Rail line

The construction contract for the Matinkylä–Kivenlahti section of the rail line started in June 2018, implemented by GRK Infra Oy. The contract involves the construction of seven kilometres of rail line, seven shafts and 32 connecting tunnels.

The shafts are being built at intervals of approximately 600 metres in holes excavated from ground level to the rail line, for the purposes of ventilation, smoke extraction and pressure equalisation. The shafts also serve as emergency exits. The purpose of the connecting tunnels is to interconnect the two parallel tunnels and ensure the safety of the metro in emergency situations. The connecting tunnels are around 150–170 metres apart.

Rail tunnel structures are being simultaneously built for three sections: Matinkylä–Kaitaa, Kaitaa–Espoonlahti and Espoonlahti–Kivenlahti. During the construction phase, quiet work may be carried out around the clock, but noisy work must be performed according to the noise permit issued by the Espoo Environment Agency:

  • from Monday to Friday between 7.00 am and 6.00 pm
  • on weekdays from 6 pm until 10 pm and on regular Saturdays from 9 am – 6 pm (for no more than 10 Saturdays), provided that the noise level of the work does not exceed 35 dB in nearby residences

Contact information for the rail line contract:

The address of the worksite base is: Hyljetie 6, 02260 Espoo
On-duty worksite phone: +358 (0)50 516 7606
GRK Infra Oy’s contact person: sami.eskelinen(at)grk.fi
Länsimetro’s feedback line (Mon–Fri, 9 am to 1 pm): +358 (0)50 377 3700

Addresses of the shafts being built in the rail line contract:

Suomenlahdentie shaft: Suomenlahdentie 22, 02230 Espoo
Riilahdentie shaft: Riilahdentie 2, 02260 Espoo
Hyljetie shaft: Hyljetie 6, 02260 Espoo
Soukanväylä shaft: Soukanväylä 7, 02360 Espoo
Maininkitie shaft: Maininkitie 11, 02320 Espoo
Opettajantie shaft: Opettajantie 5, 02360 Espoo
Kauklahdenväylä shaft: Kivenlahdentie 19, 02320 Espoo

How is a tunnel built?