Projects

Rengelbur Ecoduct (wildlife crossing)

2010 - 2012
Plateau Heeschdreferbierg

Category

Civil Engineering

A wildlife crossing on the Route du Nord

Construction of the “Rengelbur” wildlife overpass as part of the construction of the Route du Nord on the W interchange section.

With a length of 150m, the overpass consists of a double open frame type structure in reinforced concrete and has three juxtaposed tunnels. The central tunnels carry the Route du Nord and Mersch bypass traffic, while the west tunnel takes over the two-way traffic from the diverted N7. 

The wildlife crossing was built using the cut and cover method. In other words, the work involved conventional excavation for the tunnel frames, followed by backfilling around and on top of the slab in order to restore the local vegetation. 

The rounded shape of the discharge outlets meets the crossing requirements for large animals. 

172,000m3

Excavated materials

36,500m3

Backfill

12,000m3

Reinforced concrete

1,400t

Steel

Key figures

Width between the side and central walls

12.10m 

Clearance above the road/below the slab

5.20m

Make up the foundations (4.5m wide and approximately 90cm thick)

3 strip footings

Thick slab which rests on four 65cm-thick walls

1m

Waterproofing

9,000m2 

Sewerage pipe

1,000m 

Asphalt mixes

870 t

Road structure

10,000m3