Tunnels & Sub-structures

Subterranean infrastructure operates under immense environmental and load-bearing stress, making proactive remediation critical to public safety and network resilience. We partner with civil engineering contractors, rail networks, and utility providers to deliver tier-one structural repairs for tunnels, culverts, underpasses, and deep sub-structures. Operating in complex, confined spaces, our specialist teams address severe concrete degradation, hydrostatic water ingress, and structural settlement. We deploy advanced ground engineering techniques, heavy-duty structural resin injection to seal active leaks, and targeted concrete remediation to restore vital load capacities. Supported by cutting-edge Non-Destructive Testing (NDT) and Ground Penetrating Radar (GPR), we ensure all subterranean interventions are highly engineered, permanent, and delivered with minimal disruption to the critical transport and utility networks operating above and below ground. Explore our tunnel remediation projects and sub-structure engineering insights below.

News & Insights

Maintaining Subterranean Concrete Structures: Hidden Hazards, Complex Challenges and Lessons from Battersea Power Station

Subterranean concrete structures underpin the modern urban and industrial landscape. From deep station boxes to basements, tunnels and transfer slabs, these unseen elements work under immense pressure and must endure for decades with little direct contact or visibility. Yet maintaining subterranean concrete can be one of the most complex tasks faced by asset managers and […]

Targeted Water Ingress Remediation for a Multi-National Retailer

The Challenge Following our successful delivery of critical structural remediation for this client’s flagship London site, Structural Repairs was engaged to investigate and resolve widespread, active water ingress at their Cosenza location. A preliminary condition survey revealed that the infiltration within the retail unit was highly complex and interconnected. Active leaks were identified across the […]

Scanning Tunnels with Ultrasound and GPR Technology

Scanning Tunnels Structural Repairs Assists Rail Operators in Scanning Tunnels with Ultrasound and GPR Technology Structural Repairs, a renowned UK-based company specialising in advanced non-destructive testing (NDT) techniques, has been helping rail operators effectively scan their tunnels using Ultrasound Thickness Testing (UTT) and Ground Penetrating Radar (GPR). By leveraging these state-of-the-art technologies, Structural Repairs empowers […]

Main Contractor – Hemel Hempstead

Main Contractor Hemel Hempstead Challenging due to its extremely tight access, this project held us as the main contractor while we carried out a successful basement fit and conducted any further renovations and repairs necessary. Having worked on this project from start to finish, this Hemel Hempstead care home can now enjoy a beautiful new […]

Basement Waterproofing – Fulham

Basement Waterproofing Fulham Our client could hear water running behind their basement walls and the pump chamber activating every 10 minutes. This was a stressful scenario for them as they had concerns the water could potentially flood the property. We were called in to identify the problem and provide the required waterproofing solutions. Project Details: […]

Basement Wall Failure – Gillingham

Basement Wall Failure Gillingham A beautiful house located in Gilling, Kent, which was in dire need of repair as a means to eliminate the threat which it was causing to those around it. This property was facing serious structural instability on its basement walls and needed to be repaired as soon as possible. Project Details: […]

Substructure and Undercroft Waterproofing

Sub-structure waterproofing services that deploy advanced membrane systems and resin injection to block hydrostatic pressure, ensuring dry and secure subterranean environments in deep commercial basements.