For underground connections
Tunneling is one of the most demanding disciplines in construction engineering and also happens to be one of Out Sourcing engineering core competencies. Underground construction requires specialist expertise, innovation, flexibility, and a talent for technological solutions. In addition to the priority of conserving the environment and resources.
The key factors for Out Sourcing Engineering include occupational health and safety and quality.
As a reliable partner we have a strong track record with our technical expertise in every common tunneling method (gripper TBM, open shield, EPB and hydro shield) as well as with cross sections from 5 to 15 meters.
Service range tunneling
Our service range stretches from building traffic tunnels such as road, metro and railway tunnels, along with infrastructure facilities, right through to the supply of drinking water.
District heating pipes, wastewater pipes and cable ducts along with other underground construction such as galleries, shafts, caverns or hydraulic engineering complete the range.
We employ different technologies to mention a few:
- Conventional tunneling (cyclical) using the New Austrian Tunneling Method (NATM)
- Mechanical (continuous) tunneling with tunnel boring machines (TBMs) with diameters of 2.5m to more than 13m
- Tunneling with a hard-rock TBM (gripper machine) with subsequent inner lining of in-situ concrete
- Tunneling with shield TBM with simultaneous single-layer segmental lining or double-layer with segments and in-situ concrete lining
- Hydro-shield tunneling: tunneling with a slurry-supported working face, segmental lining
- Earth-pressure-balance shields (EPB) with face support by balancing the earth pressure, segmental lining
- Multimode tunneling with alternating operating modes (EPB/slurry-supported/open), segmental lining
- Mechanical tunneling with tube extrusion technology with partial or full section methods, using a slurry-supported working face if necessary, tube diameters from 1.5m to more than 4m
