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Maintenance of Way and Structures

Maintenance of Way and Structures


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...track the creeping occurs in the direction of the heaviest traffic. The effects of creeping rails are: (1) The skewing of the joint-ties where the splice-bars extend below the base of rail or are slot-spiked to the ties. These are pulled ahead on one end, making a long span for the rail on one side of the joint and bunching the ties on the other side of the joint. A condition of this kind is shown in Fig. 92. (2) Expansion spaces between the ends of rails are closed up so that when the rails expand they will bend laterally or vertically. Driving back the rails to get expansion spaces must often be resorted to when this occurs. (3) Crossing frogs are pushed out of line. At double-track crossings the trouble is doubled, as the frogs on each track arc pushed in opposite directions. (4) Switches, movablepoint frogs, interlocking fixtures, and draw-bridges are jammed and rendered inoperative. In some cases creeping is so bad that it is necessary to use compensating switch-points to take up the movement. Across the muskegs of Canada creeping is very severe. Prior to 1904 a section of track of the Lehigh and Hudson River Railroad across constantly wet meadows between Sand Hill, N. J., and Verona, laid with 65-lb. rails, was observed to creep as much as 13 ft. in one week. The movement of an individual rail under a heavy train was as much as in. In 1904, 80-lb. rails were laid and in 1909 these were renewed with 100-lb. rails. The wave motion of the entire fill due to the passage of a train was shown by the astonishing fact that during the three months between the time the 100lb. rails were unloaded alongside the track and the time they were laid, these rails showed a pronounced tendency to move along the top of the fill in the direction opposite to heaviest traffi...


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Product Details
  • ISBN-13: 9781130512045
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 154
  • Spine Width: 8 mm
  • Width: 189 mm
  • ISBN-10: 1130512045
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 286 gr


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