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The installations at the Inga were in need of renewal. Since they went into service in 1972 and 1982, the auscultation systems for the Inga 1 and Inga 2 hydroelectric installations had not been fundamentally modified and were no longer state-of- the-art in terms of the auscultation of structures of this size and importance.
The teams from Fondasol's International Studies department were therefore involved in the geotechnical investigations for their upgrading.
Period: January to December 2016
CUSTOMER SECTOR Energy player
OWNER SOCIETE NATIONALE D’ELECTRICITE
PROJECT MANAGER CEMENTYS
TYPE OF STRUCTURE Civil engineering, Maritime structures, Renewable energies
ENTITIES Fondasol
AGENCIES - SERVICES Fondasol International Studies
The waters of the River Congo are deviated by the Inga hydroelectric dams via an old arm of the river Congo, a system that consists of the following structures:
The objective of the project was, firstly, to core drill a series of reconnaissance boreholes in the foundations, to re-establish and extend the installations' auscultation system taking account of technological progress in the field, the changes in the behaviour of the structures and the presence of reconnaissance boreholes to install instruments.
The boreholes were drilled on the Inga 1 and 2 dams on the crests and inside the drainage galleries of the dams.
Each installation required craning operations. The boreholes in the drainage galleries required the use of a drilling rig with a separate power pack, in due to the limited space in the work area.
