HS2 Launches Final Duddeston Junction Viaduct in Birmingham

Major Milestone for HS2

HS2 engineers have initiated the launch of the final Duddeston Junction Viaduct, a pivotal part of the Curzon Approaches leading to Birmingham Curzon Street station. This viaduct, measuring 700 metres in length, stands as the longest among five interconnected viaducts in the project. The first section, spanning 170 metres, has already been successfully launched over two active freight lines.

Project Overview

The Duddeston Junction Viaduct is designed to traverse six railway tracks, which include three freight and three passenger lines. The construction is notable for its complexity, as it must operate over live railway lines while ensuring safety and minimal disruption to services. The project is anticipated to be completed by mid-2027, with the next phase set to begin in December, focusing on the passenger lines.

Key Features of the Viaduct

• Length: 700 metres, making it the longest of the five Curzon Approaches viaducts.
• Structure: Comprises 14 spans, each approximately 55 metres long, with a total weight of around 6,835 tonnes.
• Gradient: Features a three percent gradient and rises to 12 metres above existing tracks.
• Construction Team: Up to 90 engineers and operatives are currently working on-site to ensure the project's progress.

Construction Challenges

The construction site is constrained by the presence of six live railway tracks and industrial facilities, making the operation particularly challenging. Preparatory works began in 2023, which included relocating utilities and addressing ground contamination issues. Additionally, two of the three freight lines were diverted onto a new bridge and embankment to create a secure working environment.

Future Phases

As the project advances, the next phase will involve launching the remaining sections of the viaduct over the passenger lines, scheduled to commence in December. The overall construction of the Duddeston Junction Viaduct is a critical component of the HS2 project, which aims to enhance connectivity and reduce travel times across the UK.

Conclusion

The launch of the Duddeston Junction Viaduct marks a significant step in the HS2 project, showcasing the engineering capabilities involved in constructing one of the UK's most complex railway structures. With the completion of this viaduct, HS2 continues to progress towards its goal of revolutionising rail travel in Britain.