Earth materials - i.e., soil and rock - form the substructure (ballast, subballast, and subgrade) of all railroad track. In this report, the most suitable technology and design criteria as related to design of the substructure are identified based on a review of current track substructure design procedures employed in the United States and foreign countries. A primary emphasis has been placed on identifying an approach for rational design of track to support vertical, lateral, and longitudinal loads. Principal design parameters and available analytic and empirical design procedures are discussed.


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    Title :

    Ballast and Subgrade Requirements Study: Railroad Track Substructure - Design and Performance Practices


    Contributors:

    Publication date :

    1983


    Size :

    178 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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