Call: 01392 678082

Established 2004

Ruddlesden geotechnical

Ruddlesden geotechnical provides ground investigation, geotechnical consultancy and contamination assessment services.

Based in Exeter, but covering the whole of the UK, albeit primarily concentrated in the South West, Ruddlesden geotechnical was formed in 2004.

Ruddlesden geotechnical works on behalf of a wide client base, including local, regional and national housing developers, housing associations, commercial developers, building contractors, structural and civil engineers, architects, building consultants, quantity surveyors, local authorities and private individuals.

Development projects range from single dwellings and extensions to large housing estates, multi-storey flats, offices, industrial units, roads, slopes, schools, hospitals and basements.

The services and projects listed on this web-site provide an indication of those undertaken by Ruddlesden geotechnical, but others are carried out. If your requirement is not readily identifiable on this web-site, please contact us as we may still be able to help you.

  • AGS
  • Constructionline
  • CSCS
  • SMAS
  • ECFC trust

Latest news

Recent projects

  • Latest news

    20 Aug 2026

    Start over-winter monitoring before it is too late!

    Look at these groundwater monitoring dataloggers! Whilst some loggers are still in the ground, monitoring groundwater levels all year round, these lot were taken out of their boreholes in May or June this year, once they had proven that they had recorded the seasonal groundwater peaks.As we come towards the end of a particularly dry summer, it might seem difficult to think about monitoring groundwater levels when conditions are at their wettest. But there is considerable benefit in starting over-winter groundwater monitoring sooner rather than later.. One year, the seasonal groundwater peak will be in November, and if the loggers don’t go in the ground before then, they won’t be able to record this!With Ruddlesden geotechnical, there is no financial benefit in delaying the start of over-winter groundwater monitoring; we charge the same to start monitoring in September as we do in December

    Start over-winter monitoring before it is too late!
    Start over-winter monitoring before it is too late!

  • Recent projects

    Deep Bore Soakaway Testing, Devon

    A combination of in-situ constant and variable (falling) and constant head testing was undertaken to provide information for the design of a number of deep-bore soakaway drains at a residential development site in Torbay. Deep-bore soakaway drains had previously been recommended by Ruddlesden geotechnical following observations made during conventional soakaway testing in accordance with BRE DG 365. Previous geotechnical investigation and near-surface geophysics, undertaken as part of a solution feature investigation, had indicated that the use of conventional shallow soakaway drainscould lead to the wash-out of near surface soils through underlying cavernous limestone, potentially leading to an increased long-term subsidence risk of the ground. Rotary open-hole boreholes were undertaken to form the deep bore soakaway at depths specified by the consulting engineers, based on information provided by Ruddlesden geotechnical from an earlier phase of geotechnical investigation, which included a period of groundwater monitoring. Additional in-situ constant head permeability testing was also undertaken following the installation of the deep bore soakaways to verify the design parameters and to confirm the performance of the deep bore soakaways. All testing was undertaken in accordance with BS EN ISO 22282-2:2012.

    14-yannons-deep-bore-soakaway-testing-reduced-1

  • Recent projects

    Earthworks Materials Suitability Assessment Enables Re-Use of Site-Won Soils, Devon

    A materials suitability assessment was undertaken as part of a wider geotechnical investigation and contaminated land assessment for a proposed residential development site in Torbay. Due to the site’s topography, significant amounts of cutting and filling were to be required to make the site suitable for development. Trial pitting was undertaken to ascertain the thickness, composition and type of materials present in the areas of proposed cut. Representative samples were taken for laboratory classification testing. On receipt of the laboratory test results, the materials were classified in accordance with Specification for Highway Works: Series 600: Earthworks, to determine whether the materials were suitable for their proposed end use. Ruddlesden’s report helped the developer assess the relative cost and viability of using site-won material, in lieu of importing large quantities of engineered fill and exporting excavated material to landfill unnecessarily.

    44-earthworks-materials-suitability-assessment-1