UndergroundFlood Control Channels Made with Shotcrete
Raúl Bracamontes
Read MoreFlooding is a temporary overflow of water onto land that is normally dry. Floods are the most common natural disaster in the United States.
UndergroundStructuralStructural Modifications to Hydroelectric Turbine Draft Tube Ceiling
Shaun M. Radomski, Dudley R. (Rusty) Morgan, Lihe (John) Zhang, and David Graham
Read MoreThe U.S. Army Corps of Engineers (USACE) is engaged in structural modifications to the reinforced concrete draft tube exits from the turbines in the Ice Harbor Lock and Dam located on the Snake River near Burbank, WA.
UndergroundTunnel Shotcrete Lining for Hydroelectric Projects
Lihe (John) Zhang, Dudley R. (Rusty) Morgan, Serge Moalli, David Gagnon, and Danny Dugas
Read MoreIn British Columbia (BC), Canada, the primary source of power supply is hydroelectricity.
UndergroundOverhead Shooting against PVC Membrane
Frank E. Townsend III and Dennis Rubi
Read MoreOverhead shotcrete application against any substrate is challenging. Shooting against a polyvinyl chloride (PVC) membrane waterproofing system increases the difficulty and danger of the process.
RepairUndergroundCreating a Foundation for Success: The Use of Lidar in Tunneling Projects
Carlos Gonzalez
Read MoreShotcrete placement requires close attention to safety; when combined with the difficult working conditions of a tunnel, overhead placement requires even greaterawareness of potential hazards.
UndergroundStructuralShotcrete Lining Innovations in the United States
Andy Thompson and Frank E. Townsend III
Read MoreHistorically, the permanent concrete linings for underground structures have been installed using form-and-pour methods but the use of shotcrete or sprayed concrete for the structural linings is becoming increasingly more common.
RepairUndergroundShotcrete Use in the Gold King Mine Rehabilitation
Christoph Goss
Read MoreThe Gold King Mine Level 7 Portal is located at elevation 11,438 ft (3486 m) on the North Fork of Cement Creek, approximately 8 miles (13 km) north of Silverton, CO.
RepairUndergroundShotcreting the East Side Access Program
Frank E. Townsend III
Read MorePrior to 9/11, all structural wall and tunnel concrete applications in New York, NY, used the form-and-pour concrete placement method.
RepairUndergroundSimple Still Works
John Becker
Read MoreCoastal Gunite Construction recently executed a few phases of a storm sewer rehabilitation in a line running under the Blue Plains Advanced Wastewater Treatment Plant operated by the District of Columbia Waterand Sewer Authority.
UndergroundTowards Automated Concrete Spraying
Lauro Lacerda and Marjo Koivisto
Read MoreOperating a remotely manipulated shotcrete placing system is one of the most demanding tasks in underground mining and tunnel construction.