Tunnelling

We are active worldwide for you
in tunnelling.

Wayss & Freytag is one of the leading companies in international tunnelling. With over 150 years of experience and a large number of successfully realised projects worldwide, we stand for technical excellence, innovative strength and the highest safety standards.

Our range of tunnelling services includes both mechanised and conventional construction methods. In addition, our project portfolio also covers challenging immersed tunnels and complex inner-city transport facilities - always with the aim of delivering customised solutions for construction tasks, we create connections all over the world.

Innenansicht einer Tunnelbohrmaschine (TBM): Blick nach vorne auf mechanische und hydraulische Komponenten

Mechanised tunnelling

Innovation underground

In the development of mechanised tunnelling technology, Wayss & Freytag has made a significant contribution to the maturity of the hydro shield.

Wayss & Freytag is a pioneer of this technology and has now excavated more than 215 km of tunnels with hydroshields.

This technology enables safe tunnelling in difficult geological conditions. With over 210 km of tunnels, as well as a further 99 km with earth pressure shields and 44 km with hard rock tunnelling machines, we have extensive experience.

Conventional tunnelling

Experience meets engineering expertise

Conventional tunnelling has always been a supreme discipline in civil engineering. Wayss & Freytag took on this challenge back in 1905 with the construction of a railway tunnel using the mining method. Today, our spectrum ranges from loose rock tunnelling to compressed air tunnelling and blasting. Our reference projects demonstrate our expertise in geological assessment, the selection of suitable support methods and the implementation of complex support concepts.

Cut and Cover

Cost-effective and efficient

Where geology and traffic conditions permit, we use the cut and cover construction method. It enables the cost-efficient realisation of troughs, cover structures and access ramps. Especially in inner-city areas, this method offers advantages in terms of construction time, accessibility and integration into existing infrastructure.

Immersed tunnels

Underwater construction with precision

The immersed tunnelling technique is a tried and tested method for tunnels under bodies of water. Prefabricated concrete elements are produced in a dry dock, sealed watertight and then positioned in the bed of the water with millimetre precision. This construction method enables fast, weather-independent implementation and minimises interference with the environment. The Fehmarnbelt tunnel or the Weser crossing in Bremen are examples from our project portfolio that were realised as immersed tunnels.

Tunnel technology & tunnel refurbishment

Sustainable and future-proof

In addition to new construction, we also take care of the maintenance and modernisation of existing tunnels. Our services include the renewal of technical systems, the refurbishment of structures and the adaptation to current safety standards. With a holistic view of the life cycles of infrastructure, we ensure that tunnels remain safe and efficient in the long term.