DETERMINATION OF THE COMPACTING OF BALLAST UNDER SERVICE LOADING BY THE GAMMA ABSORPTION PROCESS

Increased train speed and axle loadings require effective measures to keep maintenance costs and maintenance work on the track within acceptable limits. An important factor in this is a well compacted road bed. The authors describe how the effectiveness of compacting of the road beds performed by the various makes of tamping machines had hitherto been measured by a so-called "water substitution" method. The new gamma absorption method of making this determination of the specific gravity of the compacted ballast bed, and the measuring procedure associated with it, are described. Charts of measurements are given, showing the correlation of this new with the old method. Data as well as theory are included. Information is also given, showing the increase in resistance of the track structure to lateral displacement and longitudinal creep from a well compacted ballast bed.

• Corporate Authors:

  Hestra Verlag

  Holzhofallee 33, Postfach 4244
  6100 Darmstadt 1,   Germany 
• Authors:
  • Birmann, F
  • Cabos, P
• Publication Date: 1965-1

Media Info

• Features: Figures; References;
• Pagination: p. 59-69
• Serial:
  • Eisenbahntechnische Rundschau
  • Volume: 14
  • Issue Number: 1-2
  • Publisher: Hestra Verlag

Subject/Index Terms

• TRT Terms: Compaction; Creep; Maintenance of way; Nondestructive tests; Rail (Railroads); Soil compaction; Subgrade (Pavements); Technology
• Uncontrolled Terms: Lateral loads
• Geographic Terms: Germany
• Old TRIS Terms: Gamma ray inspection; Rail creep
• Subject Areas: Geotechnology; Railroads;

Filing Info

• Accession Number: 00037619
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM