The Gazapa Bridge is part of the new network extension project of Cucuta, Colombia. The bridge crosses Pamplonita River connecting the River Avenue with the west beltway. The bridge has an overall length of 787 ft (240 m). The deck is a continuous girder of three spans 196+393+196 ft (60+120+60 m).
The deck is connected monolithically with two hollow, concrete piers with dimensions of 18x13x36 ft (5.6×4.0x11 m), which form a portal frame supported by neoprene bearings at the abutments. The cross section of the deck is 35 ft (10.9 m) wide and consists of a single-cell, post-tensioned concrete box girder, with a variable depth of 8 to 22 ft (2.5 to 6.75 m). The depth of the foundations was reached using 4 ft (1.5 m) piles.
Due to the significant height of the bridge and to minimize the environmental impact on the River, the balanced cantilever method was selected. This construction method requires careful displacement prediction and control, and for that reason advanced bridge design software was used (RM Bridge).
Since the width of the deck is approximately 20% of the main span, important shear lag effects were considered in order to correctly predict the stresses and displacements of the bridge in every construction phase.