Geotechnical Engineering .

How We Can Help

  • Site Classifications
  • Land Capacity Assessments
  • Laboratory Soil Testing & Analysis
  • Compaction Testing
  • Clay Base Certifications
  • Earthworks Monitoring
  • Fill Assessments
  • Piling Details
  • Ground Treatment Solutions
  • Internal Thickening Layout Inspections
  • Ground Slab Assessments
  • Bushfire Attack Level (BAL) Assessments
  • Wind Classifications

Geelong Geotechnical Engineering

We provide geotechnical engineering for residential, commercial, and infrastructure projects in Geelong, the Surfcoast [Torquay, Barwon Heads, Ocean Grove, Lorne, Apollo Bay, Anglesea], the Bellarine [Drysdale, Portarlington & Queenscliff] and regional Victoria [Ballarat, Bendigo, Colac & Warrnambool] since 1991.

With a wealth of knowledge and a breadth of experience from over 13,000 projects and 150 years of combined construction experience, we will deliver excellent outcomes with a long-term partnership focus.


Soil Testing

We take soil samples from every site we work on and encourage the use of three to five-point sampling in order to achieve the most cost-effective and sustainable outcomes. Our team has over 30 years of experience in the residential construction industry, bringing a wealth of real-world knowledge and expertise to soil testing.


Soil testing reduces costs and prevents over-engineering

Our unique approach to delivering low-cost engineering outcomes involves putting in the extra work upfront, to ensure that any unnecessary over-engineering is avoided. We use soil testing on every site, and encourage our clients to do a more thorough minimum of three-point sampling in order to provide a highly accurate understanding of each individual site.


Identifying soil conditions on-site for better design

Site testing allows us to have the clearest possible picture of the soil condition, which enables us to create a precise design that is adapted to the ground on which the structure needs to sit.

Sphinx values original thinking and tailored design over cookie-cutter solutions, which can be more costly and unsustainable in the long term.


Using real-world data for more accurate results

Designed in-house at Sphinx Consulting, our LIS database consists of representative soil data sets from the last 30 years. The database has an emphasis on regional Victoria, with data taken from tens of thousands of test site locations.

We have restricted the LIS to the most current 12,000 site addresses tested and soil profiles from about 40,000 test borehole locations. This allows us to optimise the clarity of the information, and to ensure that the LIS data is constantly evolving and remaining relevant to current areas of development.

As new data is included, some of the older data is retired to alternative data sets.


Why do you need a geotechnical engineer?

The ground/structure interface is the most important variable when it comes to designing houses that are best suited to the site conditions over the long term. Our field geo-technicians will inspect each individual site, developing comprehensive field notes outlining all of the relevant data about the site and soil conditions.


Site test reporting to establish ground conditions

Having conducted a site visit, our geotechnical engineers will use the information obtained from on-site soil testing and compare it to our “Location Information System” so as to compile a report for each individual site in the context of optimum local knowledge of the general and nearby areas.


Geotechnical Report contents

Our geotechnical reporting includes a building and site description, as well as the results of soil testing (five-point soil sampling will return the most accurate results, however, three-point soil sampling is generally adequate for the smaller allotments).

The report also contains information about surface movement and other important factors that may impact the construction of a footing on a particular site. Once the site conditions have been established, our reporting makes recommendations for a variety of footing or slab types.

Our geotechnical reports then conclude with general recommendations made by our engineers during the course of the site assessment. Long-term maintenance requirements of the site and future landscaping recommendations are made so as to provide the homeowner with an explanation of their ongoing responsibilities in the future.

Inspections for the footing construction

During construction, we are on standby to inspect the construction. This allows your project to maintain its progress during construction and not be delayed. With the ever-changing weather conditions, the construction of the footing is sometimes very difficult and for the builder to have the active support of the geotechnical engineer during this time can be the difference between a project getting bogged down with delays and cost overruns and a project meeting its deadlines whilst still providing an optimum outcome.

We are able to do the mandatory inspections associated with a building permit.

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