Micro Tunnelling is one of the most effective trenchless technology methods for modern infrastructure upgrades and demand for skilled, reliable services is only increasing around New Zealand.
Whether it’s installing utilities under busy streets or building sewer and stormwater networks, Micro Tunnelling offers precision, safety, and efficiency while causing minimal disruption to life above ground.
What is Micro Tunnelling – and why is it so effective?
Microtunnelling is a trenchless construction technique that uses a remote-controlled tunnel boring machine (micro-TBM) to create highly accurate underground tunnels, usually between one-half and two meters in diameter.
As the micro-TBM advances, pipes are jacked into place behind it and form a stable, fully supported tunnel without the need for open excavation.
Compared to traditional trenching, Micro Tunnelling provides clear advantages: minimal surface disruption, reduced environmental disturbance, and the ability to work safely beneath roads, railways, rivers, and even existing buildings. These make it a go-to choice for civil engineering contractors working on complex urban infrastructure projects, and a true gamechanger in dense areas like Hamilton or Auckland.
What makes it ideal for use in New Zealand’s growing cities?
New Zealand’s largest cities face a swathe of challenges like dense urban layouts, congested roads, and aging water and electricity infrastructure. Traditional open-cut excavation in places like Auckland and Wellington often means road closures, dust, noise, and long delays.
With Micro Tunnelling, underground construction happens quietly beneath the surface so traffic keeps flowing and key infrastructure largely unaffected. In Auckland, this means major water or stormwater upgrades can be completed without shutting down key transport links. In Wellington, the precision and stability of this this form of tunnelling has proven vital for working safely under heritage buildings and in areas with seismic considerations.
Is it safe?
In short, yes — it’s considered one of the safest trenchless solutions available. Operators control the micro-TBM machine remotely which keeps workers out of the tunnel itself. As the machine progresses, the tunnel is supported as it’s excavated which greatly reduces collapse risks.
As with any underground construction project, safety and efficiency depend on a range of geotechnical assessments, skilled operators, and experienced project management.
That’s why choosing the right contractor is essential.
Recommended contractors and providers in New Zealand
Universal Underground Limited (UUL)
Specialists in Micro Tunnelling, pipe jacking, and trenchless technology projects across NZ.
Website: uul.co.nz
Phone: +64 7 823 7415
Email: neil@uul.co.nz
Hadlee & Brunton Ltd
Infrastructure specialists with experience in horizontal boring, trenchless solutions, and municipal water projects.
Website: hadleeandbrunton.co.nz
Phone: +64 3 684 8888
Email: office@hadleeandbrunton.co.nz
Pipeline & Civil Ltd
Auckland-based civil engineering contractors delivering trenchless works.
Website: pipelinecivil.co.nz
Phone: +64 9 276 6844
Email: info@pipelinecivil.co.nz
Fulton Hogan
Major infrastructure company offering trenchless technology services nationwide.
Website: fultonhogan.com
Phone: +64 3 357 4400
Email: info@fultonhogan.com
Pipeworks NZ Ltd
Specialists in underground construction, sewer renewals, and trenchless pipeline rehabilitation.
Website: pipeworks.co.nz
Phone: +64 9 250 0800
Email: info@pipeworks.co.nz