Construction of Generators at the Sinop Hydroelectric Power Plant

The Sinop Hydroelectric Power Plant in Brazil is currently under construction on the Teles Pires River approx. With two generators, the power house will have an installed capacity of 408MW and thus be able to generate electricity for approx. 1.6 million people, which is equivalent to approx. 50% of the population of Mato Grosso.

The reservoir, located 70km from the city of Sinop in the federal state of Mato Grosso, will have an area of 337km² at a maximum water level of 302m. The volume will equal approx. 3 billion m³ at a maximum depth of 48m.

To keep project costs low, a large scale slope stabilization was realized using soil nails consisting of low strength steel. However, afterwards, a landslide occurred which fortunately did not injure anyone, but which destroyed the complete slope stabilization. As a safe and permanent solution, a slope stabilization using permanent 32mm Ø, St 95/105 DYWIDAG Bar Anchors was chosen.

Within a short period of time, Protendidos DYWIDAG supplied more than 10,000m of DYWIDAG Threadbar for approx. 800 bar anchors to make up for lost time. DSI Prepron’s post-tensioning systems were used in 4 of the trunnion girders supporting the dam’s 3 radial gates. In each girder, 18 Type 22-0.6" DYWIDAG Strand Tendons were used for longitudinal post-tensioning and 12 Type 14-0.5" DYWIDAG Strand Tendons were used for transverse post-tensioning. A force of 4.415kN was applied to the longitudinal tendons and a force of 1.962kN to the transverse tendons. DSI Prepron installed all tendons and provided the required equipment.

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CES Cia Energética Sinop, Brazil