TECHNICAL TOURS

Oosterweel connection – Immersed tunnel

Though geographically small, Belgium has a remarkably diverse tunnelling landscape that reflects both its historical legacy and modern-day innovation. With a long-standing need to develop underground infrastructure in densely populated and geologically varied areas, Belgium has accumulated extensive experience across nearly all tunnelling techniques. 

 

Major projects like the Oosterweel Link in Antwerp — one of Europe’s most ambitious mobility initiatives — and the development of urban metro systems in major cities demonstrate the country’s expertise in integrating tunnels into complex environments. 

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Oosterweel connection – Cut and Cover canal tunnels

This tunnel section is built using the cut-and-cover method along the Albert Canal, combining infrastructure integration with urban and environmental measures to limit surface disruption. In 2027 you can walk on some sections of the tunnel floor, 20 meters deep in the canals.
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Brussels Metro – Toots Thielemans Station

A new metro station in central Brussels, designed to improve capacity and accessibility while addressing complex underground construction challenges in a dense urban environment.
See how the station was built

Pre-Metro in Antwerp

The Antwerp premetro network is a nearly 50-year-old underground tram system, which is undergoing major refurbishment because much of the infrastructure has significantly aged. Structural issues such as degraded tunnel lining, non-waterproof sections, and worn track beds require deep renovation rather than piecemeal repairs. In 2027, participants can expect to observe renovation works taking place nearby.

Underground lab in Mol/Dessel - High Activity Disposal Experimental Site (HADES)

The HADES Research Centre (High Activity Disposal Experimental Site) is a unique underground laboratory located in Mol, Belgium, at a depth of approximately 225 metres in the Boom Clay formation. Operated by EIG EURIDICE, a collaboration between the Belgian Nuclear Research Centre (SCK CEN) and the national radioactive waste agency ONDRAF/NIRAS, HADES serves as a long-term research facility for studying the safe disposal of high-level and long-lived radioactive waste. The laboratory allows scientists and engineers to investigate the geological, geotechnical, hydrogeological, and chemical behaviour of clay as a potential host rock, including its self-sealing properties, long-term stability, and interaction with engineered barriers.
HADES underground research laboratory

Westerscheldetunnel (NL)

The Westerscheldetunnel is a key 6.6 km road tunnel in the Netherlands connecting Zeeuws-Vlaanderen with the rest of the country. It carries thousands of vehicles daily and is critical for regional mobility and freight movement. In early 2027, a significant repair project is planned on the east tube due to a crack in the concrete across several segments. Experts have confirmed after investigation that the tunnel is safe, but repairs will be necessary in the long term.
See how the Westerscheldetunnel was built (Dutch)