The specialist American drill rig manufacturer E-Z Drill, together with its sole European concessionaire Castellan Group, designed, built and delivered to site in just two weeks a special tailor-made drill for use on a major M25 motorway widening project. It was brought in specifically to drill holes Into the two sides of the existing Berry Lane viaduct, just south of junction 18 at Rlckmansworth, Hertfordshire, to accept tie bars to link into new reinforced-concrete pier heads and an extended cast-in-situ reinforced-concrete bridge deck…

Read the article from Concrete Magazine – Widening the M25