From Soil to Structure

Geotechnical Investigations and Reports

Navigate the Depths with Confidence - Our Reports, Your Project's Assurance

Every building consent application in Northland requires geotechnical input. Core Engineering carries out thorough site investigations and prepares reports that councils can act on — giving your designer the foundation parameters they need and giving council the information required for consent approval.


We use industry-standard equipment and testing methods — hand augers, dynamic probe (DPSH), CPT (cone penetration testing), trial pits and laboratory testing — selected for the specific requirements of your site and project type.


What are Investigations and Reports? Why are They Necessary?

Geotechnical investigations and reports are essential components of the planning and design process for construction projects, particularly those involving structures and infrastructure. These services are provided by Whangarei geotechnical engineers and geologists to assess the subsurface conditions of a site.

Here's a breakdown of what geotechnical investigations and reports involve:

Site Investigation

Soil Sampling

Our Whangarei geotechnical engineers collect soil samples from different depths to analyse the soil properties, such as composition, density, and moisture content.

Rock Sampling

If the project involves rock, samples are collected and tested to understand its strength and other characteristics.

Boreholes and Test Pits

Whangarei Engineers use boreholes and test pits to gather information about the soil and rock layers beneath the surface.

Laboratory Testing

Soil Mechanics Tests

These tests include various analyses to determine soil properties, such as shear strength, compressibility, and permeability.

Rock Mechanics Tests

If rocks are present, tests are conducted to assess their strength, durability, and other relevant properties.

Analysis and Interpretation

Foundation Design

Our expert geotechnical engineer analyses the data to determine the type of foundation suitable for the structure based on soil conditions.

Earthquake Analysis

In seismic-prone areas, the investigation may include seismic hazard assessments to design structures that can withstand earthquakes.

Report Preparation

Geotechnical Report

A comprehensive report is prepared, summarising the findings of the geotechnical investigation in Whangarei. This report includes recommendations for foundation design, slope stability, and other relevant aspects.

Risk Assessment

Potential geotechnical risks, such as landslides or settlement issues, are often addressed in the report.

Our list of Geotechnical Engineering Solutions:

Subsoil investigations e.g. Hand augers, CPT, DPSH, sampling.

Geotechnical reports

Land instability assessment and remedial design

Foundation assessment

Earthwork monitoring

Settlement analysis

Liquefaction assessments

Temporary Excavation

Peer review of geotechnical designs

Navigating Subsurface Challenges

Core Engineering geotechnical reports are written to directly support building and resource consent applications with Whangarei District Council, Kaipara District Council, Far North District Council and Northland Regional Council. Our reports provide the foundation parameters, ground hazard assessments and geotechnical recommendations your designer and council need.


Here's why you should partner with us:


Expertise That Digs Deep

Our CPEng-qualified geotechnical engineers have direct hands-on experience across Northland ground conditions — from soft alluvial soils and peat in low-lying Whangarei Basin areas, through to volcanic terrain around the Bay of Islands, sandy coastal formations at Mangawhai and Bream Bay, and heavy clay soils throughout the Kaipara District.


Comprehensive Solutions

No two projects are the same. That's why we offer customised geotechnical solutions to meet your specific needs. From soil sampling to rock mechanics tests, we cover the full spectrum of services to ensure a thorough understanding of your site.


Mitigate Risks

Our reports identify and quantify geotechnical hazards — including liquefaction, slope instability, compressible soils, expansive clays and aggressive groundwater — and provide specific recommendations to manage these risks in your project design.


Timely, Cost-Effective, and Reliable

We understand that geotechnical investigations are often on the critical path for consent applications. We schedule site visits promptly, use efficient testing methods and write reports that are clear and council-ready — not padded with unnecessary caveats.

WE GO FURTHER TO DELIVER BETTER RESULTS

PROUDLY SUPPORTING OUR CLIENTS

★★★★★

“As a home builder we have had some very good results from Core in our coming jobs — our clients managed to save considerable amounts of money when it came to the design of slabs, foundations and structural.”

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Ric Butturini

Local Guide · September 2024

★★★★★

“Really helpful and sensible solutions — great to have these guys locally.”

A

Andy Corsbie

Local Guide · April 2023

★★★★★

“Big project but we got there in the end — great doing business with Core Engineering.”

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Warren Halvorsen

Local Guide · January 2023

Areas We Serve Across Northland

Waipu Office ★ Whangarei Mangawhai & Waipu Kerikeri & Bay of Islands Dargaville & Kaipara Far North & Kaitaia Kaipara District

Core Engineering Solutions is your partner in developing a strong and innovative future. We offer precision design and innovative problem-solving through our civil, structural, and geotechnical engineering services in Whangarei.


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