Transactions of the American Society of Civil Engineers, Vol. Lxviii, Sept. 1910
The book Transactions of the American Society of Civil Engineers, Vol. Lxviii, Sept. 1910 was written by author Brace James H. Here you can read free online of Transactions of the American Society of Civil Engineers, Vol. Lxviii, Sept. 1910 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Transactions of the American Society of Civil Engineers, Vol. Lxviii, Sept. 1910 a good or bad book?
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Muck loaded by hand. 12 ft. Timbered. Drift excavated to full width and bench. Muck loaded by steam shovel. Full-width tunnel timbered for 26 ft. Independently of the main excavation. ======================================================= THREE-TRACK TUNNEL EXCAVATION. When it became evident that the work through the Fifth Avenue sectionwould be extremely slow, shafts were sunk in each street between Sixthand Seventh Avenues. The shafts, as shown on Plate XIV, were located inthe streets, but i...n such a way as to block only half of the roadway. Atthe same time it was decided to construct in open cut about 200 ft. Ofthe Three-Track Tunnel at the west end of the contract in 32d Street, where the rock surface was below the top of the tunnel. It was hopedthat the remainder of the work could be built without opening thestreet, but further investigation showed that this was impracticable, and eventually all the Three-Track Tunnel in 32d Street, except 120 ft. East of the shaft, was built in open cut.
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