Designing and developing the most reliable, efficient, economical and environmentally friendly solutions: this is how we build a better world.
Our projects
Locations
Respect for the environment, eco-construction, mobility and transport, urban growth, energy: these major contemporary challenges are at the heart of our day-to-day concerns.
Since 1957, our expertise and our ability to manage complex projects have led us to embrace society’s major transitions, always with the same passion.
Learn, Act, Grow: this is the setec group’s commitment to all of our employees. It is the foundation of all actions we take with our companies’ HR teams.
Expert perspective

Back to projects

Ashegoda Wind Farm

Missions

TERRASOL carried out, on behalf of VERGNET, the geotechnical studies for the wind turbines’ foundations, including the design of the anchoring micropiles for the stays of the turbines, as well as their execution follow-up. The geology of the Ashegoda site corresponds to the Mekele sedimentary basin and is formed by the marl-limestone layers of the Agula shale and the jurassic age Antalo limestone: essentially an alternation of calcareous beds and marly layers of pluridecimetric to plurimetric thickness. The 6 wires of each device are anchored with micropiles which undergo cyclically varying traction forces. TERRASOL developed a design method based on the concept of a cyclic stability diagram: this approach consists in defining a stability domain of the cyclic sollicitations in a plane with their average component in abscissa and their cyclical component in ordinate, and then comparing this domain resulting from the properties of the micropile and of the surrounding soil with the cyclic forces endured by the foundation.

Client

VERGNET

Date

From january 2009 to january 2012

Localisation

Ethiopia

In the context of an EPC contract, VERGNET was in charge of the project “Ashegoda Wind Farm” in Ethiopia. With a capacity of 120 MW, it was the largest wind farm in sub-Saharan Africa at the start of the project (October 2009). With the supply and installation of wind turbines, this project also includes the construction of roads to access the turbines (about 35 km in total), power grids (underground and aerial 33 kV) and the 33kV / 230kV substation which injects the energy produced into the national transport network.

Challenges

Foundations of the wind turbines

Ashegoda Wind Farm

Missions

Client

Date

Localisation

Challenges

Also discover in "Renewable energy"

Project management for the upgrading of the fumes treatment system at the saint-ouent waste-to energy plant

Environmental assessment of the planned offshore wind farm in Southern Brittany (AO5)

Ex-ante evaluation of the BeMed project: working towards a plastic-free Mediterranean Sea