Understand
HS2 'cut-and-cover' tunnel structure at Wendover completed
Overview
The central structure of a mile-long 'green tunnel' for HS2 near Wendover, Buckinghamshire, has been completed after 18 months of work. Built using the 'cut-and-cover' method with 2,740 precast concrete segments, the northbound and southbound sections were joined when the final segment was installed.
Key points
- The mile-long (1.4km) tunnel structure near Wendover is one of five green tunnels on the HS2 route between London and Birmingham.
- The tunnel was built using the 'cut-and-cover' method, assembling 2,740 precast concrete segments after digging up earth alongside the A413.
- Work on the structure began in spring 2025 and is carried out by HS2's main works contractor, EKFB.
- Contractors will now complete the entrances, floor, and internal fittings before covering the structure with earth and landscaping it.