The project concerns the intersection of new provincial road N471 with Randstad Railway’s 100 year old railway embankment on the border between Berkel & Rodenrijs and Pijnacker,
later expanded with bicycle bridges running parallel to the railway.

Project information




Berkel & Rodenrijs




Mario van de Wildenberg

Project size

Start of project


Consulting services

Structural design, detail drawings and calculations

The angle of the road and railway crossing is about 60 degrees. The lower passage is constructed as a two lane highway that can be expanded with another two lanes. The railway deck is made of a pre-stressed concrete trough with rails cast into it. The deck has been built next to the railway embankment and inserted during a weekend when the railway was temporarily put out of service. One of the bicycle bridges is made out of reinforced concrete, the other out of steel. The abutments are founded on Tubex piles and anchored to securing structures in the embankment’s slope. The tunnel consists of reinforced concrete deck and walls, and is founded on tension piles.

Among special project circumstances were:
Difficult water management due to the polder location, where ground water is just below ground level and approximately four meters above polder level in the railway embankment;
Spring water as a consequence of confined ground water;
Very loose sand in the railway embankment;
The esthetical requirements to the shape and appearance of the concrete structures. To this end, the structures’ design includes curved walls, a ridged character and coloured concrete.

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