compressed air tunneling shield

См. также в других словарях:

• tunneling shield — ▪ engineering  machine for driving tunnels in soft ground, especially under rivers or in water bearing strata. The problem of tunneling under a river had defied the engineering imagination for centuries because of the difficulty of preventing mud …   Universalium

• tunnels and underground excavations — ▪ engineering Introduction        Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …   Universalium

• Clyde Tunnel — The south portal of the Clyde Tunnel at Linthouse Official name Clyde Tunnel Carries 4 lanes of the …   Wikipedia

• Tunnel — This article is about underground passages. For other uses, see Tunnel (disambiguation). Underground tunnel for heatpipes between Rigshospitalet and Amagerværket in Denmark …   Wikipedia

• Greathead, James Henry — ▪ British engineer born Aug. 6, 1844, Grahamstown, S.Af. died Oct. 21, 1896, London, Eng.  British civil engineer who improved the tunneling shield, the basic tool of underwater tunneling, essentially to its modern form.       Greathead arrived… …   Universalium

• railroad — /rayl rohd /, n. 1. a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail. 2. an entire system… …   Universalium

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• Kolkata Metro — Infobox Public transit imagesize = 300px name = Kolkata Metro locale = Kolkata, India transit type = Rapid transit began operation = 1984 system length = 16.5 km lines = 2 stations = 17 ridership = track gauge = Broad Gauge operator = Metro… …   Wikipedia

• James Henry Greathead — Infobox Engineer image size = caption = Statue of Greathead in London which was only erected in 1994 name = James Henry Greathead nationality = birth date = 6 August 1844 birth place = Grahamstown, South Africa death date = 21 October1896 death… …   Wikipedia

• Port Authority Trans-Hudson — Coordinates: 40°43′52.74″N 74°3′33.59″W / 40.7313167°N 74.0593306°W / 40.7313167; 74.0593306 …   Wikipedia

• James Henry Greathead — Naissance 6 août 1844 Grahamstown, Afrique du Sud Décès 21 octobre 1896 …   Wikipédia en Français