An important part of the Northeast Corridor Improvement Project was the installation of more than 400 track-miles of concrete tie track. Since installation, minor problems with track components have been discovered. These problems have included clip fallout, loose inserts, broken insulators and cracked ties. A cooperative investigation was conducted by Amtrak and DOT/FRA, contracting with Battelle's Columbus Laboratories. The primary cause of tie cracking was determined to be high vertical impact loads caused by a few rough wheel profiles on high-speed passenger cars. To improve track performance, remedial projects were initiated by Amtrak. These included the development of a wayside wheel impact load detector to identify specific impact-producing wheelsets. In addition, field tests of more resilient tie pads and a different rail clip design were begun.


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    Titel :

    Development of Safety Criteria for Evaluating Concrete Tie Track in the Northeast Corridor. Volume 1. Remedial Projects Assessment


    Beteiligte:
    D. R. Ahlbeck (Autor:in) / J. M. Tuten (Autor:in) / J. A. Hadden (Autor:in) / H. D. Harrison (Autor:in)

    Erscheinungsdatum :

    1986


    Format / Umfang :

    120 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch