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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
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
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 - 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
Tunneling - Geoengineer. org 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