PROJECT

The Flemish city of Kortrijk has been developing sustainable projects for years within its ‘Kortrijk, climate city’ programme. One of the latest projects is the makeover of the station area. Kortrijk is redesigning and optimizing the neighbourhood to make more room for pedestrians, cyclists and public transport. Jan De Nul has just slid the new bus and bicycle tunnel into place, thus meeting the needs of the primary users perfectly: a safe and car-free connection between Kortrijk-Zuid and the city centre.

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1

For this sliding operation, we built a section of the tunnel next to its final position, because the tracks under which this tunnel was placed could only be broken up for a very short time.

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2

Weeks before the actual sliding operation, the prefab bus and bicycle tunnel was completed right next to the tracks. The result: a 35-metre and 1,350-tonne tunnel. Just before we slid the tunnel into place, Infrabel installed a temporary railway bridge and broke up all the other tracks. Only one track remained operational. We then excavated the soil under the former tracks to create an open building pit. After that, the team on site could jack up the tunnel, put it on rails and slowly slide it into place horizontally.

3
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The total weight of the tunnel is 1,350 tonnes

1,350 tonnes

 

To lift and slide the tunnel into place,
10 concrete support blocks were provided.

10

The tunnel was finally slid into place in
8 hours time.

8 hours

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Framework for the Kortrijk Station Project

This sliding operation is part of the Kortrijk Station Project, a partnership between the SNCB/NMBS, Infrabel, De Lijn, the city of Kortrijk, the Roads and Traffic Agency and Parko. Eurostation is the design agency. The total project will take about 10 years.

With this project, Kortrijk wants to transform the station area into a pleasant neighbourhood again, by optimizing the mobility for various road users. First of all, special attention is being paid to the needs of vulnerable road users (pedestrians and cyclists). Secondly, public transport is taken into account, and thirdly private transport. In this project, we built the bus and bicycle tunnel so that scheduled buses and cyclists can now pass through unhindered and completely safely.

 

The tunnel is
35 metres long,
12 metres wide and
6 metres high

35 METRES 
3. image

We already have a lot of experience with similar sliding operations, but the dimensions of this tunnel aren’t very common. In order to slide such a long tunnel on rails, it was supported by concrete blocks. When the tunnel was in its final position, we supplemented the earth around the tunnel and finished the tunnel on both sides.

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Wondering how we performed the works?

video interview
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Kenneth De Visch - Project manager civil works, takes you on a tour behind the scenes.

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Title

HOW DO YOU SLIDE A 35-METRE TUNNEL INTO PLACE?

PROJECT

overzichtsbeeld.jpg
0p1a3198.jpg (copy)

The Flemish city of Kortrijk has been developing sustainable projects for years within its ‘Kortrijk, climate city’ programme. One of the latest projects is the makeover of the station area. Kortrijk is redesigning and optimizing the neighbourhood to make more room for pedestrians, cyclists and public transport. Jan De Nul has just slid the new bus and bicycle tunnel into place, thus meeting the needs of the primary users perfectly: a safe and car-free connection between Kortrijk-Zuid and the city centre.

Wondering how we did it?

video interview
0p1a3355.jpg (copy1)

Kenneth De Visch - Project manager civil works, takes you on a tour behind the scenes.

3. image

We already have a lot of experience with similar sliding operations, but the dimensions of this tunnel aren’t very common. In order to slide such a long tunnel on rails, it was supported by concrete blocks. When the tunnel was in its final position, we supplemented the earth around the tunnel and finished the tunnel on both sides.

dji_0103.jpg
1

For this sliding operation, we built a section of the tunnel next to its final position, because the tracks under which this tunnel was placed could only be broken up for a very short time.

2. image
2

Weeks before the actual sliding operation, the prefab bus and bicycle tunnel was completed right next to the tracks. The result: a 35-metre and 1,350-tonne tunnel. Just before we slid the tunnel into place, Infrabel installed a temporary railway bridge and broke up all the other tracks. Only one track remained operational. We then excavated the soil under the former tracks to create an open building pit. After that, the team on site could jack up the tunnel, put it on rails and slowly slide it into place horizontally.

3
adobestock_215407471....

Framework for the Kortrijk Station Project

This sliding operation is part of the Kortrijk Station Project, a partnership between the SNCB/NMBS, Infrabel, De Lijn, the city of Kortrijk, the Roads and Traffic Agency and Parko. Eurostation is the design agency. The total project will take about 10 years.

With this project, Kortrijk wants to transform the station area into a pleasant neighbourhood again, by optimizing the mobility for various road users. First of all, special attention is being paid to the needs of vulnerable road users (pedestrians and cyclists). Secondly, public transport is taken into account, and thirdly private transport. In this project, we built the bus and bicycle tunnel so that scheduled buses and cyclists can now pass through unhindered and completely safely.

symbolentrans-01-01.png

The tunnel was finally slid into place in 8 hours time.

8 hours

 

To lift and slide the tunnel into place, 10 concrete support blocks were provided.

10

The total weight of the tunnel is 1,350 tonnes

1,350 tonnes

symbolentrans-01.png (copy2)
symbolentrans-01.png (copy1)
symbolentrans-01.png (copy)

 

The tunnel is
35 metres long,
12 metres wide and
6 metres high

35 METRES 
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