Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
New tunnelling achievements reached in driving big Ontario hydro tubes
Twin tunnels, 51 ft diam, each 5.4 mi long driven under Niagara Falls, Ont, for Hydro-Electric Commission of Ontario's new Sir Adam Beck No 2 generating project; finished diam 45 ft with minimum concrete lining 28 in; ventilation by four fans which can put 65,000 cfm into heading; drilling pattern for bench excavation is 4×4 ft grid. (p 64-6, 68, 72-4, 76-7, 80-1)
New tunnelling achievements reached in driving big Ontario hydro tubes
Twin tunnels, 51 ft diam, each 5.4 mi long driven under Niagara Falls, Ont, for Hydro-Electric Commission of Ontario's new Sir Adam Beck No 2 generating project; finished diam 45 ft with minimum concrete lining 28 in; ventilation by four fans which can put 65,000 cfm into heading; drilling pattern for bench excavation is 4×4 ft grid. (p 64-6, 68, 72-4, 76-7, 80-1)
New tunnelling achievements reached in driving big Ontario hydro tubes
Construction Methods Equipment
Richardson, H.W. (Autor:in)
1953
Aufsatz (Zeitschrift)
Englisch
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