Detroit River Railroad Tunnel

tunnel, Canada-United States

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In tunnels and underground excavations: Subaqueous tunnels
…its present form on the Detroit River Railroad Tunnel between Detroit and Windsor, Ontario (1906–10). A prime advantage is the avoidance of high costs and the risks of operating a shield under high air pressure, since work inside the sunken tube is at atmospheric pressure (free air).
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In tunnels and underground excavations: Development of method
…the construction (1906–10) of the Detroit River twin-tube railroad tunnel between Detroit, Mich., and Windsor, Ont., where it was successfully used for the 2,665-foot river-crossing portion. A structural assembly of steel tubes was prefabricated in 262-foot-long sections with both ends temporarily bulkheaded or closed. Each section was then towed out…
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