Ground investigation in Hull demands a thorough understanding of the region's complex Quaternary geology, dominated by glacial till, alluvial deposits, and soft estuarine clays along the Humber Estuary. A robust investigation must assess the variable thickness of made ground in the city centre and the presence of laminated clays and silts that can influence foundation design and earthworks. Compliance with BS 5930 and Eurocode 7 is mandatory, ensuring that the scope of work adequately characterises ground conditions, identifies potential contamination from Hull’s industrial legacy, and addresses geotechnical risks such as low bearing capacity and compressible layers. Early integration of Standard Penetration Testing (SPT) data provides a fundamental index of soil density and consistency across the sequence.
Our methodology aligns strictly with UK standards, employing a phased approach from desk study to intrusive fieldwork and advanced laboratory testing. We routinely combine cable percussive boreholes with In-Situ techniques to derive high-quality geotechnical parameters. The execution of field permeability tests, specifically Lefranc and Lugeon methods, is critical in the Chalk and granular deposits beneath the drift cover to determine hydraulic conductivity for dewatering and basement design. All dynamic sampling and rotary coring are supervised by experienced geotechnical engineers, with logging performed in accordance with BS 5930:2015. The resulting data underpins the derivation of characteristic values needed for limit state design, ensuring that foundation solutions are both safe and economical for the specific ground profile encountered in Hull.
Typical projects in Hull range from residential developments on former docklands to the assessment of flood defence embankments and the infrastructure supporting the renewable energy sector along the estuary. An investigation for a piled foundation in the city’s alluvial plains relies heavily on a detailed soil mechanics study to evaluate settlement and negative skin friction. Similarly, the characterisation of reworked glacial materials for road construction requires precise soil classification to determine suitability and long-term performance. Each project is unique, driven by the specific loading conditions and the interaction between the proposed structure and the underlying, often challenging, post-glacial deposits.
The investigative process concludes with the delivery of a comprehensive Ground Investigation Report, which synthesises the site operations, laboratory test results, and geotechnical interpretation into a clear, actionable document. This report provides a factual account of the ground conditions, the derived geotechnical design parameters, and a detailed assessment of identified hazards. Our value proposition is the delivery of a reliable ground model that reduces uncertainty, enabling civil and structural engineers to proceed with confidence. By precisely defining the engineering properties of the soils and rock, we directly facilitate the optimisation of foundation design and earthworks, mitigating the risk of costly over-design or unforeseen ground-related delays during construction.