CBR Values for Road Pavement Design

Name: Ruddlesden Geotechnical
Price range: $

California Bearing Ratio (CBR) values are provided for road pavement design, based on the results of in-situ and laboratory testing.

Ruddlesden geotechnical provides recommendations for road pavement design, at the preliminary design stage, for detailed design and for adoptable highways.

Ruddlesden geotechnical also provides advice and assessment on the suitability of existing road construction and make-up.

Case Study

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.