Arifiye - Sincan Railway Project, Ayaş Tunnel

PROJECT NAME:Arifiye - Sincan Railway Project, Ayaş Tunnel
LOCATION:Ayaş - Ankara / TURKEY
TYPE OF WORK:Dual line railway tunnel with horse shoe cross sectional area
TUNNEL DIAMETER (concrete inner
diameter): 9.60 m
TUNNEL LENGTH:10,064 m

DESCRIPTION
Ayaş Tunnel is the longest railway tunnel in Turkey and is the sixth longest railway tunnel in the world, and constructed with no side approaches. The tunnel has a cut and cover type section of 400 m long. For the time being the cut and cover section and the 8.000 meter of the rest of the tunnel are completed. The New Austrian Tunneling Method is used for tunneling and 1.200.000 m³ of tunneling excavation, 2.600.000 m³ of open excavation, 450.000 tons of shotcrete, 6.700 tons of steel ribs, 6.100 tons of anchorage, 1.500 tons of wire mesh and 210.000 m³ B225 tunneling concrete works are included within the project scope.
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