Reparations of inlet and outlet in Zankoeta II Tunnel

The actions carried out in the Zankoeta II Tunnel consisted of:

1. Filling of the track area to a level higher than the current tunnel key to stabilize the slope and avoid the risks inherent in any activity carried out under it.
2. Execution of a micropile screen to contain slippage.
3. Excavation and placement of the moorings.
4. Execution of a false structural tunnel (under the cover of the micropile screen) that allows the collapse to be reconstructed and expanded to cover the entire unstable area.
5. Structural reinforcement of the interior of the tunnel.
6. Replacement of track and installations.