A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
World's longest double-track tunnel pierces Italian apennines
Concrete-lined two-track tunnel, 11 1/2 mi. long, 29 ft. wide, with mid-tunnel siding enlargement to 56 ft., constructed through loose rock, carrying Florence-Bologna line of Italian state railways across Apennine Mountains at elevation nearly 1000 ft. lower than that of old crossings; sequence of excavating and timbering operations in normal and in squeezing ground; stilling flow jets; method of opening and lining 56-ft. section; cost $24,735,000.
World's longest double-track tunnel pierces Italian apennines
Concrete-lined two-track tunnel, 11 1/2 mi. long, 29 ft. wide, with mid-tunnel siding enlargement to 56 ft., constructed through loose rock, carrying Florence-Bologna line of Italian state railways across Apennine Mountains at elevation nearly 1000 ft. lower than that of old crossings; sequence of excavating and timbering operations in normal and in squeezing ground; stilling flow jets; method of opening and lining 56-ft. section; cost $24,735,000.
World's longest double-track tunnel pierces Italian apennines
Eng. News-Rec
Engineering News-Record ; 107
1931
2 pages
4 Figs.
Article (Journal)
English
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