This 2-track viaduct rests on 34 piles, the highest of which is 23 metres high. Its foundations required the installation of some 55,000 m of micropiles and 30,000 m of screw piles.
Custom-built formwork was used for constructing the bridge piles. Each pile head weighs 80 t and is 8 m wide (iris elements) Due to strict planning requirements, the site had two complete sets of these formworks and supports.
Two prefabricated slabs (±120 t) and a head made of in-situ concrete form the connection between the two “irises” of a pile. Once these have been made, U-shaped troughs fill the space between the piles, acting as the base on which Infrabel lays the track.