Ceintuurbaan Station will run beneath Ferdinand Bolstraat between Albert Cuypstraat and Ceintuurbaan.

• The two tracks at Ceintuurbaan Station will run one above the other.
• There will be two entrances on Ferdinand Bolstraat: one on the corner with Albert Cuypstraat and one on the corner with Ceintuurbaan.
• Both entrances will be located in brand-new corner buildings.
• Some 35,000 passengers will be making use of this station everyday.
• Once the station is ready, Ferdinand Bolstraat will be given a face-lift.

Narrow, long and deep
To ensure that Ceintuurbaan Station will fit between the existing buildings on Ferdinand Bolstraat, a narrow, long and deep station is being built. The platforms will not be across from each other, but rather one above the other. Together, they will be 230 metres long, and they will be located at a depth of 16.5 and 26.5 metres, respectively. That is quite deep indeed: none of the other stations will be that far down.

Work in progress

Govert Flinckstraat to be closed from 7 to 11 May.
For resurfacing the bicycle lane and pedestrian pavement on Ferdinand Bolstraat, Govert Flinckstraat will be closed from Monday, 7 May, through Friday, 11 May, where it crosses the construction site. The resurfacing is necessary because the bicycle lane and pavement have sunk. The east side of the intersection going into Govert Flinckstraat will also be broadened for the benefit of cyclists.

Accessibility for traffic
Local traffic can drive down Govert Flinckstraat as far as the roadblock at Ferdinand Bolstraat, turn round again there and exit. Car traffic exiting on Govert Flinckstraat east of Ferdinand Bolstraat can also exit through Eerste Van der Helststraat.
Cyclists and pedestrians can make a detour and cross the construction site by way of Eerste Jan Steenstraat or Albert Cuypstraat.

Start of the excavation for Ceintuurbaan Station.
On 2 April 2007, the contractor of the Noord/Zuidlijn began excavating Ceintuurbaan Station. After all, this station – consisting of sidewalls, a base layer and a roof – is still filled with earth. The excavation will take place in three phases:

1. Digging trenches and pumping away the groundwater
2. Excavation to 6.5 metres below street level
3. Further excavation.

During the first phase, the contractor will be putting the fences back around the construction site on Ferdinand Bolstraat. Inside the fences, the contractor will create three openings in the roof of the station. From these openings, machines will dig holes to a depth of 6.50 metres below street level. This will take approximately two weeks. The contractor will place pumps in the holes to remove the groundwater from between the diaphragm walls. This process will take approximately four weeks. Once enough of the groundwater has been pumped away, the initial phase of construction will come to an end, and the second construction phase can begin.

In the second phase, the top layer of soil along the entire length of the future station will be excavated to a depth of 6.50 metres. To provide optimal reinforcement for the station, horizontal girders or struts will be put into place. These building activities are expected to last until the end of August 2007.

The third phase will begin in early September, when the station will be further excavated.

Vicinity
Just as before, the construction site will be located on Ferdinand Bolstraat between Albert Cuypstraat and Ceintuurbaan. In contrast to the earlier period, the current construction site will be considerably narrower. The bicycle lane and the pedestrian pavement on both sides of Ferdinand Bolstraat will remain intact. The openings for traffic from the side streets will return as well, so that just as before, car traffic will be able to cross at Govert Flinckstraat, Eerste Jan Steenstraat and Eerste Jan van der Heijdenstraat.

Although this phase is expected to be less disruptive, it will still lead to some inconvenience: primarily due to the lorries that will be carrying away the soil. Also, the contractor will be digging through an 8-metre thick layer of peat, and this may release an unpleasant odour.

Roof of Ceintuurbaan Station is finished
The roof of the future Ceintuurbaan Station is finished. The roof is made up of 13 different sections. The contractor began in the middle of the station. For each section, the soil was first excavated to a depth of about 2.5 metres below street level. Then a work floor was made on which the steel reinforcing was arranged. The concrete was poured on top of this, and once it had dried, the roof was covered with sand.

Jet grouting is finished
Using a special technique known as jet grouting, a reinforcing layer was created at a depth of some 33 metres below Normal Amsterdam Water Level (NAP). This sturdy layer will ensure that the diaphragm walls remain in place. During jet grouting, a mixture of water and cement is injected into the ground under high pressure. This mixture hardens to form a concrete-like substance.

Ferdinand Bolstraat is accessible
Although Ferdinand Bolstraat is closed for traffic between Albert Cuypstraat and Ceintuurbaan, it will remain accessible for pedestrians and cyclists.