1997-1999 Argel HPP. Repair-rehabilitation Works. The Chute of No-operation Spillway
The Client: SE “Sevan-Hrazdan Cascade of HPP” CJSCo. RA
The rehabilitation of the chute was stipulated by the need to secure normal and stable operation of one of the largest HPP on the Hrazdan River after the destruction of the active chute as a result of a landslide down the hill, on the slope of which it was situated. The works on the new route were conducted on the mountainside with a slope from 28° to 32°. The works on the route in mountainous terrain required the application of special engineering solutions and technological schemes.
As a result the following rehabilitation works have been implemented on 343.1 m long reconstructed section and newly projected 635 m long stretch:
| 1. Earthworks | 212 876.9 m3 |
| 2. Drilling-and-blasting works | 34600 m3 |
| 3. Concrete and reinforced concrete | 11596.0 m3 |
| 4. Installation of reinforcement | 433.6 t |
| 5. Steel structures | 50.6 t |
| 6. Joints (metallic keys) | 1321.7 m |
| 7. Ф 530 mm built-in-place reinforced concrete piles | 405 m |
| 8. Consolidation grouting | 491.4 m |
| 9. Masonry work | 34.8 m |
| 10. Laying of low-voltage and high-voltage cables | 2694 m |
| 11. Laying of pipelines | 1969m |
| 12. Preparation of peddle gravel mattress | 2879.7 m3 |
| 13. Insulation works | 5057.0 m2 |
| 14. Asphalt carpet | 3905 m2 |
| 15. Precast reinforced concrete (reinforcement of covering) | 99.6 m3 |
| 16. Painting of steel structures | 640 m2 |
| 17. Drilling of wells | 690 m |
