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  2. Tunnel construction - Wikipedia

    en.wikipedia.org/wiki/Tunnel_construction

    Tunnel 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.

  3. New Austrian tunneling method - Wikipedia

    en.wikipedia.org/wiki/New_Austrian_tunneling_method

    The new Austrian tunneling method (NATM), also known as the sequential excavation method (SEM) or sprayed concrete lining method [1] (SCL), is a method of modern tunnel design and construction employing sophisticated monitoring to optimize various wall reinforcement techniques based on the type of rock encountered as tunneling progresses.

  4. Analysis of controlled deformation in rocks and soils - Wikipedia

    en.wikipedia.org/wiki/Analysis_of_controlled...

    Drilling of the tunnel face anchors, Val di Sambro Tunnel, Italy. The Analysis of Controlled Deformation in Rocks and Soils, translated from Italian Analisi delle Deformazioni Controllate nelle Rocce e nei Suoli (ADECO-RS), also known as The New Italian Tunneling Method (NITM), [1] is a modern tunnel design and construction approach.

  5. Tunnelling shield - Wikipedia

    en.wikipedia.org/wiki/Tunnelling_shield

    Greathead also used one in the construction of the City and South London Railway (today part of London Underground's Northern line) in 1884, with tunnels 10 feet 2 inches (3.10 m) in diameter. His shield was also used in the driving of the 12 foot 1 + 3 ⁄ 4 inches (3.702 m) diameter running tunnels for the Waterloo & City Railway which opened ...

  6. Channel Tunnel Safety Authority - Wikipedia

    en.wikipedia.org/wiki/Channel_Tunnel_Safety...

    The Channel Tunnel Safety Authority (CTSA) has its origins in article 11 of the Anglo-French Treaty of Canterbury enacted in 1986, while further details were specified with an associated concession agreement. The organisation was created with the specific responsibility for safety in the design, construction, and operation of the Channel Tunnel.

  7. Underground construction - Wikipedia

    en.wikipedia.org/wiki/Underground_construction

    Underground construction has a number of unique risks and challenges but shares a lot with traditional construction and mining. Underground construction workers often work under reduced light condition, in dangerous spaces, and are at a high risk of exposure to contaminants, fire, and explosions.

  8. Head of Gateway rail tunnel project stepping down as real ...

    www.aol.com/head-gateway-rail-tunnel-project...

    Kolluri, who has overseen the bistate agency in charge of the $16 billion Hudson River rail tunnels project, informed the commission's co-chairs, Alicia Glen, Balpreet Grewal-Virk and Tony Coscia ...

  9. Uttarakhand tunnel rescue - Wikipedia

    en.wikipedia.org/wiki/Uttarakhand_tunnel_rescue

    The Silkyara Bend–Barkot tunnel was being constructed by contentious [10] Navayuga Engineering Construction Limited (NECL) under National Highways and Infrastructure Development Corporation Limited (NHIDCL) [11] as part of the Char Dham project, intended to connect important Hindu pilgrim sites in Uttarakhand, North India, with two-lane, all-weather paved roads. [12]

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