Follo Line Project, another milestone achieved: 20.000 rings produced

A huge milestone is reached. Acciona Ghella Joint Venture has now casted the last segments needed to finish the precast production of TBM-rings.

The segment production started in May 2016. It has been a massive work to prepare for production and put up the factory, which has an area of 22.700m2. The production has been linked to the TBM-progress and has followed the schedule of the tunnel development.

The production is now finished with around 20.000 completed rings, eight segments per ring, seven structural segments and one invert segment. More than 470.000 m3 of concrete and 19.000 tons of steel have been used to produce the rings.

Three factory lines have been used at the same time and more than 300 people at peak have been involved in the production. Such a personnel-intensive business has required good planning and sufficient access to expertise and resources. There has been continuous work day and night, done by different shifts.

The carousel and equipment inside the factory will now be disassembled and the factory building will in near future be used for other purposes, for example as a storage.



Follo Line