A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Air places explosives in Carolina tunnels
New blasting technique used in construction of tunnels which are part of 2.7-mi long extension of scenic Blue Ridge Parkway in Great Smoky Mountains, NC, consists in pneumatic placement of explosives in drill holes; procedure involves loading ammonium nitrate into portable air tank and blowing it into drill through specially constructed plastic hose; tunnels are 560 and 440 ft long arch shaped in cross-section, with inside measurements of 30 ft from sidewall to sidewall at roadway and 18 ft from roadway to crown; drilling operations, blasting procedure, and arched steel bracing of tunnel are described.
Air places explosives in Carolina tunnels
New blasting technique used in construction of tunnels which are part of 2.7-mi long extension of scenic Blue Ridge Parkway in Great Smoky Mountains, NC, consists in pneumatic placement of explosives in drill holes; procedure involves loading ammonium nitrate into portable air tank and blowing it into drill through specially constructed plastic hose; tunnels are 560 and 440 ft long arch shaped in cross-section, with inside measurements of 30 ft from sidewall to sidewall at roadway and 18 ft from roadway to crown; drilling operations, blasting procedure, and arched steel bracing of tunnel are described.
Air places explosives in Carolina tunnels
Eng News-Rec
Engineering News-Record ; 171
1963
3 pages
Article (Journal)
English
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