Services We Provide

Geotechnical Investigation Report

Geotechnical Engineers in our Auckland and Christchurch branches will visually assess site geohazards. In addition, geotechnical engineers carry out shallow and deep geotechnical investigations to assess ground conditions for TC1, TC2, or TC3 sites or where the risk of liquefaction is high in Christchurch.

Detailed Geotechnical Investigation Report

A detailed geotechnical investigation is required for MBEI TC3 sites, sites prone to potential liquefaction hazards, and commercial projects. The investigation and reporting are needed by local authorities and structural engineers to confirm requirements for complex TC3 sites and commercial sites. Depending on the size and complexity of each project, the geotechnical investigation will typically consist of:

  • Shallow ground testing to 3.0m depth including Hand Augers, shear vane tests, and Scala Penetrometer tests.
  • Deep ground testing, which will include cone penetrometer tests (CPT) to a minimum of 15m below ground level where ground conditions allow, or Machine Borehole Tests, where CPT tests cannot be undertaken.

The price for a detailed geotechnical investigation and reporting is highly variable due to the size of the project and the number of tests required. There might be unforeseen conditions, that may require further testing excavation, laboratory testing of soils, and external peer review.

Depending on our current workloads and our subcontractor availability, the shallow and deep testing will commence within two to three weeks of confirmation from you and the report issued two to three weeks after. For super urgent jobs, the turnaround time can be reduced to four weeks in total.


Why Choose Our Service

We specialize in Geotechnical & Structural Engineering Services and provide quality and on-time services.

  • Satisfaction Value
  • Quick turnaround
  • Competetive and Quality Report

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What is a Geotech Report?

All the above technical words are normal for
geotechnical engineers and they are quite familiar with them, but how about the people
without geotechnical knowledge. Let’s start and explain in a simple word what is
Geotech or soil reports?

This is a useful topic for all developers, first
home buyers, landowners, or anyone who is interested to know more about Geotech

First of all, we need to understand the following
basic soil types.

Very Coarse

  • Boulders:
    particle sizes are usually above 200mm
    and it comes in angular, subangular, and round shapes.
  • Cobbles:
    particle sizes are between 60-200mm and it comes in angular, subangular and
    round shapes.

Coarse Soils

  • Coarse
    Gravels: sizes are between 20-60mm and it also comes in angular, subangular and
    round shapes.
  • Medium
    Gravels: particle sizes are between 6-20mm and the shapes are similar to coarse
  • Fine
    Gravels: particle sizes are between 2-6mm and it is easily visible to the naked
    eye. The particle shapes are quite similar to the above gravels.


  • Coarse
    sands: particle shapes are angular, subangular, flat, rounded, and elongated
    with sizes between 0.6-2mm.
  • Medium
    sands: sizes are between 0.2-0.6 and it is visible to the naked eye. Shapes are
    the same as coarse sands.
  • Fine
    Sands: particle shapes are the same as coarse and medium sands with 0.06-0.2mm and
    it is visible to the naked eye.

Fine Soils

  • Silts:
    Particle sizes are between 0.002 – 0.06 mm and it comes in coarse medium, and
    fine. The grain sizes are not visible to the naked eye.
  • Clays:
    It is not easy for people without geotechnical knowledge to recognize the difference
    between silt and clay. Clay materials have intermediate to high plasticity and they
    will shrink in drying weather which usually leaves cracks.

Organic Soils

  • Organic
    clay, silt, or sand: the sizes are varying and contain substantial amounts of
    organic vegetable matter.
  • Peats:
    particle sizes are varying and predominantly plant material which remains dark
    brown and black with a distinctive smell.

Each one of the above soil types has its own characteristics and strength which will be tested on-site to find out. Geotechnical engineers or geologists will go on-site to test the soil and write the soil description in your geotechnical or soil report.

In addition, geotechnical engineers will inspect your
site to make sure there are no geotechnical hazards on your site. After inspection
and soil testing, the field data will be analyzed to make sure the soil
underneath your proposed building has enough strength. Furthermore, the
geotechnical or Geotech engineer will give you the values for the undrained or
bearing capacity of the soil. As a result, the geotechnical report will give you
recommendations on what type of foundations are suitable for your projects.

A geotechnical report also will help the structural
engineers to design an appropriate foundation for your proposed buildings or

Overall geotechnical or soil report helps you to find out the information underneath the ground to design a suitable foundation. So let’s contact geotest group and find out the cost of the Geotech report for your project.

Team Technical Services the opportunity to offer their high-end portable digital pressure calibrators and digital test gauges to complement.

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