Building a bridge over a busy motorway is risky and awkward for contractors and motorists alike, so Ferrovial avoided road closures and lots of night work by building the Concordia Bridge over the M-12 in Madrid beside the motorway, rolling it into place with just one road closure.
The operation was needed to connect the urban area of Valdebebas with the environs of Terminal 4 at Adolfo Suárez Madrid-Barajas Airport.
The 130-metre-long, landmark bridge has a segmental arch and a low-slung deck crossing the M-12 motorway with a 162-metre span between pillars.
Once the bridge was built, Ferrovial manoeuvred the 2,400-ton structure into place using self-propelled modular trailers (SPMTs) while the M-12 was closed to traffic, the company told GCR.
- Watch it happen …
The deck is a metal box with a concrete slab 24.5m wide. It has two carriageways, each 3.5m wide, external walkways measuring 2.75m beside the deck wall, and a 5m median. The deck is connected to the arch by means of a tubular mesh called a diagrid.
Image: Ferrovial manoeuvred the 2,400-ton structure into place using self-propelled modular trailers (Still from Ferrovial’s video)