The problems involved in maintaining a satisfactory track on unstable formations, and the remedial measures adopted are considered. In recent years, it has become the practice to remove all overstressed and disturbed materials with the best load spreading properties. The biggest range of problems arises on formation renewal work of the blanketing type. Considerable success has been claimed in America for pressure grouting and driving a pointed "spud" at close spacing into the formation, and filling the holes with sand. In France and in Denmark, blanketing with sand has proved satisfactory. On the Netherlands Railways, fine sand or ashes are used for blanketing clay formations. In Sweden, weak tracks have been strengthened with a continuous mattress of logs laid transversely under the ballast on a blanket of fir tree branches or a layer of fascines. On the Norwegian railways, dried peat has been used as a precaution against frost-heave.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Authors:
    • Toms, A H
    • Beatty, W F
  • Publication Date: 1949-12-16

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Filing Info

  • Accession Number: 00037892
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 4 1994 12:00AM