Geotechnical design and analysis

Geotechnical design and analysis is the science of understanding the behaviour of earth materials such as soil, rock, and groundwater, then using that knowledge to engineer safe and stable solutions for ground conditions that are aligned with client requirements.

Considerations include:

Soil and rock characterisation
Identifying the type, strength, and stability of subsurface materials

Groundwater assessments
Evaluating water table levels and flow patterns that could affect construction

Foundation design
Creating tailored solutions for footings, piles, retaining walls, and other structural supports

Slope stability and earthworks design
Ensuring hillsides, embankments, and excavations will not collapse or erode

Load-bearing analyses
Predicting how the ground will respond to the weight and pressure of buildings or infrastructure

Geotechnical analysis is essential to understand what is underneath the infrastructure being constructed and is important for several reasons:

Risk mitigation – unseen subsurface conditions (like buried debris, soft clay, or high groundwater) can derail timelines and inflate costs. Without proper analysis, structures may crack, tilt, or even collapse due to shifting ground.
Structural integrity – the type of soil directly influences the kind of foundation needed. Sand, clay, and rock behave very differently under pressure. Accurate data ensures that engineers design foundations that match the site’s unique conditions.
Cost efficiency – the early detection of geotechnical challenges prevents expensive redesigns or emergency fixes later in the project. It helps to optimise material use and construction methods, saving money and resources.
Environmental responsibility – understanding groundwater and soil contamination helps projects comply with environmental regulations and also prevent long-term damage to ecosystems surrounding the site.

The geological environments in which our teams work in demand the application of various ground improvement techniques to stabilise, strengthen or stiffen the landform to facilitate earthworks programs, building or infrastructure developments.

Considerations include:

Soil and rock slope analysis
Foundation design, including pile foundations and shallow foundations
Dynamic compaction
Deep soil mixing
Geo data management
Ground retention, including basement support systems, bridge abutments, ground anchors, landslide remediation, retaining walls, and soil nails
Ground settlement
Ground improvement, including jet grouting, stone columns, rigid inclusions, surcharging, wick drains, and vibro compaction