A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Change in line of Norfolk and Western Railroad in West Virginia required construction of double track tunnel 7135 ft long, 36 ft wide, and 38 ft high; it will be concreted, 18 in. thick over steel supports; jumbo is 3-deck working platform which permits 35 workmen on 15 pneumatic drills to drill rock ahead; tunnel excavation required 60% Gelatin Extra, 1 1/2-in. by 8-in.
Change in line of Norfolk and Western Railroad in West Virginia required construction of double track tunnel 7135 ft long, 36 ft wide, and 38 ft high; it will be concreted, 18 in. thick over steel supports; jumbo is 3-deck working platform which permits 35 workmen on 15 pneumatic drills to drill rock ahead; tunnel excavation required 60% Gelatin Extra, 1 1/2-in. by 8-in.
Twelve-million-dollar short cut
Explosives Engr
Counts, R.H. (author)
Explosives Engineer ; 27
1949
4 pages
Article (Journal)
English
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