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Liner-Plate Tunnels on the Chicago (Il) Subway
The initial subway system designed for Chicago, Ill., includes two routes, one call ed the State Street route and the other known as the Dearborn Street route. The locations of these two routes with reference to the lake shore and the Loop District are shown in Fig. 1. Each route consists of station sections which are connected with each other by a double tube. Each tube has a clear width of 15 ft and a cl ear height of 15 ft. The bottom of the tubes is approximately 50 ft below the street surface. Between about 15 ft and 60 ft below the street surface, the soil consists of blue clay, the consistency of which ranges between stiff and very soft . The system comprises a total of 7.7 mil es of double tubes and station sections. Of this total, 5.7 miles have been constructed by the light liner-plate method and 2.0 miles by the u se of shields. In both types of tunnels an air pressure of about 12 lb per sq. in. in excess of atmospheric pressure was maintained.
Liner-Plate Tunnels on the Chicago (Il) Subway
The initial subway system designed for Chicago, Ill., includes two routes, one call ed the State Street route and the other known as the Dearborn Street route. The locations of these two routes with reference to the lake shore and the Loop District are shown in Fig. 1. Each route consists of station sections which are connected with each other by a double tube. Each tube has a clear width of 15 ft and a cl ear height of 15 ft. The bottom of the tubes is approximately 50 ft below the street surface. Between about 15 ft and 60 ft below the street surface, the soil consists of blue clay, the consistency of which ranges between stiff and very soft . The system comprises a total of 7.7 mil es of double tubes and station sections. Of this total, 5.7 miles have been constructed by the light liner-plate method and 2.0 miles by the u se of shields. In both types of tunnels an air pressure of about 12 lb per sq. in. in excess of atmospheric pressure was maintained.
Liner-Plate Tunnels on the Chicago (Il) Subway
Terzaghi, Karl (author)
Transactions of the American Society of Civil Engineers ; 108 ; 970-1007
2021-01-01
381943-01-01 pages
Article (Journal)
Electronic Resource
Unknown
Shield tunnels for Chicago subway
| Engineering Index Backfile | 1942
| Engineering Index Backfile | 1939
| Engineering Index Backfile | 1940