The Reventazón Hydroelectric Power Plant: Foundation of Transmission Lines using DYWI® Drill Micropiles
The new Reventazón Hydroelectric power plant in Costa Rica is the largest hydro station in Central America and the second largest construction project in the region after the Panama Canal. The power station is located in the Siquirres Canton and will supply energy to approximately 525,000 households with a generating capacity of 305.5MW. To ensure the electricity supply to the region, ICE built and modernized a total of 164km of transmission lines.
In the remote areas of the Sarapiqui Mountains, it would have been difficult to build the foundations for the transmission towers using reinforcing steel mesh and large concrete blocks.
For this reason, the foundation was built using micropiles. For economic reasons and due to the faster installation time, DSI proposed the use of self-drilling T40N, 40mm Ø DYWI® Drill Micropiles as an alternative to the originally planned, conventional micropiles.
In total, 753 DYWI® Drill Micropiles with 592 couplers, 592 spacers, 532 nuts and 266 90mm Ø cross bits were installed in the foundations of the new transmission lines.