United Kingdom
Types of services
HS2 Phase 1 is a new high-speed line covering 225 km from London to Birmingham, UK. The HS2 Phase 1 Lot C1 Contract was awarded to ALIGN JV. This section consists of 21.6 km of high-speed rail line and
includes a viaduct, a twin-bore tunnel, earthworks, two road bridges, a footbridge and a wildlife crossing structure.
The Colne Valley viaduct is an iconic structure, 3.4 km long with approach embankments, stretching from the Northolt tunnel at the southern edge of the Colne Valley Regional Park up to the Chilterns at the northern end. It is set in a diverse and ever-changing landscape, made up of intertwined with forests and crosses major obstacles such as roads and a canal.
The Chilterns tunnel comprises two 16 km-long bored tubes beneath an area of outstanding natural beauty. There are five intervention shafts along the route, four of which are also ventilation shafts. Rendel and Ingerop contributed to the studies in the tender, project and execution phases and assisted the ALIGN JV design-build consortium made up lakes of intertwined during the construction work.
