Tunnel construction
FDN performed the complete engineering of a bike- and pedestrian tunnel
underneath the railway of Randstadrail. FDN was responsible for the entire
design of the tunnel. The tunnel deck was build next to the railway and
afterwards moved to its definite position in one day. This project
provided FDN Engineering with a lot of knowledge about moving and/or
sliding possibilities of a deck.

Tunnel near Houtkade: randstadrail
Dordtsekil
In assignment of ‘HSL South-Holland-South’ FDN has done research on the
structural design of a tunnel for the high speed railway line.

Dordtsekil
Other Projects
Our expertise does not only lie in the engineering of structures above
ground, but also in the foundation below. The need to support and retain
the soil and water in temporary or permanent situations is very essential
in Dutch engineering projects. FDN’s experience in this field speaks for
itself: pile foundations and piles (in 2D and 3D calculations), steel
retaining walls, reinforced concrete retaining walls, combination
retaining walls (sheet piles and tubes), harbour walls and quays, soil
stability and settlement calculations.

Excavation of building pit after realising an underwater concrete floor

Retaining wall tram line, Amsterdam (2002)

Piles High-speed train line (2002)

Piles including concrete plate (2002)