Tunnelled solutions provide a discreet option for transport and utility pathways that can reduce disruption, minimise visual impact and increase service life and whole-life value.
But each tunnel – from the smallest and simplest to the largest and most complex – has its individual challenges.
Whatever your tunnel project, it can benefit from our design expertise and practical understanding. We will ensure safety, efficiency and sustainability from the initial design through to project completion.
Our tunnelling heritage goes back more than 130 years. We use that experience to select exactly the right design and construction technologies for your project.
Use any method, in all conditions
Bored, drill and blast, cut and cover, immersed tubes, trenchless (micro-tunnelling, pipejacking and directional drilling), sprayed concrete lining, sequential excavation. You name the tunnelling method, we’ve used it. From hard rock and soft soil to seismically active regions, deep tunnels under high groundwater pressure or sub-sea tunnels under busy sea lanes, we’ve navigated our way through all types of ground conditions.
Apply innovative techniques
We’ve developed innovations and embraced new technologies to deliver subterranean structures, including the first use of precast concrete and bolted tunnel linings, which improved the speed, safety and cost of installation. We invented the bentonite slurry tunnel boring machine to enable soft ground tunnelling and have developed the observation method to improve the speed and safety of shaft and tunnel excavation. We’ve also made advances in sequential excavation and sprayed concrete linings, which are now the go-to solution for hydropower caverns, stations, crossover caverns and connecting passages.
Help cut carbon
We apply carbon management on all our projects, to help you pursue your decarbonisation goals. We’ve reduced the carbon footprint of tunnels worldwide and continue to innovate with materials and methods to deliver sustainable solutions.
Our tunnelling teams work with owners, operators, contractors and investors to design and deliver transport, power and water tunnel projects around the world. We can take care of every stage of your tunnel project, from initial planning and feasibility studies through concept and detailed design, costing and specification, procurement, project management, construction management and supervision, to repair and maintenance.
We are working with owners and contractors to plan, design and deliver subterranean structures across the globe:
Daarwin is an AI-powered solution for monitoring and predicting the behaviour of deep excavations, tunnels and earthworks. Its real-time analysis enables engineers to refine their designs as work advances, maintaining safety while unlocking opportunities for working faster and more resource-efficiently. Daarwin reduces risk and increases sustainability.