Tunnelling and Underground Works
Auger Boring
Delivering cost-effective, trenchless crossings with minimal disruption, our auger boring and guided auger boring solutions provide a reliable alternative to complex tunnelling. From straightforward installations to high-accuracy, environmentally sensitive projects, we combine proven methods, advanced guidance systems and engineering expertise to ensure safe, efficient delivery.
SCL and cast-in-situ lining
We are a leading Sprayed Concrete Lining (SCL) specialist, delivering safe, high-quality tunnel linings in the most demanding conditions. From early design through to completion, we provide expert input on buildability, sequencing and quality.
Our capabilities span primary and secondary linings, complex geometries and both temporary and permanent works, all delivered using advanced technology and highly skilled teams.
We also provide tailored waterproofing solutions, including membrane and spray-applied systems, ensuring long-term durability.
For permanent works, we deliver both spray-applied and cast in-situ secondary linings, combining structural performance, precision and finish quality.
TBM/Segmental Lining Tunnelling
We deliver advanced segmental tunnelling solutions using Tunnel Boring Machines (TBMs), supporting projects from 3m to over 10m diameter across utilities, energy and major infrastructure.
Our expertise spans the full lifecycle, from early design and segment specification through to installation and quality assurance, ensuring efficient, watertight and high-performing tunnels.
We have a proven track record on complex, large-scale schemes in constrained environments, combining precision engineering with strong interface and risk management.
Using specialist plant, experienced teams and engineering-led delivery, we provide safe, efficient and reliable TBM tunnelling solutions, even in the most challenging conditions.
Microtunnelling and Pipe Jacking
Advanced Pipejacking Solutions, Delivered with Precision
We deliver tailored pipejacking solutions across microtunnelling, mechanical and hand-shield methods for diameters from 600mm to over 3m and drives beyond 2km, using advanced laser-guided systems for precise, low-disruption installations in complex environments. With flexible techniques for challenging ground conditions and an engineering-led approach, we ensure safe, efficient pipeline delivery that protects infrastructure and keeps projects on programme.
Horizontal Directional Drilling (HDD)
We deliver precise, low‑impact Horizontal Directional Drilling (HDD) for pipelines and cables across utilities, energy and infrastructure. With rigs from 12–500 tonnes, we install up to 1m OD over lengths to 1,000m - even in complex ground conditions. Our expertise spans advanced alignment control, tailored drilling fluids, and safe operations in congested environments - protecting existing assets and minimising disruption. From planning to pipe installation, we ensure accurate, high‑quality results you can rely on.
Direct Pipe
We deliver industry-leading Direct Pipe solutions that combine the precision of microtunnelling with simultaneous installation of the final product pipe. This highly efficient, single-step method covers diameters from 600mm to over 2.4m, supporting trenchless crossings and long-distance sea outfalls in complex ground and marine environments.
By using the product pipe as the primary support, Direct Pipe removes the need for secondary installations, reducing programme time, construction risk and surface disruption while improving alignment accuracy and structural integrity.
Hand and Mechanical Excavation
Delivering precise, low-impact underground works where mechanised methods aren’t suitable. Our expert operatives use traditional hand-mined techniques to carry out controlled excavation in confined, sensitive or live environments, ensuring safe connections to existing infrastructure with minimal disruption.
From tunnels and break-ins to shaft construction, we combine proven craftsmanship with modern engineering oversight to manage risk, maintain asset integrity and deliver reliable results in the most challenging conditions.
