The longest tunnel in the Netherlands: The Gaasperdammer tunnel

On behalf of Rijkswaterstaat, IXAS Zuid-Oost consortium (Ballast Nedam, Fluor, Heijmans and 3i Infrastructure) is constructing the longest and one of the widest tunnels in the Netherlands.

Implementation period: 2015 – 2020
Inscription sum: Approximately 700 million Euro including 20 years of management and maintenance.

The tunnel is situated on the A9 highway and is part of the Schiphol-Amsterdam-Almere (SAA) project. The route of SAA is about 60km long and runs through the A9-A10-A1 and A6. With a total length of 3,024 meters, this tunnel is the longest one in the Netherlands. Besides, this land tunnel is the second widest tunnel in the Netherlands with a width of 73 meters. The Gaasperdammer tunnel is being constructed with 5 tubes with a total of 11 lanes (and 2 lanes for reservation). The outer tubes each consist of 3 lanes, the inner tubes both get 2 lanes (each one gets one lane for reservation), the middle tube will be used during rush hours and gets 1 lane. The length of the tubes vary from 500 to 3,000 meters. This tunnel will improve the flow and travel time significantly and at the same time will also have a positive effect on the surroundings. On top of this tunnel a large park will be constructed, twice the size of the Vondelpark.

Infraconcepts can make a significant contribution to the design team, thanks to the expertise in the field of Rijkswaterstaat materials, combined with the service, reliability and innovative ability. Infraconcepts has gained considerable experience in previous tunnel concepts with projects such as the Ketheltunnel (A4 Delft-Schiedam) and the Koning Willem-Alexandertunnel (A2 Maastricht). As system integrator Infraconcepts supplies all the necessary fiber optic telecommunication- and data cables and associated components.

Unique to this project is that beside the use of the standard 144-fiber backbone VICnet cable, a Direct Burried multiduct system is installed in which 12-fiber mini-cables are blown to the Local Transmission Network. All glass fiber panels and data patch panels are preassembled and delivered to panel manufacturers. As a result, they are pre-assembled in the cabinets in a clean and quiet environment, which also gives a considerable time gain. The project team is constantly informed about the planning to make sure that the materials are delivered just in time to prevent stagnation during the work.