Experience in operating the overflow dam of the Krasnoyarsk hydroelectric station

Conclusion

• 1. The spillway face of the Krasnoyarsk dam is in satisfactory condition.

• 2. The provision of a good quality of even ordinary hydrotechnical concrete placed in an absorbing formwork creates a sufficiently reliable counteraction to cavitation erosion for dam spillways with a height up to 100 m.

• 3. There is practically no aeration of the flow on the spillway.

• 4. The problem of creating cavitation-resistant concretes remains urgent, especially for placement on the surface of the dam bucket where it is difficult to use methods of active protection against cavitation.

• 5. It is necessary to avoid the emergence on the spillway face of steel elements both of a structural and technological purpose.

• 6. It is desirable to protect a spillway face of relatively cavitation-resistant hydrotechnical concrete in the zone of maximum flow velocities with weather-resistant protective coatings.

• 7. To improve methods of predicting cavitation damages of concrete it is necessary to create a unified method of evaluating its cavitation resistance and effect of the structure and compositions of the material of it.