This contract includes the rehabilitation of the Criblette and Chauderon tunnels.

The work includes, among other things, the renovation of the tunnel waterproofing and the concrete lining (demolition and new construction of the tunnel vault), the reinforcement of the tunnel expansion with final nails and the new construction of the banquettes including sewer systems and cable batteries.

The most important volumes are (approximately): demolition of approx. 5,000 m3 of concrete from the tunnel vaults, approx. 4,000 m2 of tunnel vault area to be treated, approx. 33,500 m of drilling and anchoring material and approx. 700 tonnes of injection sludge.

This contract includes the rehabilitation of the Criblette and Chauderon tunnels.

The work includes, among other things, the renovation of the tunnel waterproofing and the concrete lining (demolition and new construction of the tunnel vault), the reinforcement of the tunnel expansion with final nails and the new construction of the banquettes including sewer systems and cable batteries.

The most important volumes are (approximately): demolition of approx. 5,000 m3 of concrete from the tunnel vaults, approx. 4,000 m2 of tunnel vault area to be treated, approx. 33,500 m of drilling and anchoring material and approx. 700 tonnes of injection sludge.