With approximately 20 million inhabitants in its metropolitan area, São Paulo is the largest city in Brazil and the country's most important economic and financial centre. Currently, 93 % of all goods are transported on the roads of the city, which regularly causes up to 200 km long traffic jams.
To relieve the city area from traffic flowing through the city, the 177 km long Rodoanel Mario Covas is currently under construction. The road that is also known as São Paulo Metropolitan Ring Road is one of the largest construction projects in Latin America and will be connected to the 10 motorways that lead into São Paulo.
The fourth section of the ring road, the Rodoanel Norte, is divided into six lots. Lot 1 is carried out by the Joint Venture Mendes Júnior-Isolux Corsán, the General Contractor OAS is building Lots 2 and 3, Acciona Lots 4 and 6, and the Construcap-Copasa Joint Venture is carrying out Lot 5. The two lots Acciona has been awarded the contract for have a total length of 25 km.
Nearly 2,000 prefabricated segments for bridges and viaducts
DSI Prepron supported all six lots with high quality products and services. Nearly 2,000 prefabricated segments for the new bridges and viaducts were stressed using post-tensioning systems. DSI Prepron also carried out the stressing and grouting work.
For Lot 6 that is being built by Acciona, DSI Prepron also produced and supplied its strand post-tensioning system for the prefabricated segments. The beams were produced in a factory on the job site, and five strand post-tensioning tendons were installed in each segment. The strand tendons that were inserted in ducts were stressed using a jack.
Due to the very limited time frame, DSI Prepron and Acciona planned all the steps necessary for a faster construction progress. Thanks to the optimized workflow, the complete stressing and grouting work on the tendons of the 70 prefabricated beams, each 40 m long, was successfully carried out in only three weeks.
Work at this major project has not yet been finished.
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