A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Precast tunnel segments are biggest ever
Vehicular tunnel under St. Lawrence River at Montreal, Que, includes seven precast and prestressed concrete segments, each one covering acre of river bottom; three-celled precast units are 120×360 ft and about 26 ft high; cofferdam was built that extends over half mile into north channel of river and forms drydock; 32,000 ton prestressed segments were floated in drydock; after drydockwall was blasted out, sections were towed into river; triple priming system was used to insure underwater blast which removed drydock wall. (see also Eng and Contract Rec v 78 n 7 July 1965 p 58-64)
Precast tunnel segments are biggest ever
Vehicular tunnel under St. Lawrence River at Montreal, Que, includes seven precast and prestressed concrete segments, each one covering acre of river bottom; three-celled precast units are 120×360 ft and about 26 ft high; cofferdam was built that extends over half mile into north channel of river and forms drydock; 32,000 ton prestressed segments were floated in drydock; after drydockwall was blasted out, sections were towed into river; triple priming system was used to insure underwater blast which removed drydock wall. (see also Eng and Contract Rec v 78 n 7 July 1965 p 58-64)
Precast tunnel segments are biggest ever
Eng News-Rec
Engineering News-Record ; 175
1965
3 pages
Report
English
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Precast tunnel segments are biggest ever
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