Ground Improvement, Shropshire
To inform the design of an embankment for a proposed highway, as part of the residential redevelopment of a site in Shropshire, Ruddlesden geotechnical were instructed to undertake a geotechnical investigation and assessment.
The geotechnical investigation comprised cable percussive boreholes, which encountered a succession of Alluvial soils, including peat, silt and clay to depths in excess of 10m depth.
Analyses indicated that the surcharge of the embankment would consolidate the underlying soils by virtue of their low strength, which would likely affect the serviceability of the proposed highway. It was also considered that there would be an insufficient factor of safety on the global stability of the embankment.
Ruddlesden geotechnical proposed that ground improvement be undertaken, for example by pre-surcharging the ground and installing drainage, to speed-up the consolidation of the underlying Alluvial soils, to reduce the amount of anticipated settlement in the long term to acceptable levels.