Search results
A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is perfectly enclosed except for the two portals common at each end.
The meaning of TUNNEL is a covered passageway; specifically : a horizontal passageway through or under an obstruction. How to use tunnel in a sentence.
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.
A tunnel is a horizontal passageway located underground. While erosion and other forces of nature can form tunnels, in this article we'll talk about man made tunnels -- tunnels created by the process of excavation.
From subterranean roadways to the network of tubes that form mass transit systems, tunnels are among the most critical pieces of infrastructure that keep our...
Tunnel construction is a subset of underground construction. There are three basic types of tunnel construction in common use: Cut-and-cover tunnel, constructed in a shallow trench and then covered over. Bored tunnel, constructed in situ, without removing the ground above. They are usually of circular or horseshoe cross-section.
Tunnels are generally grouped in four broad categories, depending on the material through which they pass: soft ground, consisting of soil and very weak rock; hard rock; soft rock, such as shale, chalk, and friable sandstone; and subaqueous.
A tunnel is an underground structure which is constructed through the surrounding mass of soil or rock. Typically, a tunnel’s length is much greater than its width. Tunnels are designed to withstand earth forces applied from all sides.
TUNNEL definition: 1. a long passage under or through the ground, especially one made by people: 2. the long passage…. Learn more.
to construct a passageway through or under: to tunnel a mountain. to make or excavate (a tunnel or underground passage): to tunnel a passage under a river. to move or proceed by or as if by boring a tunnel: The river tunneled its way through the mountain. to pierce or hollow out, as with tunnels.
