The Porto Sudeste: Technical Support for the Startup of a Conveyor System
The Porto Sudeste do Brasil is a private harbor terminal in Itaguaí located approximately 80km from Rio de Janeiro. The recently opened harbor has a surface area of approximately 52ha and is currently designed for a capacity of more than 50 million tons of iron ore and other bulk goods per year. The new harbor premises were mainly built to export iron ore that is extracted from mines in the federal state of Minas Gerais into other countries.
On the premises, conveyor belts with a length of more than 4,000m and a carrying capacity of 12,000t/h were installed that can transport the iron ore at a velocity of 5m/s. A steel bridge that leads over a railway track is also part of the conveyor system.
The bridge is braced by 4 coupled bar tendons that are protected by ducts. Construction of the bridge was started by a foreign company, but never finished. For this reason, the General Contractor was looking for a domestic company that could carry out the stressing of the bar tendons and complete the bridge structure.
Among other local companies, DSI Prepron was selected to provide a solution and asked to carry out the tensioning work. DSI Prepron’s experienced employees retensioned the bar post-tensioning tendons in accordance with a precisely defined tensioning protocol, bringing the steel structure to the right position, thus ensuring the proper functioning of the bridge.