Glossary.

The Herrenknecht method allows the trenchless jacking of a prefab pipe or pipeline in one step with concurrent excavation of the drill hole. The excavation of the soil is carried out with a microtunnelling machine. The pipeline is pushed forward by the Pipe Thruster; transmitting the thrust force, required for drilling, to the cutterhead.

Disks or disk cutters are rotating tools equipped with hardened cutter rings for hard rock tunnelling. During the advance of the machine, the disks are pushed against the rock and break off chips of rock.

main drive