Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction of two parallel tunnel intakes for Sir Adam Beck-Niagara generating station, each 5 1/2 mi long and 51 ft in diam, under city of Niagara Falls, Canada, required blasting and excavating of 4,375, 000 cu yd of rock; tunnels were driven parallel to each other from five shafts sunk into each tunnel; for top heading face, typical drill round consisted of 159 holes varying in length from 11 to 24 ft.
Construction of two parallel tunnel intakes for Sir Adam Beck-Niagara generating station, each 5 1/2 mi long and 51 ft in diam, under city of Niagara Falls, Canada, required blasting and excavating of 4,375, 000 cu yd of rock; tunnels were driven parallel to each other from five shafts sunk into each tunnel; for top heading face, typical drill round consisted of 159 holes varying in length from 11 to 24 ft.
Driving twin rock tunnels in Ontario
Explosives Engr
Dyment, R. (Autor:in)
Explosives Engineer ; 35
1957
6 pages
Aufsatz (Zeitschrift)
Englisch
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