Method used by Pennsylvania Railroad in replacing old timber in 753-ft stone creek tunnel on Marietta branch of Cleveland Division with 12-in. section reinforced by rods and 6-in. H-beam sets without encroaching on clearances.
Reinforced concrete lining used to advantage in old tunnel
Ry Age
Railway Age ; 101 , n 7 ; p 243-245
1936
3 pages
Aufsatz (Zeitschrift)
Englisch
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