At the time of its construction, the widest underwater tunnel in the world, the Fort McHenry Tunnel in Baltimore, MD, was opened to traffic in 1985.
Rapid-Setting Cement in Shotcrete
Evolving technology in the shotcrete industry using a rapid-setting mixture with calcium sulfoaluminate (CSA) cement in lieu of a more common portland cement mixture is helping to meet the challenges for shotcrete repairs and underground projects throughout the world.
Soudan Mine Shaft Rehabilitation
The Soudan Mine is a historic taconite and iron ore mine in Northeastern Minnesota.
Shotcrete Work in Confined Space Area
Shotcrete work, by its very nature, provides an excellent method of installing concrete materials in storage bins, hoppers, culverts, inlets, vaults, tanks, and other areas, where it is difficult to transport and efficiently install materials by conventional casting methods.
The Outstanding International Project
The Outstanding Underground Project
Underground Shotcrete Roof Repair of Hanging Lake Tunnel
During a Federal Highway Administration annual safety inspection in March 2007, a crack was found in the flat roof portion of the cut and cover section of the Hanging Lake Tunnels along Interstate 70 in Glenwood Springs, CO.
Crane and Other Equipment Savings or Elimination
An often overlooked sustainability benefit of the shotcrete process is one of the most basic of construction problems: the conveying and handling of materials.
Chetoogeta Mountain W&A Railroad Tunnel
Historical restoration/preservation is not only a challenging field of construction but also one that offers the special reward of preserving history for future generations,
The Influence of Reinforcement on Relative Creep Deformations in Shotcrete Linings
Shotcrete is now widely used for ground control in underground mining and civil tunnel construction throughout the world.