Stefanenko N.I.,Sayano Shushenskaya HPS |
Zateev V.B.,Sayano Shushenskaya HPS |
Permiakova L.S.,Sayano Shushenskaya HPS |
Reshetnikova E.N.,Sayano Shushenskaya HPS
International Water Power and Dam Construction | Year: 2010
Sayano-Shushenskaya witnessed a fatal accident in the powerhouse, after which the behavior of the dam has subsequently changed. The dam foundation composed of igneous rock (orto-paraschist) featuring practically uniform mechanical properties. The dam has sustained considerable dynamic impact caused by the accident in the powerhouse. The heaviest damage was inflicted to the powerhouse at elevations 327m and 320m. The seasonal variations in the reservoir stages cause consolidation of the bank abutments and displacement of the dam sections towards the banks, which entails an additional inclination of the dam in the downstream direction. Uplift pressure under the dam base has not exceeded the specified values that are efficiency of the grout curtain is secured. No new fissures, new sources of seepage or local increase in the seepage flows through the impounding structures have been detected.