Surrey sits on complex Quaternary deposits — thick layers of compressible clay and silt that challenge any foundation design. NBCC 2015 and CSA A23.3 set clear requirements for ground improvement on these soils. We design stone columns that transfer load to competent strata and reduce settlement to acceptable limits. Each design accounts for Surrey’s high seismic hazard rating and the variable water table found across the municipality. Our team runs the design from initial borehole data through to field verification. We combine the stone column layout with a CPT test program to confirm tip resistance and friction ratios before installation begins.
Column spacing drives settlement reduction. Get the replacement ratio right and the clay takes almost no load.
