GEWI® Piles stabilize Important Motorway Connection in the Netherlands
The A4 motorway is an important link between Amsterdam and Den Haag. Currently, the two lane section between Burgerveen and Leiden is being widened in order to eliminate the traffic bottlenecks that regularly occur in this area.
The widening of the A4 motorway also includes the construction of two aqueducts. The first aqueduct is located at the “Ringvaart” waterway. This new structure was built and completed at the end of 2010 next to an existing aqueduct. DSI Netherlands supplied approx. 1,500 GEWI® Piles for this part of the project.
At present, construction work is underway on the first part of the second aqueduct at the “Oude Rijn” River. The current bridge over the river will be replaced by two aqueducts. In this area, the A4 highway will run beneath the ground surface for a distance of approx. 1,440m.
In total, DSI supplied approx. 8,500 GEWI® Piles in lengths of 14.5m to 29m to prevent uplift of the highway due to groundwater pressure.
Two anchor plates were installed on the GEWI® Piles after the piles had been installed. One of the anchor plates was placed at the underwater concrete floor by divers. After the excavation had been pumped dry, the second anchor plate was installed on the construction floor.
Construction work began in 2009 and is scheduled for completion in 2013.