Underground Civil Works
Construction Project to Adapt Mamariga Tunnels in Road N-644 (Bizkaia)
Owner: Provincial Council of Bizkaia
Client: UTE Mamariga
The main purpose of the Construction Project to Adapt Mamariga Tunnels was the adaptation of the tunnels, both the tube in the direction of the Port as well as the tube in the direction of the A-8 highway, in compliance with the requirements of Bizkaia’s current regulations on tunnel safety established in Regional Decrees 135/2006 and 91/2012.
As the layout of the tunnels dating from the 90s is quite irregular, a modification of their geometry was defined. To make this modification possible, it was necessary to carry out excavation and inner grading in several areas of the section of the tunnels, both in the tube in the direction of Santurtzi as well as the tube in the direction of Bilbao. With these modifications, we gained the necessary space to place an aesthetic lining made up of vitrified panels with a height of 2.50 metres on the side walls of both tubes, new fans, new lighting with LED technology and all the signs.