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Solutions

Ground Improvement

Overview

Pioneering ground solutions for modern construction

As urbanisation and population growth surge, so does the need for engineered ground improvement solutions.

The escalating construction and retrofit of buildings and infrastructure highlight the importance of foundation performance, increasing longevity and safety.

Mainmark specialises in advanced ground improvement methods. Ground improvement modifies a soil’s properties, improving its load bearing capacity or resilience against liquefaction. Mainmark specialise in delivering a suite of technologies that cover densification, solidification, and soil replacement methods.

We use our Teretek® resin injection technology to enhance soil properties beneath existing structures. In areas with challenging ground conditions, we use Terefil® to replace the existing soil with an engineered lightweight, cellular concrete raft. Our permeation grouting and jet grouting techniques solidify soil, increasing load bearing capacity.

Technologies

Find out more about our ground improvement technologies

Resources

Read more about our ground
improvement research

Resin Injection Ground Improvement Research Trials – Avondale and Bexley Red Zone Christchurch
Use of expanding polyurethane resin to remediate expansive soil foundations
Structure and properties of expanding polyurethane foam in the context of foundation remediation in expansive soil
Resin injection as a ground improvement method

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Mainmark

© 2025 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.

Mainmark Ground Engineering (NZ) Ltd

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Solutions

Ground Improvement

Subsidence Repair

Re-Levelling

Void Filling

Slab Lifting

Crack Wall Repairs

Sinking Floor and Slab Repair

Sinking Foundation Repair

Underpinning

Soil Replacement

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Residential

Seismic

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Teretek®

Terefil®

JOG

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Locations
Mainmark Auckland

50 Parkway Drive, Rosedale, Auckland 0632

 

Mainmark Christchurch

2 Baigent Way, Middleton, Christchurch 8024

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