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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
- 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 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
- San Diego Sector Border Patrol uncovers sophisticated cross-border drug . . .
The uncompleted tunnel extended more than 1,000 feet inside the U S and was highly sophisticated In early April, Border Patrol agents assigned to the San Diego Sector Tunnel Team discovered the tunnel as it was actively under construction The Tunnel Team made entry into the tunnel, which ran under a portion of the Otay Mesa Port of Entry
- 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 | 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 - 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"
- What does Tunnel mean? - Definitions. net
A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods
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