State Street Tunnel
TOTAL IMMERSED LENGTH: 61 m
DEPTH AT BOTTOM OF STRUCTURE: 15.8 m
HEIGHT: 6.9 m
WIDTH: 12.0
FABRICATION METHOD: In a drydock. Welded construction. Pressurized to 0.5 psi for soap bubble test. 1,000 m³ placed in drydock.
SITE ONDITIONS: river
DEPTH AT BOTTOM OF STRUCTURE: 15.8 m
HEIGHT: 6.9 m
WIDTH: 12.0
FABRICATION METHOD: In a drydock. Welded construction. Pressurized to 0.5 psi for soap bubble test. 1,000 m³ placed in drydock.
SITE ONDITIONS: river
Chicago, Illinois, U.S.A.,
United States
City of Chicago
Merrit-Chapman & Scott Corporation
Department ot Subways and Super Highways
61m
61m
15.8m
Project construction
1942-03-31
1
Two tubes; one track each
6.9m
12.0m
In a drydock. Welded construction. Pressurized to 0.5 psi
for soap bubble test. 1,000 m³ placed in drydock.
for soap bubble test. 1,000 m³ placed in drydock.
At a dock with 6 m of draft available.
Mild currents.
Element hung from under scows by cables fed through wells. Element had to be sunk below scows to attach them.
Tremie concrete.
Continuous steel shell.
Element was landed on tremie concrete pads formed to exact grade; screw jacks on the corners were used to level the element. A screeded bed was provided as well.