Installation of nine precast flat-bottom culvert sections broadens application of tunneling method as exemplified by concrete pipe installation under double-track embankment of Terminal Railroad Assn. of St. Louis; sections weigh 9 tons each.
Jack 68-in. pipe under fill
Ry. Eng. Maintenance
Railway Engineering and Maintenance ; 27 , n 5
1931
2 pages
5 Figs.
Article (Journal)
English
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