Hamburg Hosts STUVA 2025

Nearly 4,500 people gathered at the Congress Centre Hamburg in Germany Nov. 25-27 to attend the STUVA Conference 2025, among the world’s largest trade fairs for tunnels and infrastructure.

For three days, the focus was on the major current issues facing the industry: sustainability and CO₂ reduction, digitalization and BIM, safety and availability, energy corridors and urban mobility – all with the informal conference atmosphere that makes the STUVA conference something very special every two years.

After the opening ceremony, participants split into parallel sessions. The tunnel construction segment initially spotlighted major projects: railway tunnels, energy corridors, and new utility tunnels emerging as critical infrastructure. Later, the focus shifted to sustainability and CO₂ reduction – not as a buzzword, but as a tangible engineering challenge. Discussions ranged from the reuse of excavated material to the potential of geothermal energy and the role of steel fibre reinforcement in resource-efficient linings. Attentive listeners realized: this is about more than technology – it’s about a new self-concept for tunnelling, combining efficiency with environmental responsibility and embracing every technical innovation available.

The tunnel operation track was equally well attended. Topics spanned safety and risk mitigation, tunnel availability, and ventilation concepts – such as dew point control in the Saukopf Tunnel or cooling strategies for the Future Circular Collider in Geneva. Overarching all was the theme of digitalization: BIM, digital twins, AI-driven information processing, and robust communication networks.

A common thread linked both streams: sustainability and energy. Decarbonizing cement and concrete, ecologically assessed tunnel linings – these were not side issues but integral to strategic planning.

Alongside the presentations, the STUVA Expo covered around 7,000 sq m (75,000 sq ft). Here, 182 exhibitors showcased what they have to offer the industry – from machinery manufacturers to specialist foundation engineering and service providers.

Another highlight of STUVA was the champagne and gala dinner, offering a relaxed atmosphere for social and professional exchange.

After two days of exhibition halls and lecture rooms, the third day brought a complete change: off with the business suit, on with the boots! Carefully curated technical excursions awaited those lucky enough to secure one of the coveted spots. Participants enjoyed exclusive tours of major construction sites and projects – some in areas normally off-limits – always guided by project managers, many of whom had attended the conference themselves. Highlights included the final structural works of the U4 Horner Geest extension, the first sites of the U5 mega-project, the XFEL/DESY particle accelerator, the segment tunnel of the ElbX crossing as part of SuedLink, and more. The most elaborate tour, with a 2.5-hour bus ride, took participants to the Fehmarnbelt Tunnel megaproject, visiting both the German and Danish construction sites. When this group returned to Hamburg in the evening, the 2025 STUVA Conference was officially over.

The next STUVA Conference is set for Dec. 8-10, 2027, in Munich.

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