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Title: EFFECTIVENESS OF VARIOUS SCHEMES IN CONTROLLING THE BEHAVIOR OF CONTINUOUS WELDED RAIL
Accession Number: 00611109
Record Type: Component
Availability: Find a library where document is available Abstract: The effectiveness of the various schemes railroads have used to control the behavior of continuous welded rail (CWR) over the past 15 years is discussed in this paper. Considerations and procedures used in the investigation of train derailments in which track buckling may be a causal factor are addressed, and 16 derailments are reviewed in detail. A pattern of several factors was found that either lowered the neutral rail temperature or materially reduced the lateral stability of the track. These factors were longitudinal rail creep, the chording inward of curves, addition of too much rail, and failure to sufficiently consolidate the ballast after it has been disturbed before trains pass at scheduled speeds. Rail creep may be reduced by adding more rail anchors or reducing train speeds and braking forces until the ballast has been compacted by trains or by mechanical methods. Reference staking under certain conditions will determine if curve chording has taken place and if adjustments will be necessary. After CWR is cut in cool weather, rail adjustments need to be made in order to avoid the addition of rail. After track is disturbed at high temperatures, the ballast must be adequately consolidated before trains are allowed to resume higher speeds. Railroads must have clear instructions on maintenance practices that could result in track buckling and train personnel to understand the application of these instructions.
Supplemental Notes: This paper appears in Transportation Research Record No. 1289, Lateral Track Stability 1991: Proceedings of a Conference, May 15-17, 1990, St. Louis, Missouri. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Lateral track stability 1991: proceedings of a Conference, May 15-17 1990, St Louis, Missouri, USA Monograph Accession #: 01411122
Authors: Ferguson, Max APagination: p. 71-77
Publication Date: 1991
Serial: ISBN: 0309050685
Features: Figures
(1)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Highways; Railroads; Security and Emergencies
Files: TRIS, TRB
Created Date: Jul 31 1991 12:00AM
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