AF has performed construction and securing of tunnels between Arguinequin and Puerto Rico at Gran Canaria for Obrascon Huarte Lainer (OHL).
The contract involved the construction and securing of nine tunnels on the new motorway along the south coast of Gran Canaria. In total approx. 4.8 km tunnel with cross section of 75 m2 was driven and secured in 15 months.
The work was carried out in co-operation with a local machinery contractor. The type of rock the tunnels went through was lava, partly with a low mechanical strength. The work on securing the tunnel was comprehensive with approx. 34,000 rock bolts and over 31,000 m3 of shotcrete being used.
The work was carried out in 3/4 of the planned time.
||January 2000 - December 2002
||Obrascon Huarte Lainer (OHL)
||Puerto Rico, Spania
||NOK 135 mill.
||Tunnels: 4.8 km, Cross section: 75 m2, Rock bolts: 34,000, Shotcrete: 31,000 m3