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soft ground tunneling machine

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

  • Tunnel boring machine — A tunnel boring machine that was used at Yucca Mountain nuclear waste repository A tunnel boring machine (TBM) also known as a mole , is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.… …   Wikipedia

  • 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

  • Architecture and Civil Engineering — ▪ 2009 Introduction Architecture       For Notable Civil Engineering Projects in work or completed in 2008, see Table (Notable Civil Engineering Projects (in work or completed, 2008)).        Beijing was the centre of the world of architecture… …   Universalium

  • Second Avenue Subway — Planned route of the NYC Subway Second Avenue Line ( T , in teal). Overview Type Rapid transit System …   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

  • Engineering Projects — ▪ 1995 Introduction BRIDGES        Notable Engineering Projects(For Notable Engineering Projects in work, see Table (Notable Engineering Projects).)       As the decade of the 1990s reached its midpoint, the limits to bridge design were being… …   Universalium

  • New Austrian Tunnelling method — NATM redirects here. For other uses, see NATM (disambiguation). The New Austrian Tunnelling method (NATM) was developed between 1957 and 1965 in Austria. It was given its name in Salzburg in 1962 to distinguish it from old Austrian tunnelling… …   Wikipedia

  • Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… …   Wikipedia

  • Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   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

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