Over 60 per cent of framework construction completed at Sammalvuori depot

The metro depot under construction in Sammalvuori, Espoo, has proceeded in parts to roof wetting.

More than 60 per cent of the concrete and framework construction has been completed. The framework includes the walls, roofs, floors, foundations etc. Work on the building services has also begun,” says Minna Alantie, who is in charge of the Sammalvuori site supervising.

“The roof of the shaft construction at Sammalvuorenportti and the first waterproofing layer have been completed. Work on the water insulation in the service tunnel walls and roof is also proceeding well. The prefab installations in the staff entrance shaft are continuing, and the walls are being installed in the first floor. In the storage hall, we are working on the tunnels under the rails,” says Alantie.

All in all, the depot is about 20 per cent ready. Once the concrete structures are ready, we can start working on the wall, roof and floor surfaces. Building services work, that is, ventilation and electricity work, may begin once the framework is ready. Work on the sewage system has been ongoing all along.

“Rooms in the depot will gradually be taking form and be given names. It’s quite different from working right after excavation in large, open halls with no intermediate walls,” says Alantie.

The depot is different from other work sites in phase two of the West Metro in that the Sammalvuori consortium (Kalliorakennus-Yhtiöt Oy, EM Pekkinen Oy, Konevuori Oy and Aro-Systems Oy) is in charge of design, excavation, construction and building technical building services. The excavation and construction began in 2016 and is expected to be completed in 2020.

“Working with the consortium has been very flexible and cooperation between, for example, design and construction has been seamless,” says Alantie.

Two underground halls are being constructed at the Sammalvuori depot: one for the night-time storage of 20 trains, the other for maintenance facilities.

“We also have to bear in mind that the depot will be a workplace for people. It will be manned round the clock, and the premises must meet the staff’s needs: the depot has, for example, showers and dressing rooms, toilets, break rooms, offices and meeting rooms,” says Alantie.