Strukton to realise Conradkade substation in The Hague

11 February 2014

Strukton was recently commissioned by HTM Personenvervoer NV to realise a substation on Conradkade in The Hague. This substation will supply electricity to tram lines 3, 11 and 17. Workers started preparing the site on 6 February.

A substation is an electrical component of a high-voltage network. It connects two or more high-voltage networks or forms a node within the high-voltage network. Strukton will ensure that the new substation is embedded below street level and integrated with the quay wall. This will allow for a more effective integration in the surrounding area.

The project has been divided into three contract sections, which are handled by Strukton, Imtech and Cegelec respectively. Strukton is responsible for the station’s structural and civil engineering. One interesting aspect of this project is that the contractors will be working with underwater concrete. The underwater concrete blinding will be realised in an open foundation dig known as a wet excavation pit.

In addition, the project presents a challenge in terms of logistics. The site is located on Laan van Meerdervoort, the longest and busiest road in The Hague. Since the materials need to be transported to the site via one of its junctions, the contractors have decided to work after regular business hours. The main transport hauls will be organised at night to keep nuisance for local traffic and residents to a minimum.

Strukton has been ordered by HTM to employ methods that limit noise nuisance for people living in the vicinity of the site as far as possible. For example, the steel sheet piling will be pressed into place, and the anchoring piles will be bored rather than driven. To locate existing anchors, Strukton has opted for a combination of boring and high-frequency vibration.