Project Information: Excavation of the mainly carvern, transformer cavern and control gates caverns and shafts.
The design includes 12 access , reconnaissance, cross and emergency tunnels that add up to 1,267 m long with 8.4 to 43.5 m² cross sections.
Also the penstock, control gates and outflow.
Place: Nogueira de Ramuín
- Sección: 19 m2 / 500 m2
- Longitud: 2,000 m
Method of Tunneling:
- Roadways by drill and blast full section
- Caverns by NATM
- Raise borer
Geology and Geotechnical Data:
- Granites showing different weathering and fracturation process
- Jumbos Atlas Copco Boomer and Atlas Copco Rocket (Two booms and service plataform)
- Wet – mix Robojet Putzmeister Sika η = 30 m³/h