Metro Construction, LU6E section, the Karhusaari Tunnels
The Länsimetro (West Metro) project is a new transport link between Helsinki and Espoo in Finland. With a scheduled transport capacity of 100,000 passengers per day, it is directly linked to the only operated line, which is 21 km long.
KalliosuunnitteluOY Rockplan Ltd.
04/2011 – 10/2013
Länsimetro (West Metro) is a new transport link between Helsinki and Espoo completely underground at a length of 14 km. The LU6E – Karhusaari track section consists of a total of 2,613 m of mining carried out in hard granite using the Drill & Blast method. Mining of three technological chambers with ventilation shafts in each of them and seven tunnel junctions are also part of the delivery. The section route is partly under sea level and it proceeds under, among other things, the foundations of the Nokia headquarter buildings. The most challenging task was to excavate sections under the sea level, in areas sensitive to seismic load due to blasting works, along with a considerable amount of grouting works.
Project in Numbers
- 36,2 - 42,1 m2 Tunnel profile
- 140 000 m3 Volume of excavated material
- 26 - 35 m Depth of 3 shafts
- 55 000 m Bolting equipment
- 1 360 000 Kg Cement
Exceptionality of the Structure
Mining under sea level. Mining in a seismically sensitive area under the foundation of the Nokia headquarters. Award by the contracting authority for the safest construction site of Länsimetro.
Check out other reference structures from the field of Urban Metro
Extension of metro line C Ládví – Letňany
The aim behind extending line C of the Prague metro between Ládví and Letňany was to improve transport services in the northeastern part of Prague.
Extension of metro line A Dejvická - Nemocnice Motol
The aim behind extending line A of the Prague metro was to improve the quality of transport services in the northwest sector of Prague.
Extension of metro line C Holešovice – Ládví
The aim behind extending line C of the Prague metro between stations Nádraží Holešovice and Ládví was to improve transport services in the northern part of Prague, as well as to improve the quality of the environment for the inhabitants of the districts concerned due to the re...