PRELOADING BY VACUUM: CURRENT PROSPECTS

The concept of using atmospheric pressure to apply a precompression load for accelerating the consolidation of foundations for embankments constructed on soft clay soils was first described by Kjellman in 1952. The method, although theoretically sound, was impractical then because the plastic sheets that covered the sand filter deteriorated rapidly in field use, and consequently the vacuum could not be easily maintained. Recently, new plastic and fabric materials have been developed that promise to make the Kjellman vacuum preloading method practical. The materials are cheap, strong, and resistant to deterioration by sunlight and weather. Practical applications and several specific advantages of the vacuum method are described, and factors affecting the costs of highway and other preloading construction are given. Depending on the relative costs of the fill materials and the plastic membranes, the vacuum method be significantly cheaper than conventional preloading using sand or gravel surcharge fills.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 26-29
  • Monograph Title: SOIL AND ROCK MECHANICS, CULVERTS AND COMPACTION
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129490
  • Record Type: Publication
  • ISBN: 0309024536
  • Files: TRIS, TRB
  • Created Date: Mar 10 1976 12:00AM