2009-2011 Rehabilitation of Arzni Shamiram, Low Hrazdan, Artashat and Shirak Main Canals
The Client: “Millennium Challenge Foundation” SNPO
The canals were rehabilitated within their own frames.
The following was implemented for rehabilitation:
– Clean the canals from sediments and vegetation;
– Demolition of concrete offsets;
– Clean the canal bottom and walls of deteriorated concrete;
– Fill in the cavities with B7.5 class concrete
– Cover the bottom of the canal with B 12.5 concrete
– Cover the existing concrete with 10cm of B 12.5 concrete on the trapezoidal parts of the canal, etc.
– Plan transverse joints of 4m from each other all along the canal
– Repair water dischargers by installing new valves
– Dismantle the existing slabs and install new ones, replace reinforced concrete slabs in the places where the walls are covered where (3×1.5)m reinforced slabs
– Create a preparatory layer of B 7.5concrete behind the slabs.
The following scope of work was implemented:
| 1. Clean the canal of sediments | 21300 m3 |
| 2. Earthworks | 11400 m3 |
| 3. Pebble graveling underneath the concrete cover | 2400 m3 |
| 4. Gabion masonry | 600 m3 |
| 5. Dismantle of old concrete and reinforced concrete | 14200 m3 |
| 6. Clean concrete surface | 123500 m2 |
| 7. Monolithic reinforced concrete installation | 16600 m3 |
| 8. Reinforcement | 192 t |
| 9. Shotcrete | 41500 m2 |
| 10. Construction of joints | 37100 m |
