PROJECT PDF
 
 
 
Willemen Groep
Boerenkrijgstraat 133, BE - 2800 Mechelen
tel +32 15 569 965, groep@willemen.be
 
Canal bridge - Strepy-Bracquegnies
 
 
Activities
Civil Engineering
Bridges
Water engineering
 
Contractor
Franki
 
Special features
Le pont-canal du Sart permettra le franchissement par le canal du Centre de la vallée du Thiriau du Sart ainsi que de l’important carrefour routier entre la N 55 et la N 535 situé à proximité de l’accès à l’autoroute E19 Bruxelles-Paris
 
Location 
Strepy-Bracquegnies, Hainaut, Belgium
 
Client
Ministère Wallon de l’Equipement et des Travaux – Direction des Voies Hydrauliques de Mons
 
Price
€22.500.000
 
Temporary partnership
Franki, CFE, Bageci
 
Engineering Office
Greisch
 
Construction period 
4 years 10 months
 
Start work 
01-1999
 
End of work 
11-2003
 

Crossing an almost 500 m valley at a height of between 12 and 20 metres with a waterway of 33 metres working width and 4.15 metres draught. This requires an imposing, if not overwhelming piece of engineering. To integrate this work into its environment, the BEG architectural consultancy opted for a simple, repetitive and visually restful structure, rather than an artificially complicated project seeking to be forgotten by plays of shapes and colours. The consultancy insisted, however, on top quality execution with no open construction joints visible on the exposed faces. To avoid a crushing impression, it spaced the columns 36 metres apart, an unusually wide span for this type of work that needs to support more than 4 tons per square metre. The result is a project consisting of two inclined side walls comprising variable curvatures with a total height of 7.1 metres.  498 metres long, these are cast in a single piece to reduce the number of expansion and sealing joints. On these longitudinal carrying elements are then set, every 4.5 m, 27 metre long fishbelly cross-members, which support the canal floor slab. In this way the waterway has a total width of 46 metres at its base and a height of 7.1 metres, resting on two rows of 14 columns each - one row per side wall – set 36 metres apart longitudinally and 33.4 metres cross-wise.

The columns
Key figures.
Superstructure:

  • concrete : 25,800 m³
  • reinforced steel : 3,350 t
  • prestressed : 875 t

Infrastructure

  • concrete : 9,100 m³
  • reinforced steel : 850 t

Foundations

  • reinforced steel : 250 t

Earthworks

  • clearing: 370,000 m³
  • filling: 320,000 m³

The Sart canal bridge is the world's heaviest incrementally launched bridge, with the moving mass reaching 65 tonnes at the end of the sliding process.
At the same time, the huge longitudinal inertia of the deck combined with severe aesthetic constraints led the engineering team to devise technical solutions that are not standard for launched bridges.

Franki

Chemin des moissons, 10
4400 Flémalle, Liege (Belgium)
tel +32 4 2505150 | +32 4 3493939
info@franki.be
www.franki.be

Since 1998 Franki has been part of Willemen Groep, the largest family construction group in Belgium.
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