RepairUndergroundGeneralAiming for Extended Service Life with Migrating Corrosion Inhibitors
Ray Schallom III, Jessi Meyer, and Julie Holmquist
Read MoreCorrosion of embedded steel reinforcement is a threat to all types of reinforced concrete, leading to cracking, spalling, and a shortened service life of thestructure.
UndergroundUnderground at Mines
Michael Mooney
Read MoreIn 2011, realizing a need to identify a unifying program dedicated to underground construction and tunneling education across campus, Colorado School of Mines established the Center for Underground Construction andTunneling,
RepairUndergroundEast Side Access Project
Frank E. Townsend III
Read MoreIn May 2014, Superior Gunite was issued a subcontract by the Michels Corporation to shoot approximately 2000 yd3 (1500 m3) of shotcrete for overbreak build back on the arches of the East Side Access Project?
UndergroundModeling of Load-Bearing Behavior of Fiber-Reinforced Concrete Tunnel Linings
Axel G. Nitschke
Read MoreThe use of fiber-reinforced concrete (FRC)?with steel or macro-synthetic fibers?has technical and economic advantages that primarily stem from the fact that fibers transform the post-cracking behavior
UndergroundLining Raise-Bore Shafts
Kristian Loevlie
Read MoreWhen raise boring is used, a circular excavation is roduced either between two existing levels in an underground mine or between the surface and anexisting level in a mine.
UndergroundInnovative Shotcrete Technologies for Advancement in Tunneling
Nicolas Ginouse, William Clements, and Scott Rand
Read MoreSprayed concrete (shotcrete) is a well-established and proven component of ground support systems worldwide.
UndergroundNorthern Boulevard Crossing Tunnel CQ039
Frank E. Townsend III
Read MoreThe Northern Boulevard Crossing tunnel is a crucial link for the East Side Access Program inking Long Island Rail Road trains to Grand Central Station, New York City.
RepairUndergroundSociété de transport de Montréal—Metro Yellow Line Tunnel Repairs
Kevin Robertson, Patrick Giguere, and Ntam Nda-Ngye
Read MoreThe Montreal Metro is an underground metro system and the main form of public transportation in the city of Montreal, QC, Canada.
RepairUndergroundStructuralThe Plaza Substation and Queens Structures
Frank E. Townsend III
Read MoreThe Plaza Substation and Queens Structures provide structural and architectural rehabilitation to existing facilities along the existing 63rd St Station and will tie in from Long Island to the East Side Access project
RepairUnderground55th Street Ventilation Facility
Frank E. Townsend III and Dennis Rubi
Read MoreThe 55th Street Ventilation Facility is a critical piece of the Eastside Access Program for the New York Mass Transit Authority.