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Tunnel boring machines, Tunneling equipment

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Tunnel boring machine earth pressure balance - ø 1.7 - 16 m | EPB Shield

For soft, cohesive soils tunnel boring machines with earth pressure support are a preferred option. So called Earth...

Tunnel boring machine earth pressure balance - ø 1.7 - 16 m | EPB Shield

For soft, cohesive soils tunnel boring machines with earth pressure support are a preferred option. So called Earth Pressure Balance Shields (EPB) turn the excavated material into a soil paste that is used as pliable, plastic support medium. This makes it possible to balance the pressure conditions at the tunnel face, avoids uncontrolled inflow of soil into the machine and creates the conditions for rapid tunnelling with minimum settlement.

Tunnel boring machine mixshield TBM - ø 4.2 - 19 m | Mixshield

The Mixshield technology developed by Herrenknecht is an advance on conventional slurry technology....

Tunnel boring machine mixshield TBM - ø 4.2 - 19 m | Mixshield

The Mixshield technology developed by Herrenknecht is an advance on conventional slurry technology. The support pressure in the Excavation chamber is precisely managed using an automatically controlled air cushion. This means that heterogeneous geologies and high water pressures of more than 15 bar can be controlled safely even with very large excavation diameters.

Tunnel boring machine single shield TBM - ø 1.5 - 14 m

Single Shield TBMs are the ideal machine type for tunnelling through rock...

Tunnel boring machine single shield TBM - ø 1.5 - 14 m

Single Shield TBMs are the ideal machine type for tunnelling through rock and other stable, non-groundwater-bearing soils. Due to the typical tunnelling methods with segmental lining or pipe jacking, high tunnelling performances can also be achieved in rock formations with low stand-up times.

Tunnel boring machine double shield TBM - ø 2.8 - 12.5 m

Double Shield TBMs are among the most technically sophisticated tunnel boring machines. They unify the functional principles...

Tunnel boring machine double shield TBM - ø 2.8 - 12.5 m

Double Shield TBMs are among the most technically sophisticated tunnel boring machines. They unify the functional principles of Gripper and Single Shield TBMs in one machine. Under stable geological conditions, the combination of methods allows for the installation of concrete segments parallel to tunnelling, achieving very high tunnelling performances. This powerful technology is therefore perfectly suited for excavating long tunnels in hard rock.
Advancing with power

Tunnel boring machine - ø 2 - 12.5 m

Herrenknecht Gripper TBMs have proven to be efficient solutions for fast mechanized tunnelling in hard...

Tunnel boring machine - ø 2 - 12.5 m

Herrenknecht Gripper TBMs have proven to be efficient solutions for fast mechanized tunnelling in hard rock on many occasions. Due to the process-typical rock support method without segments, medium to high rock strengths are a requirement for high advance rates. In more fractured geological formations, various systems for immediate rock support behind the cutterhead are installed at the TBM directly.

Single-disc cutter for tunnel boring machine (TBM)

Shield tunnels build numerous lifelines such as water supplies, sewerage systems, subways,...

Single-disc cutter for tunnel boring machine (TBM)

Shield tunnels build numerous lifelines such as water supplies, sewerage systems, subways, networks, fuel transportation and storm water storage. Tungaloy provides shield bits for excavation that have an excellent durability and digging performance that is guaranteed by the high quality tungsten carbide and extensive industry experience of Tungaloy staff.