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Tunnelling

Tunnel construction is an essential part of modern infrastructure and requires the highest level of technical expertise and many years of experience. Whether conventional tunneling, mechanical tunnel construction, or tunnel renovation and widening, we rely on proven and innovative methods to develop customized solutions for both small and large infrastructure projects. Depending on the project requirements, our team of specialists works independently or in working groups to achieve the greatest possible benefit for our customers in every phase of the construction project.

Mechanical tunnelling

Tunnel boring machines are particularly efficient when they can be used over longer distances and the geological conditions do not vary too greatly. In addition to efficiency, mechanical tunnel construction impresses with its high degree of automation.

This allows the tunnel to be secured with tubbings (prefabricated concrete segments) immediately after excavation, which in most cases also serve as the interior lining. Alternatively, in stable rock conditions, the tunnel can also be secured with shotcrete.

Conventional tunnelling

Blasting and excavation methods are usually used when the tunnel lengths are short or the rock conditions vary greatly. Conventional tunnel construction is very flexible and can be adapted to the conditions encountered at any time. In most cases, after securing the tunnel with shotcrete and anchors, an inner shell made of in-situ concrete is installed.

Railway engineering

As a specialist in railway technology, we completed the challenging Gotthard Base Tunnel railway project. Our core competence in this project was the construction of special track systems such as slab tracks and mass-spring systems. These systems are used wherever the rail network has to meet high and complex usage and construction requirements.

Our projects

We serve our clients in Switzerland and abroad with total commitment – competently and fairly!

Overview of our projects
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