Deep Soil Mixing part of award winning road project

ongoing

A recent soil mixed road project ground engineering contractor Deep Soil Mixing Ltd carried out for contractor Kier Living and consulting engineers Patrick Parsons Ltd at Harrowby Road, Bilston in the West Midlands has won the Environmental and Sustainability Award at the Institute of Highways Engineers Mercia Branch Awards. The site was being redeveloped by Kier to provide residential properties. The landfilled made ground below a section of road was of such poor quality that CBR values were almost non-existent. The local Highways Authority and Severn Trent would not adopt the roads or sewers due to concerns over long settlement and required a significant guaranteed improvement of ground conditions before construction could begin. Initial proposals were for the poor-quality hazardous landfilled material to be excavated, sent to tip and replaced with imported granular fill. Patrick Parsons Ltd and Deep Soil Mixing Ltd provided a suitable ground improvement method using DSM’s double rotational mixing head to soil mix the ground as well as improving the waste classification of excess materials post-treatment. Installing secant soil mixed columns with a soil mixed slab over, Deep Soil Mixing Ltd used an RTG 19 rig with a double rotary mixing head. By mechanically mixing the existing soil with a cementitious binder, soil mixing changes the characteristics of weak soil to achieve a geotechnically modified material for numerous applications. This enables more efficient and effective installation and greater ground stability.