In my last column, I discussed the need for early strength testing in underground shotcrete…
How Do You Recruit for an Invisible Job?
You can be working on a large-scale, technically challenging, resource-consuming project … and if it goes well, people will not even know you’re there. Herein lies one of the struggles the tunneling industry faces: If people aren’t aware the projects exist, they also don’t know there are jobs available…
Traffic Repairs Using Low-Dust Shotcrete Material: Monitor-Merrimac Tunnel Project
Historically, the dust associated with dry-mix shotcreting caused hesitation in projects in urban or live traffic environments; however, recent innovations in low-dust materials have significantly changed planning considerations…
Shotcrete Placement for Initial Support: Climate Pledge Arena Tunnel Project
The Washington State Coliseum was an arena built for the 1962 Seattle World’s Fair. More than half a century later, in 2019, a $1B construction program began to redevelop and expand the arena. The redeveloped building, with a new name — Climate Pledge Arena — retains the historical roof, but below the surface is another story…
Shotcrete as Final Liner — Design Considerations
The use of shotcrete placement (often called sprayed concrete) for the final permanent structural lining of underground structures and facilities continues to increase around the world. Where non-uniform shapes are required, shotcreting provides…
Shotcrete Contractor and Crew Qualifications (ASA Board)
#4 – Mechanical Application of Shotcrete in Underground Construction
#3 – Encapsulation of Reinforcement in Tunnel Shotcrete Final Linings
Outstanding Underground Project
Initial and Final Shotcrete Linings for Edouard Montpetit Station of REM Project – 2024 Honorable Mention Project
R.seau Express M.tropolitain (REM) is an automated (driverless) light-rail transit (LRT) system in Montreal, Canada. It features 67 km (42 mi) of double tracks and 26 stations. Once completed, it will be the 4th longest automated LRT transportation system in the world.