Our teams say thank you to the Krokodyl robot on public works construction sites
Designed by Bouygues Travaux Publics and introduced for the first time in a tunnelling machine on the HS2 project, the robot reduces the number of tasks performed by hand when removing wooden spacers separating the stacked concrete tunnel lining segments weighing 8.5 tonnes during the storage phases.
employees at the peak
year project duration
3,4 km viaduct
Two 15,75 km tunnels
Did you know?
The HS2 project’s two tunnelling machines, named Florence and Cecilia, will operate 24 hours a day. 170 metres long and weighing 2,000 tonnes, they are the biggest ever used on a British rail project.
Ground and foundation engineering works: VSL preparing the ground for building the tunnels and the viaduct
Before starting to bore the tunnel, Bouygues Construction subsidiary VSL conducted site investigation work and pile testing in a joint venture with Keller on behalf of Align. The teams then carried out ground reinforcement works on the tunnel’s south portal, which will be the entry point for the tunnelling machines, and the diaphragm wall for the first ventilation shaft. The KVJV joint venture will also be responsible for construction of the piled foundations for the viaducts, grouting works, retaining structures for four other ventilation shafts, and ground improvement works for the creation of the tunnel cross passages.