Western Architect and Engineer Volume 8

Western Architect and Engineer Volume 8

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...in general arrangement a few features of such tunnel construction, particularly one of the fore bays or intakes. Gate, pump and piping equipments are not shown. On sheet No. 2 is shown a tunnel bore of 12 feet 2 inches. This diameter applied to the entire tunnel shown on sheet No. 1, plus pits, manholes, approaches and reservoirs, shows a total yardage of 225,280, and the cost of such tunnel complete may be estimated at $5.00 per cubic vard, or $1,126,400. The tunnels completed, including a general pipe distribution to reservoirs at high elevation, pumps therefor, and of unit connections thereto, such units ranging from a single large pumping station to a single large reservoir, down to unit deep well pumps at manholes, will cost on completion, less than $5,000,000, and will be an effective factor in preventing conflagration upon an expenditure of one-half that amount. The tunnel contour shown is for a self-supporting section in unstable ground. This contour to be contracted to a six-inch shell of slightly reinforced concrete, where the soil or rock encountered permits it. In passing it may be stated that the tunnel is to accommodate a depth of four feet of water at low tide. It is not proposed to make the construction of greater strength than that required by the load, for in case of an earthquake its location subterranean affords considerable protection, and so long as there is a city above it will perform its functions of leading water where required. Earthquake shocks might divide it into any number of parts, but the sea would traverse these parts about as well as when the tunnel was intact. To imagine this water supply entirely cut off, would include an engulfing of the territory in which it was built, and consequent thereon, an end...
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Product details

  • Paperback | 122 pages
  • 189 x 246 x 7mm | 231g
  • United States
  • English
  • black & white illustrations
  • 1236993632
  • 9781236993632