Next Generation of Hybrid TBMs for Mixed Ground

The use of hybrid TBMs in a mixed and unpredictable underground environment is increasing. This report concentrates on the advances achieved by hybrid TBMs, focusing on what is likely the most common type: A cross between a hard rock single shield TBM and an EPB.

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Issue 2013-03

Next Generation of Hybrid TBMs for Mixed Ground

In a mixed and unpredictable underground environment the increasing use of hybrid TBMs is one that goes with the territory. Where multiple machine types might have once been used for different...

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Issue 2011-02 Switzerland

Breakthrough at Weinberg Tunnel in Zurich

The Weinberg Tunnel in Zurich, part of Swiss Federal Railways’ “Diameter Line Project”, was successfully broken through on 22nd November 2010. After boring a total of 4,382 m the convertible TBM...

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Issue 2014-02

The Robbins Company

If the tunnel-geology ranges from soft soils to weathered rock, the Robbins Company offers a solution: The Earth Pressure Balance Machine (EPBM). EPBMs are built for durability and longevity with a...

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Issue 2011-04 Russia

Double Shield sees the Light in Sochi

In early March 2011, a 6.2 m (20.3 ft) diameter Robbins Double Shield TBM crossed the finish line in Sochi, Russia. The machine completed a 4.5 km (2.8 mi) long section of tunnel that will ultimately...

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Issue 2019-02 Turkey

TBM-Excavation of Turkey’s longest Water Tunnel

Excavation of Turkey’s longest water tunnel came to an end in December 2018. To get there, a 5.56 m diameter Robbins Crossover (XRE) TBM and the contractor JV of Kolin/Limak had to overcome dozens of...

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