Chicago : Engineering and Contracting Pub. Co. · leaf 264
nly, leaving the 14-in.valves on all the light ones open at all times,thus giving a continuous opening through twosections of tubes between two heavy bulk-heads. The 13-in. valves on all heavy bulk-heads were closed by the divers directly afterthe tubes were sunk. With this arrangementit was… … Fig. 7—Forms for Lining Steel Tubes with Concrete. sidered in connection with the hydrostaticpressure, found to be about 30 lbs. per sq. in.at the bottom of the tubes. Back-Fill.—The work of back-filling thetrench outside the sheathing was started im-mediately after two sections of tubes hadbeen…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
