Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
East Delaware tunnel: gallery of up-to-date tunneling techniques
Tunnel is 25 mi long, 11 ft 4 in. in diam; where roof bolting is used only 15% of steel that would have been required for arch rib ground support is required; hydraulic jumbo used features motor or hand pump operation of hydraulic jibs; illustrated description of drilling and roof bolting; 1000-ft long car facilitates laying tunnel invert concrete continuously at 1000 ft per day.
East Delaware tunnel: gallery of up-to-date tunneling techniques
Tunnel is 25 mi long, 11 ft 4 in. in diam; where roof bolting is used only 15% of steel that would have been required for arch rib ground support is required; hydraulic jumbo used features motor or hand pump operation of hydraulic jibs; illustrated description of drilling and roof bolting; 1000-ft long car facilitates laying tunnel invert concrete continuously at 1000 ft per day.
East Delaware tunnel: gallery of up-to-date tunneling techniques
Eng News-Rec
Engineering News-Record ; 150
1953
2 pages
Aufsatz (Zeitschrift)
Englisch
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