NATM Tunnelling & Mining
WJ Canada has expertise in supporting projects utilising the New Austrian Tunnelling Method (NATM) for tunnelling and mining. NATM, also known as SEM (Sequential Excavation Method) as well as SCL (Sprayed Concrete Lining), uses the inherent strength of the surrounding rock to support and stabilize tunnels, rather than using more costly reinforcement methods.
By undertaking a number of projects across the globe as the NATM method developed, WJ has been at the forefront of developing equipment for use underground as part of NATM projects. Our proprietary methods and equipment allow us to dewater NATM Tunnels from inside the tunnel, even in conditions where there is hydro static pressure.
Find out more in this article by Dr Martin Preene in the October 2020 edition of Tunnels & Tunneling magazine.
Featured NATM Tunnelling & Mining Projects
Eglinton Crosstown Light Rail Transit System
The Eglinton Crosstown Light Rail Transit (ECLRT) project
Cross Cut Completion at Oakwood Station
A challenging commission, which combined difficult dewatering conditions with innovative construction techniques.
Sump Pit Completion at Caledonia Station
In the world of dewatering, clay is clay. No matter how thin, a continuous layer can quickly change dewatering requirements.
Quick Turnaround Dewatering at Science Centre Station
When CTS construction teams unexpectely found groundwater at the bottom of the Eglinton Crossrail excavation, they called WJ for help dewatering the site.
