Underground Tunnel Transportation Projects In US And World?
November 14, 2012 in Science
New York to UK
“Trans-Atlantic tunnel is a theoretical tunnel under the Atlantic between Europe (London) and North America (New York), so the two continents together to connect. The tunnel would use magnetic levitation trains. With advanced technologies, it speeds will be from 500 to 8.000 km/h. Plans for a tunnel as they are never touched the conceptual phase, and no one currently pursues this project. The most common route is that between the United States and the United Kingdom, or, more specifically, New York and London. The main obstacles to building such a tunnel are the costs – possibly $12 trillion – and the limits of current knowledge of materials.”
“Most of the tunneling industry knows that Seattle will soon be the home of the largest shield-driven tunnel in the world with startup of the 57.5 ft diameter earth pressure balance machine on the Alaskan Way Viaduct (SR 99) Tunnel in 2013. However, this will be only the second largest soil tunnel in Seattle. The largest soil tunnel in Seattle, and reportedly in the world, was built in the mid 1980s as a double-deck, five-lane highway tunnel on Interstate 90. The tunnel passes beneath a 300-ft high north-south ridge along the east side of downtown Seattle, and portals to the east onto one of the three floating bridges that cross Lake Washington. The need for eight to 12 lanes of freeway capacity across Mercer Island, Lake Washington and into downtown Seattle and merging with Interstate 5 was conceived by the Washington State Department of Transportation (WSDOT) in the 1960s.”
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