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.
Anderson Dam Tunnel – 2024 Outstanding Underground Project
Drill Tech Drilling & Shoring, Inc. performed Sequential Excavation Method (SEM) tunnel construction with geometric cross sections consisting of 19 ft to 24 ft (5.6 to 7.3 m) diameter tunnels (including wide span intersections) for the Anderson Dam Tunnel Project.
Relieving Water Pressure on Shotcrete Lining by Integrating a Drainage Mesh
Underground construction, especially a tunnel, is one of the most complex challenges in the field of civil engineering. Dolenco Drain is an innovative solution which addresses many of the difficulties with controlling or eliminating water pressure in an easy, safe, long-term, and cost-effective manner.