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The Railroad Engineer's Practice: (English)

The Railroad Engineer's Practice: (English)

          
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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. 1880 edition. Excerpt: ...where a thickness of three feet was given. In railroads along a river bank, where the embankment slopes into the river, the slopes are "pitched" with stone about two feet long, laid upon the slope, at right-angles to it. They should start at the bottom in a trench dug about three feet below the surface of the ground. TUNNELS. A "heading" is first driven. This is about five or six feet high, and as wide as the nature of tlie material will allow. In earth it may only be three feet, while in solid rock it should be of the full width of the tunnel. In earth, it is generally driven at the bottom of the section of the tunnel; in this case chambers are often excavated of the full size at intervals in the heading, and the work prosecuted from each in both directions until they meet. In solid rock, the heading should be at the top of the section of the tunnel, and the enlargement should be carried on as closely to the heading as possible, say within fifty feet, although where machine-drills are used, it may not be possible to keep so close. When the two ends of the tunnel are so near the same level that the difference in their heights is not sufficient to secure a proper fall for drainage, a summit should be made in the tunnel. On the Mont Cenis tunnel a fall of.05 per 100 was considered sufficient, but Mr. B. H. Latrobe recommended.5 per 100. The St. Gothard has.1 per 100; Musconetcong, .15 per 100. "When shafts are sunk for the purpose of accelerating the work by having so many additional faces to work from, they should be filled up on the completion of the tunnel, as they interfere with the ventilation. It is found that the ventilation of the Hoosac tunnel is very bad since completion. It has a shaft in the middle which is left...


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Product Details
  • ISBN-13: 9780217365574
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 18
  • Series Title: English
  • Weight: 54 gr
  • ISBN-10: 0217365574
  • Publisher Date: 01 Jul 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 1 mm
  • Width: 189 mm

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