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Tunnel - Wikipedia A tunnel is an underground or undersea passageway It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ventilation openings at various points along the length
TUNNEL Definition Meaning - Merriam-Webster The meaning of TUNNEL is a covered passageway; specifically : a horizontal passageway through or under an obstruction How to use tunnel in a sentence
How Tunnels Work - HowStuffWorks In this article, we'll explore what makes tunnels such an attractive solution for railways, roadways, public utilities and telecommunications We'll look at the defining characteristics of tunnels and examine how tunnels are built
tunnels and underground excavations - Encyclopedia Britannica tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature’s action in dissolving a soluble rock, such as limestone A vertical opening is usually called a shaft
Tunnel - definition of tunnel by The Free Dictionary tunnel - a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection"
22 Types of Tunnels – Uses, Advantages Disadvantages . . . Tunnels are counterfeit submerged burrows that are worked without harming the outer layer of the earth The passages are submerged paths utilized for the most part for transport purposes They might be utilized to move cargo and voyagers, water, and disinfection, individually