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Stornorrfors: milestone in rock excavation history
Swedish project requires 2.2 million cu yd of underground rock excavation; in driving 1720 sq ft top heading of 51×85 ft high tailrace tunnel, tunnelers using one-man pusher-leg drills removed average of 38,100 cu ft of rock per day over full length of 2.5 mi heading; description of hydroelectric plant, discharge tunnel, tailrace and penstocks.
Stornorrfors: milestone in rock excavation history
Swedish project requires 2.2 million cu yd of underground rock excavation; in driving 1720 sq ft top heading of 51×85 ft high tailrace tunnel, tunnelers using one-man pusher-leg drills removed average of 38,100 cu ft of rock per day over full length of 2.5 mi heading; description of hydroelectric plant, discharge tunnel, tailrace and penstocks.
Stornorrfors: milestone in rock excavation history
Eng News-Rec
Goransson, T. (author)
Engineering News-Record ; 160
1958
3 pages
Article (Journal)
English
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Rock foundation trench excavation device and excavation method
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