Technical Reports

Ballast and Subgrade Requirements Study: Railroad Track Substructure – Materials Evaluation and Stabilization Practices

  • 01
  • Jun
  • 1983
AUTHOR: Federal Railroad Administration
OFFICE: RPD
SUBOFFICE: RPD-30
REPORT NUMBER: DOT/FRA/ORD-83/04.1
KEYWORDS: Railroad Track; Ballast; Subgrade; Sub-ballast; Substructure; Field Tests; Laboratory Tests; Performance
ABSTRACT: Earth materials--i.e., soil and rock--form the substructure of all railroad track. In this report, the functions and performance characteristics of each of the substructure elements (i.e., ballast, subballast, and subgrade), and the material properties that influence the substructure performance are described. In addition, guidelines are provided for their use in railroad track.
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