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A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is enclosed except for the portals, 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.
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. Tunnels have many uses: for mining ores, for transportation —including road vehicles, trains, subways, and canals ...
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...
Reading time: 6 minutes. Tunnels are underground constructions used for transportations. The features, advantages, disadvantage and methods of tunneling in construction is discussed. The tunnel engineering is one of the most interesting disciplines in engineering.
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.
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.
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.
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.
Nov 26, 2023 · Uttarakhand Tunnel News Highlights (November 29): The 41 workers who were rescued after a 400-hour operation from the Silkyara tunnel yesterday are currently being kept under observation at AIIMS Rishikesh. The workers were brought to AIIMS-Rishikesh by a Chinook helicopter this afternoon.
Feb 9, 2022 · Atal Tunnel officially recognised as ‘Longest Highway Tunnel above 10,000 feet’ by World Book of Records. Atal Tunnel has officially been certified by World Book of Records, as the ‘World’s Longest Highway Tunnel above 10,000 Feet’, during a landmark ceremony on 09 February 2022, in New Delhi.
