| Region | Buckinghamshire & Hertfordshire |
| Project | Concrete Milling Inside a HS2 Tunnel |
| Client | Align JV |
As part of ongoing enabling works for HS2, Align JV identified high spots in concrete laid inside the tunnel infrastructure, with deviations ranging from 10mm to 50mm above the required level. This needed to be rectified.
Jet was initially called to the North Portal in Great Missenden to mill these imperfections. Following a successful first operation, Jet was invited to continue works at the South Portal in Maple Cross. This demonstrating confidence in our capability and delivery.
Jet deployed a tracked 1m planer and a 350mm planer, both fitted with fine milling drums, to achieve the precision required for the concrete correction.
Due to the confined nature of the tunnel, traditional transport methods were not viable. The planers used on the project had to track in under their own power, with the furthest point being approximately 16km inside the tunnel.
To meet strict safety standards, Jet’s machines were fitted with fire suppression systems, installed on-site over two days to mitigate risks of sparks or flames in the enclosed environment. Jet worked closely with Health and Safety and onsite advisors to meet exacting requirements.
Jet successfully milled the high spots across both portals, enabling Align JV to proceed with further tunnel works.
The project showcased Jet’s ability to adapt to complex and constrained environments, delivering high-precision milling under challenging physical and logistical conditions.
The equipment deployed included a Tracked 1m planer with fine milling drum and a 350mm planer with fine milling drum, with custom fire suppression systems installed on both machines
Jet’s flexibility, technical expertise, and commitment to safety were key to the success of this unique infrastructure project.
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TBC – Spokesperson Statement
