Gran Manglar Viaduct

An alternative construction method has been implemented starting from the original proposal envisaged by Colombia's National Infrastructure Agency, and resolves all the projects requirements and issues.

A similar project has already been developed by Deal on the Washington Bypass, North Carolina.

The implant consists of three production lines:

•           Pile caps: consisting of a "long line" mould for production of match cast elements.

•           Pile: moulds are modular for the production of piles of different lengths (30-58 m). Each mould is equipped with a fixed bulkhead used for the installation of mechanical connection devices between the pile elements.

•           Girders: made from a mould for the production of beams;

The movement of the prefabricated elements is carried out by means of the gantry crane and the straddle carriers equipped for the different elements.

On typical spans, the gantry drives six piles and then sets the precast concrete caps in three pieces on the piles. The caps are post-tensioned and infill concrete is placed. The concrete infill is loaded into buckets and transported to the leading end of the truss using the gantry trolley. The trolley maneuvers the bucket into the position required for concrete placement. Next, three beams are placed by the gantry and the concrete deck is cast. Once the 28 MPa concrete compressive strength is achieved, the gantry moves forward, and the cycle is repeated for the next span