De Groene Boog, a consortium comprising Besix, Dura Vermeer, Van Oord, John Laing, Rebel and TBI, has been commissioned by Rijkswaterstaat to design and build a new ring road in Rotterdam North. A flyover will be constructed at Terbregseplein, after which the road will continue a few hundred metres further in a semi-underpass beneath the Rotte river. Hendriks developed and supplied pillar formwork for the flyover. Hendriks was also responsible for the tunnel formwork used for the sunken tunnel.
Anyone who regularly travels or listens to traffic reports will undoubtedly be familiar with Terbregseplein, one of the busiest traffic junctions in the Netherlands. There are traffic jams almost every day on the A13 near Overschie and the A20 between Kleinpolderplein and Terbregseplein. Because road users try to avoid these traffic jams, local roads also become congested. To improve accessibility to Rotterdam and the quality of life for residents living near the A13 and A20, a direct connection between the two motorways is being constructed.
This Green Arch encircles Rotterdam North. The project puts the latest insights in the field of liveability and sustainability into practice. The road will be integrated into the landscape as seamlessly as possible and will be energy neutral. Noise pollution will be minimised through the use of extra noise-reducing asphalt.
As part of De Groene Boog, a flyover will be constructed at Terbregseplein, with the road surface being moved over the existing infrastructure as a kind of front structure without obstructing traffic. This is the first time that this Incremental Launching Method has been used in the Netherlands. The total length over which the road surface will be moved is 400 metres in each direction. Twenty pillars will provide the necessary support for the road surface.
Hendriks developed, engineered and supplied formwork for the pillars in close collaboration with De Groene Boog. André Boeren, senior site manager at De Groene Boog, explains: “The formwork allows pillars of different lengths to be cast. The pillar heights vary from 8.50 to 13.40 metres.” The formwork is mounted on a truss structure attached to a concrete slab and supported on all sides by struts.
"The pillars have a trapezoidal profile that is bolted to the formwork," explains André Boeren. "The architect wanted the profile to end exactly 10 cm below the top edge. Because the pillars also have different heights, we are using several trapezoidal profiles of varying lengths. This allows us to remove the formwork from one pillar every two weeks and reinforce and formwork the next.”
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