Drill & Blast Tunnelling
Conventional Drill & Blast tunnel-driving in rock as well as the Shotcrete Method (NATM) are used in many projects.
Our extensive experiences covers drill & blast excavation methods with all dimensions and tunnel lengths: full face excavation, top heading and bench excavation and additional subdivisions including side wall drift.
Mechanically assisted tunnelling in soft ground
In mechanically assisted tunnelling in soft ground, auxiliary constructions measures are often used.
Our experiences covers the whole spectrum and the combinations of the different auxiliary construction measures in the soft ground:
Spile umbrella / Pipe umbrella / Jet grouting / Ground freezing / Side wall drift / Grouting / Long face anchors / Drains (drillholes)
Tunnel projects often receive a permanent lining of high-quality concrete.
Our experience covers the production of heavy steel formwork as well as the execution of the corresponding waterproofing, reinforcement and concrete work.
Tunnel Boring Machines were driven in hard rock and in soft ground.
We have competences in slurry and EPB shields with segments.