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Bookmark or Share- Tunnels and underground excavations | History, Methods, Uses, & Facts ...Tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature’s action in dissolving a soluble rock. Tunnels have many uses: for mining ores, for transportation—including road vehicles, trains, subways, and canals—and for conducting water and sewage.
- Tunnel - WikipediaTunnel in Col du Galibier, France Tunnel in Fort de Mutzig, France Decorated portal to a road tunnel in Guanajuato, Mexico Utility tunnel for heating pipes between Rigshospitalet and Amagerværket in Copenhagen, Denmark Tunnel on the Taipei Metro in Taiwan Southern portal of the 421 m long (1,381 ft) Chirk canal tunnel, Wales. A tunnel is an underground or undersea passageway.
- The World's 20 Most Impressive Tunnels - Popular MechanicsInfrastructure & Transportation. The World's 20 Most Impressive Tunnels. If there's no straight line from A to B, then make one. By Tim Newcomb Published: Apr 7, 2016. Save Article. Tunnels...
- How Tunnels Work | HowStuffWorksHow Subways Work. How Bridges Work. Discover.com Transatlantic Tunnel. At its most basic, a tunnel is a tube hollowed through soil or stone. Constructing a tunnel, however, is one of the most complex challenges in the field of civil engineering.
- Tunnel construction - WikipediaTunnel Construction. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use ...
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