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A platform for research: civil engineering, architecture and urbanism
Tunnelling in hard rock by Swedish method
Success of new methods depended on introduction of cemented tungsten carbide drill steels; rock drill is light weight jackhammer which delivers 2000 to 2300 strokes per min at air pressure of 100 psi; examples of tunneling through solid rock with pneumatic equipment. (See also - v 7 n 12 Dec 1953 p 475-7)
Tunnelling in hard rock by Swedish method
Success of new methods depended on introduction of cemented tungsten carbide drill steels; rock drill is light weight jackhammer which delivers 2000 to 2300 strokes per min at air pressure of 100 psi; examples of tunneling through solid rock with pneumatic equipment. (See also - v 7 n 12 Dec 1953 p 475-7)
Tunnelling in hard rock by Swedish method
Civ Structural Engrs Rev
1954
4 pages
Article (Journal)
English
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