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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