Gotthard-tunnel, Switzerland

With two tubes each 57 km long, the Gotthard base tunnel will be the longest tunnel in the world after its completion in 2017. Until then the gigantic tunnel boring machines still have to dig through many different types of rock. 

Four gripper tunnel boring machines are used to excavate over 24,000,000 tons from the depths of the Alps for the construction of the Gotthard base tunnel. Here gripper cylinders from Montanhydraulik are used.

Hydraulic cylinders:

  • piston diameter: 500 mm
  • total stroke: 2,300 mm