Chicago : Engineering and Contracting Pub. Co. · leaf 80
materials is of equalimportance with rapid drilling and blasting.In the Arlberg, to keep pace with the miners.900 tons of excavated material had to be re-moved, and 350 tons of masonry to be intro-duced, daily, at each end of the tunnels, whichnecessitated the passage of 450 cars. Thistraffic was… … Fig. 5—Standard Section of Tunnel. pheres, the stored-up heat in the water fur-nished the necessary power. The cost perlinear yard varied according to the thicknessof masonry lining and the distance from themouth of the tunnel. For the first 100 yds.from the entrance the prices per linear yardwere…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
