Allerru Elevated Roundabout on N-I

Allerru Elevated Roundabout on N-I

In order to transform the Allerru intersection into an elevated ring road on the N-I, 2 twin overpasses are designed as a unique solution to project requirements: required clearance road bridges, minimum impact on N-I during construction, economical solutions and integration in the environment.

The 2 twin beams bridges with a span of 34.5 m, are elastically fixed-ended in the supports, and have warped webs. The deck is a reinforced concrete slab 20 cm thick concreted directly over U-folded metal beams placed every 1.5 m. At the bottom of the "U-folded " beams styrofoam cylinders are placed, as permanent formwork.