UndergroundStructuralEmbrittlement of Fiber-Reinforced Shotcrete
E. Stefan Bernard
Read MoreIn underground construction, minimum performance levels for shotcrete with respect to compressive and flexural strength, ductility, and resistance to the environment are usually required to be maintained over the entire design life of a lining.
UndergroundStructuralExpanded Metal Sheet Forming
Edward Hart
Read MoreWhen the Port Authority of Allegheny County decided to build a busway from the Pittsburgh International Airport to downtown Pittsburgh, PA, part of the project incorporated rehabilitating an existing 2900 ft (884 m) tunnel.
UndergroundDevelopment of a Wet-Mix Shotcrete for a Deep Mine
Dan Millette and Michel Lessard
Read MoreIn 2002, an economic study and testing determined that application of wet-mix shotcrete by mechanized application methods permitted substantial gains in cost and in production levels.
Underground2006 Outstanding Underground Project: Weehawken Tunnel and Bergenline Avenue Station
Weehawken Tunnel and Bergenline Avenue Station
Read MoreThe reconstruction of the Weehawken Tunnel for the New Jersey Transit Hudson-Bergen Light Rail System was recently completed.
UndergroundCanada’s North Country
Richard Atkinson and Michael W. Martin
Read MoreThe Canadian mining industry has been experiencing a renaissance recently and part of this is the discovery of diamond deposits in the Northwest Territories.
UndergroundDetermination of Early-Age Compressive Strength for FRS
Stefan Bernard and Christian Geltinger
Read MoreThe strength of the concrete matrix at early ages is an important factor in successful ground control using fiber-reinforced shotcrete (FRS).
UndergroundShotcrete Application in SNOLAB
Satish Bhan, Fraser Duncan, Ian Lawson, and Craig McDonald
Read MoreThe SNOLAB underground science laboratory is situated 6800 ft (2072 m) below ground at the CVRD-Inco Creighton Mine in Sudbury, ON, Canada.
UndergroundExploring the Limits of Shotcrete Loading Capacity at Early Age
Matthew Clements
Read MoreThe booming world mineral market is introducing a new level of challenges to miners
UndergroundWatertight Permanent Shotcrete Linings in Tunneling and Underground Construction
Knut F. Garshol and Lauro Lacerda
Read MoreSprayed concrete, or shotcrete, as is the accepted term in North America, has become an integral part of many traditional, nonmechanized (that is, drill and blast, roadheader) tunnel excavations.
UndergroundInternationalA Report from the ITA Working Group on Shotcrete Use
Tarcisio Celestino and Atsumu Ishida
Read MoreWorking Group 12, Shotcrete Use of the International Tunneling and Underground Space Association (ITA) was established in 1989.