We deliver basements, retaining walls and underpinning works for complex urban and underground developments, drawing on deep engineering expertise and a delivery-led approach to manage risk, protect existing assets and achieve long-term performance. Our experience spans a wide range of ground conditions and site constraints, from dense city-centre locations to sensitive, asset-rich environments.
Our expertise includes the construction of retaining walls and substructures to support basements and underground works using gravity, anchored and sheet pile retaining systems. The selection of each system is driven by careful assessment of earth pressures, groundwater conditions, proximity of third-party assets and construction sequencing, ensuring that stability and serviceability are maintained throughout excavation and permanent works construction.
Basement construction is approached holistically, integrating excavation support, groundwater control, temporary works and permanent structure design. We place strong emphasis on temporary works strategy and sequencing, recognising that early decisions in these areas are critical to managing ground movement, settlement and interface risk. Continuous monitoring and verification are used to confirm performance against design assumptions as works progress.
Our underpinning capability is particularly effective where new basements or excavations are constructed adjacent to or beneath existing structures. Using staged and controlled underpinning techniques, we maintain the integrity and operation of surrounding buildings while enabling excavation to proceed safely below existing foundations. This approach is proven on highly sensitive sites where tolerance for movement is minimal.
