UndergroundPedestrian Tunnel at Billy Bishop Toronto City Airport
Matt Croutch
Read MoreIn early 2012, construction began on an underwater pedestrian tunnel that will link Billy Bishop Toronto City Airport to the mainland in Toronto, ON, Canada.
UndergroundGeneralUltra Rapid Strength Development in Dry-Mix Shotcrete for Ultra Rapid Support in Challenging Mining Conditions
Jean-Daniel Lemay, Marc Jolin, and Richard Gagné
Read MoreRecent developments in the field of cementing materials have brought forward many nontraditional binder systems.
UndergroundGeneralEFNARC Nozzleman Certification Scheme
Dan Millette
Read MoreEFNARC was an acronym for European Federation of National Associations Representing producers and applicators of specialist building products for Concrete,? which was founded by the European concrete industry in 1989.
RepairUndergroundVariability of Compressive Strength of Shotcrete in a Tunnel-Lining Project
Lihe (John) Zhang
Read MoreRecently, questions have been asked by the International Tunnelling and Underground Space Association (ITA) about what variability can be expected for compressive strength for shotcrete (sprayed concrete) in ground support projects.
RepairUndergroundGeneralShotcreting on Frozen Ground
Paul H. Madsen
Read MoreThe Northern Boulevard Crossing (NBX) is the keystone portion of the massive multi-billion-dollar East Side Access (ESA) Programme by the Metropolitan Transit Authority Capital Construction (MTACC) to bring Long Island trains into and out of New York City’s Grand Central Terminal.
UndergroundGeneralFallouts Can Be Deadly!
Joe Hutter
Read MoreMany years ago, when the use of shotcrete in an underground support system was not as popular as it is today, I witnessed a mine foreman walk into an underground opening to admire the job his shotcrete crew had done placing shotcrete only an hour
UndergroundGeneralThe Use of Shotcrete for Construction of Backfill Barricades in Mining Environments
Craig McDonald and Joe Hutter
Read MoreAs we all know, the mining process is essentially the excavation and extraction of rock, ore, gems, or other minerals from the earth?s surface.
UndergroundStructuralBriardale Gardens
John Andersen
Read MoreWith a population of over 8.17 million people, the city of London, England, continues to grow.
UndergroundHagerbach Underground Test Gallery
Dan Millette
Read MoreA world-class facility, the Hagerbach underground test gallery is located in Flums, Switzerland.
UndergroundInternationalJob Report on Hydropower Station in Stanzertal, Austria
Sascha Schreiner
Read MoreIt is remarkable that three different tunnelbuilding methods are being used on this hydropower station construction site: excavator, drill and blast, and tunnel boring machine (TBM) advancement.