A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Methods of excavation and roof support used in some recently constructed tunnels
Correlation of information obtained during personal investigations at four rock tunnels, and information obtained from records and personal views of constructors of two other tunnels not visited during excavation phase of construction; Saltsburg tunnel (Pennsylvania Railroad); Baltimore and Ohio Railroad tunnel; East Branch tunnel; Penn-Lincoln Parkway tunnels; Youghiogheny tunnel; Crooked Creek tunnel.
Methods of excavation and roof support used in some recently constructed tunnels
Correlation of information obtained during personal investigations at four rock tunnels, and information obtained from records and personal views of constructors of two other tunnels not visited during excavation phase of construction; Saltsburg tunnel (Pennsylvania Railroad); Baltimore and Ohio Railroad tunnel; East Branch tunnel; Penn-Lincoln Parkway tunnels; Youghiogheny tunnel; Crooked Creek tunnel.
Methods of excavation and roof support used in some recently constructed tunnels
U S Bur Mines -- Information Cir
Polack, S.P. (author)
1950
14 pages
Supp plates
Report
English
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