RepairUndergroundLayers in New York City Overhead Tunnels
Frank E. Townsend III
Read MoreThe New York City Transit (NYCT) Metropolitan Transportation Authority Capital Construction (MTACC) has several largescale projects throughout New York, including one major program: the East Side Access project.
RepairUndergroundStructuralGeneralThe Durability of Shotcrete? Looking Back at Projects from 30 to 40 Years Ago
Ted W. Sofis
Read MoreAnyone who has ever had to remove old gunite from a bridge or an overpass knows how incredibly difficult it can be to tear out.
UndergroundInternationalCadia East Project
Stephen Duffield
Read MoreThe Cadia East Project is delivering what will become the largest underground mine in Australia and one of the largest underground gold mines in the world (Cadia East).
UndergroundConsiderations for Underground Training
William T. Drakeley Jr.
Read MoreThe growing demand for increasingly complex and adaptable urban infrastructure has caused developers to turn an eye to shotcrete as the most economically viable, technically flexible, and structurally sound construction method.
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