Tunnel - Construction

Construction

Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management.

There are three basic types of tunnel construction in common use:

  • Cut and cover tunnels, constructed in a shallow trench and then covered over.
  • Bored tunnels, constructed in situ, without removing the ground above. They are usually of circular or horseshoe cross-section.
  • Immersed tube tunnels, sunk into a body of water and sit on, or are buried just under, its bed.

Read more about this topic:  Tunnel

Other articles related to "construction":

Transport - Thessaloniki Metro
... Main article Thessaloniki Metro The construction of the Thessaloniki Metropolitan Railway began in 2006 and is scheduled for completion in late 2014, where ... towards the airport, the Attiko Metro company is considering the construction of an overground network or a monorail ... to Kalamaria, a southeast borough of Thessaloniki, has already become part of the initial construction phase, while future expansions are considered and planned for Efkarpia to ...
Queen Elizabeth Hospital Birmingham - New Hospital - Planning and Construction
... urban regeneration plan for Bournbrook and Selly Oak which includes the construction of a £350 million retail development and the construction of the Selly Oak bypass ... The hospital was designed by BDP Architects and construction, which was undertaken by Balfour Beatty, began in June 2006 ... Five Liebherr 280 EC tower cranes supplied by Balfour Beatty Civil Construction Plant Services (BBCCPS) were used during construction ...
USS George Washington (SSBN-598) - Construction and Launching
... During construction, she was lengthened by the insertion of a 130 ft (40 m)-long ballistic missile section and renamed George Washington another submarine under construction at the ...
Valle De Los Caídos - Controversy
... the Risco de la Nava was undertaken by San Roman, an affiliate of the incumbent construction company Agroman ... conviction redemption for risking their lives working on the monument construction.. ... According to the official programme records, 2,643 workers participated directly in the construction, some of them highly skilled, as required by the complexity of the work ...
Xá Lợi Pagoda - History - Construction
... Construction began on 5 August 1956, according to the plans drawn up by the architects Trần Văn Đường and Đỗ Bá Vinh, while the directing engineers were Dư Ngọc Ánh and Hồ T ...

Famous quotes containing the word construction:

    No real “vital” character in fiction is altogether a conscious construction of the author. On the contrary, it may be a sort of parasitic growth upon the author’s personality, developing by internal necessity as much as by external addition.
    —T.S. (Thomas Stearns)

    Striving toward a goal puts a more pleasing construction on our advance toward death.
    Mason Cooley (b. 1927)

    No construction stiff working overtime takes more stress and straining than we did just to stay high.
    Gus Van Sant, U.S. screenwriter and director, and Dan Yost. Bob Hughes (Matt Dillon)