Completion of the construction of Sevan-Dilijan Highway tunnel, LR-11.
The tunnel construction works were recommenced after a very lengthy standstill, that had a negative effect on the structures constructed earlier. The works were conducted simultaneously from Northern and Southern Portals. The driving of tunnel at the stretch of about 200 m length was executed under utterly complicated mining-and-geological conditions that required special drifting methods with segregated-phase mining of rocks, strengthening of temporary roofing. The lining of tunnel in earlier constructed sections and the ceiling of air ducts have been reconstructed. The works on waterproofing and on drainage system, on the roadbed in the tunnel and the adjoining areas, ventilation system, electric lighting, traffic safety and control of the flow of traffic have been executed.
The works implemented on outer engineering networks, communications and structures include:
1. Construction of buildings for the maintenance and security staff;
2. Laying of 35 kV transmission line and installation of substations;
3. Construction of the pumping house, ventilation building etc.
As a whole the following main scopes of works have been implemented :
1. The earthwork – 73774.4 m3.
2. Concrete and reinforced concrete – 27796.3 m3.
3. Grouting works –9777.6 m2 and 7969.5 m3.
4. Installation of reinforcement – 2122.9 Ton.
5. Steel structures – 643 Ton.
6. Shotcreting – 13787.1 m2.
7. Plaster work – 17011.8 m2.
8. Drilling of holes – 18682.2 m.
9. Laying of pipelines – 13817.6 m.
10. Waterproofing (screen of aluminum sheets) – 9.8 Ton.
11. Crushed stone mattress – 10850.2 m3.
12. Roofing – 1223.7 m2.
13. Tile lining - 283.8 m2.
14. Block-stone lining - 216.3 m2.
15. Erection of partitions – 505 m2.
16. Basalt border – 4843.2 m.
17. The stone-work – 151.5 m3.
18. Windows, doors – 120.3 m2.
19. Glazing – 246 m2
20. Asphalt carpet – 20384.7 m2.
The cost of works was 3242020.77 thousand Dram or 5619102 $US.
The Customer: PIU “Construction of Roads” of Ministry of Finances and Economy of RA.
Address: Republic Square, Government Building 2, Room 105
