High-head vertical lift gates

Conclusions

• 1. The presence of high-head gates whose performance has been verified is presently the main unused potential for improving the layout, reducing the cost, and increasing reliability when designing high-head hydroelectric stations, especially of the Nurek or Rogun type, the construction of which requires driving numerous tunnels for the construction period.

• 2. During a relatively short period considerable work has been accomplished in the area of creating high-head vertical lift gates, as a result of which it was possible to use them in the construction of such large objects as the Nurek hydrostation.

• 3. The creation of reliable vertical lift gates requires a qualitatively new approach in their manufacture and assembly.

• 4. It is necessary to avoid dispersing means and resources for the creation of numerous new types of gates, considering in this case the use of balanced systems the least acceptable of all for vertical lift gates.

• 5. The emergency-guard ring-follower gate of the spillway of the Inguri hydrostation should be considered the most reliable and most perfect of the gates designed by special designs departments of the State All-Union Construction and Installation Trust (Gidromontazh), which is suitable for use in conduits in both the construction and operating periods.