Identifier: architectenginee6220sanf (find matches)
Title: Architect and engineer
Year: 1905 (1900s)
Authors:
Subjects: Architecture Architecture Architecture Building
Publisher: San Francisco : Architect and Engineer, Inc
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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from being actu-ally realized. Divested of all technical details and terms, my subac;ueous bridgecrossing consists merely in lowering a -previously built tube into place,either right on the bottom of the waterway or raised above the liottom onpiers. It is the simplest, the most effective, the most cheaj^h- maintainedand least expensive water crossing. My plans are for a concrete tube, made in sections ashore, as we buildconcrete ships. Sections about three hundred feet long are the more easilyhandled. They are square, large enough for a double track i:)rovision beingmade for drain and ventilating pipes, electric wires, etc. Each section hasa temporary bulkhead at the ends and is launched as you would a ship, andtowed to the point where it is to be sunk in a trench ):)re^■ionsly dredged.or on piers built in place. To sink the tube section the bulkheads are knocked out. The waterfills the tube, and it sinks, directed by divers, into its proper )ilace. The 94 THE ARCHITECT AXD ENGINEER
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