We offer site investigation contracting with factual reporting, cross consultancy services.

Geotechnical  Consultancy

Geotechnical Consultancy

Geotechnical risk is one of the main considerations developers and engineers need to manage in order to deliver a successful project.

In-situ Testing  Earthworks

In-situ Testing Earthworks

Working closely with the laboratory and the consultancy teams, we specialise in working with contractors delivering the placement of engineered fill.

Laboratory  Testing

Laboratory Testing

Our modern testing facilities paired with qualified and experienced staff enables our clients to choose independent testing services, or testing as part of the overall site investigation package.

Contaminated Land

Contaminated Land

Our investigations range from Phase 1 reports, developing the conceptual site model to detailed quantitative risk assessments.



South West Geotechnical Ltd works within a wide variety of sectors.Clicking here will take you to case studies, by sector type, that demonstrate our capabilities and innovative approach.



River Dee Estuary, UK

Shotwick Solar Park


  • UK’s largest ground mount utility scale solar park

  • Ground Investigation

  • Geotechnical Assessment

  • Pile testing

  • Resistivity Testing

  • Pile length optimisation

  • Construction phase verification / workmanship testing




South West Geotechnical was commissioned to complete a ground investigation and geotechnical assessment for a large 74MW ground mount solar park. This site lies on reclaimed land formed from sediment dredged from the River Dee Estuary. A combination of investigative methods, including window sampling, cone penetration testing, pile testing and resistivity testing in conjunction with detailed UKAS accredited laboratory testing in SWG’s in house laboratory helped develop the comprehensive ground model and initial design of foundations.


A two-post system was recommended, with relatively high edge table pull-out forces on the north-side piles.


Initial pile testing recorded marginal shaft resistance, but rather than increase the pile depth or adopt some other form of anchorage, it was decided to check what strength increase with time might be developed.


Three separate test visits gave the following resistance / time relationship for northern edge piles.




 A full 100% increase in strength was seen to be gained in these soils, after being installed for 100 days, which was more than sufficient to permit the original design to be safely adopted, with significant savings for the client.

Area 4 South VSC



South West Geotechnical
South West Geotechnical
South West Geotechnical