- Client: Länsimetro Piispanportti 10 02200 Espoo, Finland
- Designer: Kalliosuunnittelu Oy Rockplan Ltd. Asemamiehenkatu 2, Helsinki, Finland
- Contractor: Työyhteenliittymä Metro 2, c/o Destia Oy PL 206, 01301 Vantaa, Metrostav a.s., Division 5
Koželužská 2450/4, Prague 8, Czech Republic, Destia Oy, Heidehofintie 2, PL 206 Vantaa, Finland - Construction terms: 05/2016 – 11/2018
- Price: 36.249.176 EUR
Project description
Rail tunnels and Espoonlahti station – LU24 – is a part of a second stage of Länsimetro project which connects Hel- sinki capital area with a city of Espoo in total length of 7km and 5 underground stations. The section LU24 – Espoonlahti consists of total driveage 2.984m of track tunnels and a station excavated in hard granite formations by usage of method Drill & Blast. The construction includes two technological chambers with ventilation shafts in each of them and seven interconnection tunnels. Challenging task was an excavation of underground station with the Lippulaiva business centre above, blasting works in vibration sensitive zones in highly populated urban area together with excessive amount of grouting works.
Project data
| Total length: | 2.984 m |
| Rail tunnels profile: | 36.2 m2 |
| Undergroung station profile: | 383 m2 |
| Average overburden: | 7–30 m |
| Excavation volume: | 245.545 m3 |
| Rock bolts: | 102.850 m |
| Shotcrete: | 12.373 m3 |
| Grouting material cement: | 2.183.290 kg |
| Polyurethane: | 42.344 kg |
| Grouting time (pumps operational time): | 3.700 h |
Photogallery