Geotechnical Engineering & Ground Investigation Services
Technical insight and engineering assurance for safe, efficient and compliant development
A robust understanding of ground conditions is fundamental to the success of any development. From foundation design to earthworks, retaining structures and temporary works, geotechnical engineering provides the parameters that underpin safe and cost‑effective construction.
Arthian delivers high‑quality geotechnical investigations and engineering assessments aligned with BS 5930, Eurocode 7 (EC7) and industry best practice. Our work provides developers, contractors and design teams with the clarity they need to progress with confidence.
Why Geotechnical Investigation Matters
Ground conditions are one of the most significant sources of risk in construction. Insufficient or poor‑quality data can lead to:
- Over‑engineered foundations
- Unexpected ground conditions
- Programme delays
- Increased contractor risk premiums
- Cost escalation
A well‑designed geotechnical investigation provides the information required to optimise design and reduce uncertainty.
Ground Investigation Services
Ground Investigation Design
We design investigations that are proportionate, risk‑led and aligned with your development objectives. This includes defining sampling strategies, selecting appropriate investigation methods and ensuring compliance with BS 5930.
Boreholes, Trial Pits & Sampling
We deliver a full range of intrusive investigation techniques, including:
- Cable percussive and rotary boreholes
- Machine‑excavated trial pits
- Window sampling
- Soil and rock sampling
- Groundwater and gas monitoring installations
All logging is undertaken by experienced engineering geologists.
In‑Situ Testing
We undertake a range of in‑situ tests to support design, including:
- Standard Penetration Tests (SPT)
- California Bearing Ratio (CBR)
- Plate load tests
- Permeability testing
These tests provide essential parameters for foundation, pavement and earthworks design.
Laboratory Geotechnical Testing
We provide a full suite of laboratory tests, including:
- Classification tests
- Shear strength testing
- Consolidation testing
- Compaction and moisture‑density relationships
Results are interpreted by our geotechnical engineers to support design development.
Geotechnical Engineering & Design Support
Foundation Assessment
We assess the suitability of shallow foundations, rafts and piles, providing clear recommendations based on ground conditions, loading and settlement behaviour.
Earthworks Assessment
We evaluate the feasibility of reusing site‑won materials, compaction requirements and cut/fill balance, supporting efficient earthworks planning.
Slope Stability & Retaining Structures
We undertake slope stability analysis and provide geotechnical input for retaining walls, basements and excavations.
Ground Improvement Feasibility
Where ground conditions are challenging, we assess the suitability of ground improvement techniques such as vibro stone columns, dynamic compaction and grouting.
Construction Support & Specialist Assessments
Piling Platform Design & Verification
We design safe, compliant piling platforms and provide verification to support contractor mobilisation.
Temporary Works Geotechnical Support
We provide geotechnical input for excavation stability, working platforms and temporary retaining structures.
Coal Mining Risk Assessment (CMRA)
In coalfield areas, we undertake CMRAs to identify and mitigate mining‑related risks.
Geotechnical Reporting
We produce clear, concise and regulator‑aligned reports, including:
- Geotechnical Investigation Reports (GIR)
- Geotechnical Design Reports (GDR)
- Reports for Geotechnical Design (RfG)
- Factual and interpretive reports
How We Work
1. Technical Clarity from the Outset
We define investigation requirements based on design needs, site constraints and regulatory expectations.
2. High‑Quality Data Collection
Our investigations are delivered by experienced engineers and geologists, ensuring accuracy and consistency.
3. Engineering‑Led Interpretation
We provide clear, actionable recommendations that support structural design, procurement and construction.
4. Compliance & Assurance
All outputs follow BS 5930, EC7 and relevant CIRIA guidance.