For the 'Combiplan Nijverdal' project, VSF installedthe grout anchors and GEWI piles.
The overall project included the construction of a tunnel and entrances for relocating the N35 and the Zwolle - Almelo railway line.
The main road and the railway line are located together in a submerged trough. The construction pit is built from sheetpiles, and the floor anchored with GEWI piles.
The strand anchors were installed with two Klemm anchor drilling machines. Subcontractor Bauer inserted the GEWI piles after excavationl from a pontoon.
A total of almost 1,600 anchors with a maximum length of 42.5 metres and roughly 3,600 piles with a maximum length of 25 metres were used.
The tunnel was opened in 2013.