Breakthrough for HS2’s Longest Rail Tunnel Under UK’s Chiltern Hills
HS2's first Tunnel boring machine (TBM) named "Florence" has broken through the chalk geology of the Chilterns Hills in Buckinghamshire, UK, completing a 10-mile drive and excavating the longest Tunnel on the high-speed rail project. The breakthrough took place on February 27th, 2024, and marks a significant milestone...