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.
Ballast and Subgrade Requirements Study: Railroad Track Substructure - Materials Evaluation and Stabilization Practices
1983
388 pages
Report
No indication
English
Review of research on railroad ballast as track substructure
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