When 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.
Development of a Wet-Mix Shotcrete for a Deep Mine
In 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.
2006 Outstanding Underground Project: Weehawken Tunnel and Bergenline Avenue Station
The reconstruction of the Weehawken Tunnel for the New Jersey Transit Hudson-Bergen Light Rail System was recently completed.
Canada’s North Country
The Canadian mining industry has been experiencing a renaissance recently and part of this is the discovery of diamond deposits in the Northwest Territories.
Determination of Early-Age Compressive Strength for FRS
The strength of the concrete matrix at early ages is an important factor in successful ground control using fiber-reinforced shotcrete (FRS).
Shotcrete Application in SNOLAB
The SNOLAB underground science laboratory is situated 6800 ft (2072 m) below ground at the CVRD-Inco Creighton Mine in Sudbury, ON, Canada.
Exploring the Limits of Shotcrete Loading Capacity at Early Age
The booming world mineral market is introducing a new level of challenges to miners
Watertight Permanent Shotcrete Linings in Tunneling and Underground Construction
Sprayed 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.
A Report from the ITA Working Group on Shotcrete Use
Working Group 12, Shotcrete Use of the International Tunneling and Underground Space Association (ITA) was established in 1989.
Repair of the Baltimore Harbor Tunnel
The original construction of the Baltimore Habour Tunnel began in 1955 and was completed in 1957.