id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
42149	Hewett, Bertram Henry Majendie	Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The North River Tunnels. Paper No. 1155			.txt	text/plain	72036	6959	93	the rock from the tunnels made it necessary to start the shield-driven kinds of ground through which the shield-driven tunnels had to pass. time were much taken up with the progress of the shield-driven tunnels. TABLE 6.--ROCK TUNNEL EXCAVATION UNDER 32D STREET, EAST OF CUT-AND-COVER iron-lined tunnels and the shield chambers. iron-lined pieces of tunnel placed side by side, with semi-circular [Illustration: TYPES OF CONCRETE LINING OF SHIELD-DRIVEN TUNNELS. _Standard Cross-Section of Concrete Lining of Shield-Driven _Standard Cross-Section of Concrete Lining of Shield-Driven and the working faces, extending the pipe lines, and attending to shield of the tunnel with bolting and working platform is shown on Plate XL. TABLE 27.--SHIELD-DRIVEN TUNNEL WORK, WEEHAWKEN SHAFT, RIVER TUNNEL TABLE 27.--SHIELD-DRIVEN TUNNEL WORK, WEEHAWKEN SHAFT, RIVER TUNNEL TABLE 28.--SHIELD-DRIVEN TUNNEL WORK.--TOTAL NUMBER OF RINGS ERECTED AND TABLE 29.--MONTHLY PROGRESS OF SHIELD-DRIVEN TUNNEL WORK. down and re-erected before the concrete work in the river tunnels was	./cache/42149.txt	./txt/42149.txt