PoolUndergroundThe Elevated Gam
George Yoggy
Read MoreMaterials scientist and concrete expert George Yoggy has studied the shotcrete and gunite processes for more than 50 years, focusing not only on tunnel and mine construction, but also turning his eye toward watershapes.
RepairUndergroundThird-Rail Safety
Ray Schallom III
Read MoreThere are a few things you should be aware of when working around the third rail of an electric-powered passenger train.
RepairUndergroundStructuralChanging the Traditional Shotcrete Mixture to Suit Underground Applications
Dan Millette
Read MoreConcrete mixtures used in the shotcreting process have traditionally been low-slump mixtures.
RepairUndergroundStructuralLiberty Tunnels Phase 2
Dennis Bittner
Read MoreThe Liberty Tunnels were opened in January 1924.
RepairUndergroundGeneralUsing Accelerators for Shotcreting
Dan Millette
Read MoreAre you shooting overhead and need to build up a 6 in. (154.2 mm) layer in a single pass?
RepairUndergroundStructuralCanada Line Cut and Cover Tunnel Shotcrete Shoring
Roger W. Abbott
Read MoreDriving north from the Fraser River on the 4.3 mi (7 km) corridor of Cambie Street, a main artery into downtown Vancouver, one is oblivious to the fact that up to 72 ft (22 m) below the surface is one of the largest shotcrete shoring
RepairUndergroundStructuralInternationalThe Evolution of Rock Support in One Old Mine in Mexico
Raul Bracamontes
Read MoreAn old mine located in Queretaro State, about a 2-hour drive from Mexico City, now uses wet-mix shotcrete as an integral part of its ground control system.
RepairUndergroundStructuralThe Heartland Corridor Clearance Improvement Project: Vaughan, Roderfield, Laurel, and Gordon Tunnels
2009 Outstanding Underground Project
Read MoreAs part of a 3-year project, Norfolk Southern Railway, which operates 21,500 mi (34,600 km) of track in 22 eastern states, is expanding 28 tunnels along the Heartland Corridor,
RepairUndergroundStructuralThe Heartland Corridor Clearance Improvement
2008 Outstanding Underground Projec
Read MoreWith sky-rocketing fuel costs for truck and air transport, moving freight over national railroads has become increasingly attractive to suppliers and manufacturers.
RepairUndergroundInternationalGeneralFiber-Reinforced Shotcrete in the Australian Underground Mining Industry
E. Stefan Bernard
Read MoreThe majority of underground metalliferous mines in Australia, comprising more than 60 individual mines, now use fiber-reinforced shotcrete (FRS) and bolts as the primary means of ground stabilization.