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

    13 Jul 2026

    Geoff’s birthday treats!

    We recently celebrated a special birthday of Geoff Davis, in a place that is close to his heart: the East Devon coast.He treated us to his knowledge of the geology and landslide systems in the area, and we treated him to an ice cream on the beach!

    Geoff’s birthday treats!
    Geoff’s birthday treats!

  • Recent projects

    Groundwater Monitoring for Retaining Wall Design, Devon

    Following a geotechnical investigation, groundwater monitoring was undertaken to provide data for the design of a proposed retaining wall. Due to the site’s locality, near to a tidal estuary, monitoring visits were carefully considered, to ensure that the high tidal range, and the groundwater table’s response, was reflected in the data. The level of the groundwater table and groundwater pressures were critical to the retaining wall design. Limited data and/ or conservative assumptions could have resulted in the overdesign of the structure, with construction costs significantly more than they should have been.

    20-kingsbridge-1

  • Recent projects

    CBR Values for Road Pavement Design, Cornwall

    Ruddlesden geotechnical were commissioned to undertake California Bearing Ratio (CBR) testing to provide a design CBR value for road pavement design. The testing was to be undertaken within a highway verge of an A-road. Ruddlesden geotechnical obtained the necessary street works licence and organised the appropriate level of traffic management to protect site operatives. Trial pits were excavated within the verge to reveal the underlying subgrade. A number of Transport Research Laboratory (TRL) Dynamic Cone Penetrometer (DCP) tests were undertaken to ascertain the strength of the subgrade and, supplemented with UKAS accredited laboratory testing, used to calculate a representative CBR value for design. Bearing pressures were also provided for used in foundation design of highway signage.

    41-helston-cbr-values-reduced-1