There have been six hot and busy weeks in the Follo Line Project this summer.
At Oslo S, the unique concrete culvert tunnel has been pushed under the Østfold Line track, with absolutely limited interference on the existing railway. This is the first time this method has been used for railway works in Norway.
The gigantic structure (82 m long, 9 m high and 13 m wide, total weight 7000 tons), was built in two parts and moved in place by large hydraulic jacks. The jacking job was done in less than two weeks, thanks to the good planning and professionality of the contractor and the SWS design team involved.
Take a look here at the construction time-lapse video.