tunneling in soft ground

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• 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

• Kanmon Tunnel — ▪ tunnel, Japan       world s first under ocean tunnel (tunnels and underground excavations), stretching 2.25 miles (about 3.5 km) between the islands of Honshu and Kyushu in Japan. During its construction (1936–44), nearly every known tunneling… …   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

• 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

• 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

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

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

• 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

• 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

• Michels Corporation — is an international utility, engineering, design and construction contractor based in Brownsville, Wisconsin. With more than 4,500 employees in its 15 divisions and subsidiaries, Michels is the largest construction company in Wisconsin. It… …   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