Optimisation of the Tangebeek collector

The collector was in poor condition and was partly renovated and partly rebuilt, either in open trenches or by means of thrust boring. This method was used in the existing nature reserves and near the entry and exit complex. To meet modern hydraulic requirements, 12 overflows, 3 underground storage basins and one open buffer basin were built. An extensive project of more than 5 kilometres of sewerage was connected to each other to guarantee the drainage for 33,000 people. During all this, the collector remained permanently active. This makes this project one of the largest non-combined sewerage projects for both Aquafin and BESIX Infra.

An alert BESIX Infra team permanently maintained the existing water management system through well-designed pumping works. Ecologically sound construction site roads ensured maximum accessibility to wet meadows and forests.

The redevelopment required a fine example of soil mechanics. Well-designed foundation and drainage techniques were used to tackle the groundwater level and the unstable aquifers. They have ensured the preservation of not only the nature area but also the surrounding buildings. The relining technique used to retain the existing sewerage and drainage system included a sleeve made from fibre-glass and epoxy resin and has resulted in a sustainably renovated sewerage and drainage network.

BESIX Infra is committed to minimising disruption during the works. Well thought-out diversions guaranteed the accessibility of the entire route throughout the entire work period. In addition, clear information boards ensured clear communication with residents and other parties involved.