Construction — South America — Brazil — Bridges
The São Paulo Metropolitan Ring Road , Lot 2 : Production of Precast Segments for the Construction of a Motorway
The Rodoanel Norte is the fourth part of the 177km long Rodoanel Mario Covas around São Paulo and the last part to be completed . The road , which is also known as São Paulo Metropolitan Ring Road , will relieve the city from very high through traffic of approximately 300,000 vehicles per day .
The Rodoanel Norte connects São Paulo , Guarulhos and Arujá . This northern section of the ring road has between 3 and 4 lanes in each direction . The project was divided into 6 lots and includes the construction of 7 tunnels as well as 114 bridges and viaducts . The OAS Company was awarded the contract for construction of Lots 2 and 3 . In Lot 2 , OAS built a bridge that is connected to a tunnel . The bridge that crosses a valley consists of two separate bridge structures , the precast segments of which were produced in a field factory on site .
DSI Prepron produced and supplied the post-tensioning system that was required for stressing the precast segments . Also , DSI Prepron supplied material and provided services for the construction of successive cantilevers on the jobsite . 30 Bonded Type 15-0.6 " Strand Tendons were installed into the precast concrete segments of both structures ( 15 per segment ). DSI Prepron carried out the stressing and grouting of all tendons on site using equipment developed by the company .
Minimum tolerances were applied during tendon stressing in order to ensure the high quality of the precast beams .
Thanks to the excellent cooperation of all parties involved , the first bridge was successfully completed in only 6 months and the second bridge in only 4.5 months .
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