NZS 3404 and NZGS guidelines set a high bar for structural and geotechnical design in New Zealand, and Blenheim’s alluvial geology makes a rigorous soil mechanics study non-negotiable. The Wairau River has deposited layers of silts, sands, and gravels across the plain, creating a stratigraphy that shifts dramatically over short distances. Foundation performance, pavement life, and slope stability all depend on parameters that only a controlled laboratory program can confirm. We run triaxial compression, direct shear, and consolidation tests on undisturbed samples extracted from boreholes across the region. For roading projects, CBR road testing supplies the strength input that Marlborough Roads design manuals require, while triaxial testing gives us the effective stress parameters needed for retaining wall checks under NZS 4203 loading combinations.
Reliable soil mechanics parameters in Blenheim turn heterogeneous alluvial ground into a predictable engineering material — no guesswork, just defensible numbers.
