- Tunnel - Wikipedia
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
- 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, such as limestone A vertical opening is usually called a shaft
- 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
- 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
- TUNNEL | English meaning - Cambridge Dictionary
TUNNEL definition: 1 a long passage under or through the ground, especially one made by people: 2 the long passage… Learn more
- Tunnel - New World Encyclopedia
In general, tunnels are at least twice as long as they are wide and are completely enclosed on all sides, save for the openings at each end A tunnel may be used by pedestrians, cyclists, motor vehicles, or rail traffic
- Tunnel: Components and Types of Tunnel. - gelogia. com
A tunnel is a horizontal or slightly inclined underground passage Learn about the definition, components, and types of tunnels, including hydraulic and traffic tunnels
- Tunnel - definition of tunnel by The Free Dictionary
Define tunnel tunnel synonyms, tunnel pronunciation, tunnel translation, English dictionary definition of tunnel n 1 An underground or underwater passage 2 A passage through or under a barrier such as a mountain 3 A tube-shaped structure v tun·neled ,
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