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Construction methods used on twin railway tunnels near Pietermaritzburg
Twin tunnels, 100 ft apart, are each 19,760 ft long; tunnels are connected by cross cuts; jumbo used and drill patterns are described; table shows detailed cycle times for rock excavation; description of "Eimco" loader and "Conway" mucker with conveyor belt system; use of special shuttering for lining; method of ventilation after blasting.
Construction methods used on twin railway tunnels near Pietermaritzburg
Twin tunnels, 100 ft apart, are each 19,760 ft long; tunnels are connected by cross cuts; jumbo used and drill patterns are described; table shows detailed cycle times for rock excavation; description of "Eimco" loader and "Conway" mucker with conveyor belt system; use of special shuttering for lining; method of ventilation after blasting.
Construction methods used on twin railway tunnels near Pietermaritzburg
Civ Engr S Africa
Schmidt, N.F.B. (author)
1961
15 pages
Article (Journal)
English
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