Geotechnical Engineering Services

Ground Investigation & Site Assessment: We investigate soil and rock conditions using test pits, Cone Penetrometer Tests (CPTs), borehole drilling and dynamic cone penetrometer (DCP) testing. Where relevant, we also undertake geomorphic mapping to understand landform processes, slope behaviour, and the history of natural hazards across a site.

A well‑planned and well‑executed investigation early in a project reduces uncertainty, risk, and cost as the project progresses. 

Retaining Wall Design: We design all types of retaining walls, from small residential walls through to large, complex structures subject to challenging ground conditions, steep slopes, and significant loadings.

Our experience includes gravity walls, cantilevered timber and steel pole walls, reinforced concrete walls, anchored walls, and reinforced soil systems. Designs are tailored to site‑specific ground conditions and consider seismic loading, drainage performance, constructability, and long‑term durability, in accordance with relevant New Zealand standards.

We focus on buildable solutions that manage risk, integrate with adjacent structures and slopes, and perform as intended over the life of the asset.

Slope Stability Analysis: We assess existing and proposed earthworks slopes using industry-standard stability modelling techniques. We also design landslide and rockfall remediation and erosion protection. 

Geohazard Assessments: We map landslide and rockfall hazards, carry out engineering geological assessments, and evaluate the risk to life, property and infrastructure.