Blankenburg connection nominated for Schreuders Prize 2025!

Michel Heesen (architect on behalve of ZJA) says: 'The Blankenburg Connection is an inspiration for underground construction due to its innovative concept, which combines sustainability, integration, and minimal environmental impact. With sunken installations, the tunnels are integrated into the landscape, a service building is disguised as a barn, there are water-purifying reed beds, and the tidal nature reserve Gors van de Lickebaert has been redesigned. With all this, the project makes a significant societal contribution to the Rotterdam region in terms of mobility, spatial quality, sustainability, and climate resilience.'

Technical achievements

Technical achievements that set a new standard include the large-scale use of reinforced underwater concrete, two large sink tunnel elements with special ballast shafts, and 3D scanning of reinforcement underwater. Despite challenges such as the COVID-19 pandemic, the project maintained its high quality and progress.

Within the BAAK+ concept, innovative construction methods with high material efficiency have been used. For example, the deepcut & cover section of the Maasdeltatunnel with permanent combi-walls, a concrete stamp frame, and a very deep reinforced underwater concrete floor, built in a complex vertical phasing. Smart logistical solutions minimized environmental impact during construction.

Water safe

The Maasdeltatunnel is 200 years water-safe without the use of additional material. Risks were managed through pre-testing, 4D BIM preparation, and premeditated corrective control measures. Parametric models and scenario thinking supported a robust schedule and led to safe execution within time and budget.

Will we see you at DeFabrique on March 31?

On March 31, DeFabrique will host the anniversary conference of Centrum Ondergronds Bouwen (COB) (Centre of Underground Building), which, for 30 years, has been connecting professionals working with cables and pipelines, tunnels, and other underground space use. On this day, you can learn everything about underground construction.

Recent deliverables will be presented, technical stories shared, and interactive games played. Two presentations will be given on remarkable tunnel new builds - Zuidasdok and Oosterweel Connection – and the nominees for the Schreuders Prize will present their projects. More information can be found on the COB website.