In February 2018 the construction of a bridge over the Nanay river between Bellavista and Santa Tomás, close to the city of Iquitos, in Peru, begun. The bridge replaces a ferry system across one of the major tributaries of the amazon river. The cable stayed portion of the bridge from expansion joints is 437.6 m with the main cable-stayed span stretching 241.5 m. The two towers reach 76 m and are anchored by 18 drilled shafts.
Pedelta has successfully completed the technical review of the design and coordination of the wind climate characterization, wind tunnel tests and analysis of the bridge including buffeting amplification of the wind load.
The bridge aerodynamics was effectively improved with geometrically subtle modifications to withstand the action of winds without developing undesirable dynamic responses.
As a result of the review, some structural reinforcement details have been improved in parts of the towers where plastic hinges could develop. Furthermore, stay cables anchorages, bearings, and joints, have been improved to completely fulfil the Code requirements.
The construction is ongoing and the bridge is expected to be completed and opened to traffic by June 2021. Once completed, the Nanay bridge will become one of the greatest accomplishments in bridge construction in Peru.