Diagnosis of Songloulou Dam:
Innovative stress measurement on concrete abutment
Vincent LAMOUR, Maxime TATIN, Tien Dung LE
CEMENTYS - FRANCE
The Songloulou dam is built on the Sanaga River in Cameroon. It has a drainage area of 130,000 km, an interannual modulus of 2000 m3/s and the following flood flow characteristics: Q10 = 7400 m3/s, Q100= 8000 m3/s, Q1000 = 8890 m3/s and Q10000 = 9830 m3/s. With an installed capacity of 384 MW, it is the main hydroelectric scheme of Cameroon. The owner is AES- SONEL.
Concrete swelling phenomenon have been identified six years after the commissioning of the first groups (1981) through the reduction of gaps between stationary and movable parts of turbines and alternators. Since,swelling lead to various problematic consequences for the operation and safety of the structures: cracks, difficult handling or even blockages of valves, cofferdams spillway and water intake, deformation of stationary parts...
Please find the full article enclosed!