Tunnel - Wikipedia
Tunnel 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 …
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.
The $20-Trillion Tunnel That Could Link New York and London
3 天之前 · The Channel Tunnel linking France to the U.K. was built over a six-year period. If the trans-Atlantic tunnel were built at the same speed, it would take 782 years to cross the 3,000 …
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 …
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 …
TUNNEL definition and meaning | Collins English Dictionary
A tunnel is a long passage which has been made under the ground, usually through a hill or under the sea.
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.
Tunnels: Essential Structures in Transportation Infrastructure ...
Tunnels are underground or underwater passages designed to allow transportation through or beneath natural and man-made barriers. Engineers use tunnels in diverse applications, …
Tunnel - New World Encyclopedia
A tunnel is an underground passage. 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 …
tunnel summary | Britannica
tunnel, Horizontal or nearly horizontal underground or underwater passageway. Tunnels are used for mining, as passageways for trains and motor vehicles, for diverting rivers around damsites, …