Paloheinä Public Transportation Tunnel

The Paloheinä tunnel is a traffic tunnel running underneath Helsinki Central Park for more than a kilometer. Rather than a new bus line passing through the park, it was decided to run it through a tunnel under the park and preserve the recreational uses on the surface. Currently, the tunnel is only used by public bus transportion, but the design has also accounted for possible future tram traffic. The main 560 bus line using the tunnel carries passengers between Vuosaari and Myyrmäki.

Completed in 2015, the Paloheinä tunnel fell short of the budget by more than 6 million euros. The savings arose when the plans were simplified, and a single-pipe tunnel was built instead of a two-pipe tunnel. The rock excavated during the construction of the tunnel was used in the area for the rehabilitation of the Paloheinä recreation and for the construction of the Kuninkaantammi area.


Principal design, architectural, rock mechanics and tunneling, and structural design

Related References

West Metro

Länsimetro Oy

With the West Metro extension, the Helsinki metro network will reach Espoo, increase in length by 21 kilometers and see 13 new stations constructed along its run.

Vuosaari Transportation Tunnels

Tiehallinto/ Vuoli-projekti

Rockplan designed Vuosaari Harbor’s Porvarinlahti road tunnels and Labbacka railway tunnel in cooperation with Finnmap Infra Oy. The 1,600-meter-long submarine road tunnel in Vuosaari is approximately 25 meters below sea level at its deepest point.

Viikinmäki Wastewater Treatment Plant

Helsingin vesi (now Helsinki Region Environmental Services Authority HSY)

The Viikinmäki rock treatment plant, which was built mainly inside the rock, was put into operation in 1994. The treatment plant’s process is based on the activated sludge method.


For more information please contact Ville Annila
+358 40 457 1365