Starts the construction of the tunnel of the AVE Madrid-Barcelona - France
September 8, 2009
The well has a circular structure consisting of screens with an inner diameter of 19.7 meters. A milling machine, a system that offers maximum guarantees of security and minimizes the impact on the ground will be used for their implementation. This machine will place screens, 1 meter in thickness, to its depth of 46.5 metres, so that the top will be located at an altitude of 38.8 meters on the contrabóveda (floor) of the tunnel.