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Highway burrows beneath subway tracks
Construction of final section of six lane Schuylkill Expressway in Philadelphia; expressway passes under Broad Street and two-track subway in 46 ft depth under street level; installation of temporary and permanent supports for subway roof, 7 ft of fill above roof, and live loads of street traffic; expressway section is flanked by concrete retaining walls.
Highway burrows beneath subway tracks
Construction of final section of six lane Schuylkill Expressway in Philadelphia; expressway passes under Broad Street and two-track subway in 46 ft depth under street level; installation of temporary and permanent supports for subway roof, 7 ft of fill above roof, and live loads of street traffic; expressway section is flanked by concrete retaining walls.
Highway burrows beneath subway tracks
Eng News -- Rec
Engineering News-Record ; 165
1960
3 pages
Article (Journal)
English
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