cross rail tunnel machine

Tunnels and underground excavations | engineering ...

Tunnels and underground excavations: Tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature's action in dissolving a soluble rock, such as limestone.

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Bechtel: We Build Rail

Journey across the world and visit seven spectacular rail projects that positively transform communities and represent amazing feats of engineering and brilliant career opportunities.

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Hoosac Tunnel - Boudillion

Introduction: The Hoosac Tunnel, a railroad tunnel beneath the Berkshire Mountains in Western Massachusetts, is said to be one of the most haunted places in New England.

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Channel Tunnel - Wikipedia

The Channel Tunnel (French: Le tunnel sous la Manche; also nicknamed the Chunnel) is a 50.45-kilometre (31.35 mi) rail tunnel linking Folkestone, Kent, in the United Kingdom, with Coquelles, Pas-de-Calais, near Calais in northern France, beneath the English Channel at the Strait of Dover.

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Tunnel - Wikipedia

Terminology. A tunnel is relatively long and narrow; the length is often much greater than twice the diameter, although similar shorter excavations can be constructed, such as cross passages between tunnels.

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