foundation pit construction method. Calculations and practice show that the labor consumption for pipe-type foundations is two to three times less than for foundations on a natural base; this significantly economizes materials and lowers construction time sharply. Pipe-type foundations allow the reduction to a minimum of the "wet" processes during installation and transferences of the preparation of the reinforced concrete construction from the construction area to the base plants, thus allowing the quality of construction to be raised. In comparison with pile foundations the quantity of boreholes is sharply lowered; this also reduces construction time and improves drilling and installation conditions. In addition, the construction of pile-type foundations significantly decreases the possibility of degradation of the permafrost.

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

    Institute of Railway Transportation Engineers

    Novosibirsk,   USSR 
  • Authors:
    • Riazanov, Iu S
    • Iampol', A G
  • Publication Date: 0


  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130267
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: No. 170 Proceeding
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1977 12:00AM