Mainmark helped protect the historic Telford Bridge in Stirling by strengthening weak soils beneath the bridge foundations using Teretek® resin injection, reducing future settlement risk and delivering measurable ground improvement in just four days with minimal disruption..

The Challenge

The historic Telford Bridge in Stirling had experienced settlement associated with loose soils beneath the approaches to the western parapet wall. Following further assessment, the project scope was expanded to include the eastern parapet wall to help protect the long-term performance of the structure. Stirling Council required a solution that would improve ground conditions and reduce future settlement risk without extensive excavation, reconstruction or prolonged disruption to bridge operations.

As a key piece of local transport infrastructure, maintaining access while preserving the historic asset was a critical project requirement.

The Solution

Mainmark deployed its proprietary Teretek® resin injection technology to improve the strength and density of the soils beneath the bridge foundations. The treatment was undertaken across a 150m² area, extending to depths of up to 2.5 metres below foundation level, all within a single four-day mobilisation.

Through a carefully designed injection grid, expanding structural resin was introduced into the weak soils, compacting and strengthening the ground beneath the affected parapet wall foundations.

Unlike traditional reconstruction methods, the process required no major excavation and maintained a small operational footprint throughout the works.

The Results

Mainmark successfully completed the project within just four days, delivering measurable ground improvement beneath both parapet wall approaches. The treatment strengthened weak soils, reduced future settlement risk and enhanced support beneath the foundations without the need for disruptive reconstruction works.

Key outcomes included:

• Ground improvement beneath both western and eastern parapet wall approaches.

• Controlled 2mm foundation lift demonstrating effective re-support of the structure.

• Elimination of extensive excavation and reconstruction activities.

• Reduced disruption to road users and bridge operations.

• Extended service life of an important historic infrastructure asset.

Expert Insight

"The successful completion of this project within just four days highlights the effectiveness of our Teretek® solution. By strengthening weak ground beneath both parapet walls, we delivered a fast, non-invasive solution that reduced future settlement risk and safeguarded the long-term performance of this historic bridge."

David Hedley, Infrastructure Lead

Supporting Sustainable Infrastructure

Rather than replacing structural elements, Mainmark improved the existing ground conditions beneath the bridge foundations, reducing material consumption, shortening programme duration and preserving the bridge for future generations. This approach demonstrates how proactive ground improvement can help infrastructure owners address subsurface issues before they develop into larger structural challenges.

Speak to Mainmark?

Whether you're managing highways infrastructure, bridges, embankments or critical transport assets, Mainmark's engineered ground improvement solutions can help extend asset life, reduce disruption and avoid costly reconstruction. Call: 0800 975 0507