The subway to Nacka is being built using traditional tunneling methods, which involve drilling, loading, and blasting.
Building a tunnel is complex and time-consuming. Skanska's team advances about five meters per day in the tunnel, which is expected to be 1.2 kilometers long.
Skanska has found a way to reuse the process water in the tunnels. It is centrifuged to remove sand and fine rock particles, and can be reused in the tunnel boring machines.
Vision of the Nacka subway platform. Rendering of Region Stockholm and Sweco.