Ground Anchor Systems Limited

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Ground Anchor Systems is New Zealand’s leading contractor for specialty civil works including the installation of ground anchors, difficult access piling, slope stabilisation and seismic upgrades.

Night works at Rocks Road, Nelson
20/08/2026

Night works at Rocks Road, Nelson

18/08/2026

Always nice to catch up with the owners onsite and give them a look at the work going into their build!

At Stone Street, the team is carrying out testing on a residential palisade wall. Ground conditions here are highly plastic silty soils and sands, so piles were designed to float the building’s foundation while the palisade wall retains steep ground from shifting toward the neighbouring property.

Since our last visit, the builder has begun the foundation around our piles, with the northeastern daylight anchor kept exposed until backfilled to ensure accurate testing results without compromising the waler tied into our anchors.

Testing is now underway, with tendons to be locked off at 150 kN and confirmed with a lift-off test. Grease caps will then be installed over the headworks to prevent corrosion, before the project is handed over to Blair Coupe Building.

06/08/2026

Skyline Stage 5 Rebuild

Preparation is underway at our Stoney Creek yard ahead of Stage 5 of the Skyline rebuild.

Over the past two weeks, the team has been working through the essential groundwork required in advance of installation :

232 ground anchors in total, requiring 388 fully encapsulated bars to be prepared before they’re taken up the hill.

Getting this stage right here, is what will allow our installation phase to run efficiently once work moves onsite at Skyline.

28/07/2026

Peninsula Road, Kelvin Heights

We are onsite to complete 22 test piles, contracted by Dent Construction as part of a ground condition investigation supporting the design of 17 separate retaining walls for dwellings across this hillside development.

Our role on site is to log ground conditions and variations from each pile and take photos and soil samples throughout. This data allows geotech engineers to assess the ground conditions accurately and fine tune the retaining wall designs accordingly to ensure the overall safety of future occupants.

Careful investigation work like this lays the foundation for everything that follows.

26/07/2026

Stone Street, Wanaka

Great progress on this residential build with 10 piles installed for a palisade wall, with a whaler beam constructed on top. Piles below the building level have now been completed and wrapped up, with final core work carried out on Friday.

The team is now drilling back through the palisade wall to install tieback anchors and complete the retaining wall. Anchor holes were formed at a precise 20 degree angle through 200mm diameter ducts cast into the whaler beam. A tight parameter that puts our DTH hammer and drilling team’s precision to the test.

One anchor on this section is particularly technical: the drill rod daylights through the back of the whaler into 4.5m of open space before continuing a further 5m into the adjacent lower level ground.

The next steps will back routing the anchors, awaiting lab compression test results, and completing suitability and production testing ahead of final lock off and encasement.

24/07/2026

Recent progress across two key work areas at Frankton Road :

On the overland flow path ground anchors were previously installed using both hand drill and Marini excavator mounted drill methods. The area has since been meshed and shotcreted, sealing the rock face against the gabion basket wall above.

On Retaining Wall 15, timber lagging installation between piles is now complete to full height and approaching the halfway mark along the wall’s length. A concrete slab will be placed over the retaining wall on completion, forming a walkway within the finished development.

06/07/2026

Quick update from the Moonlight Track Slip

We’ve now finished spraying 40 MPa shotcrete over the mesh, which ties into the anchors we installed previously.

Once it’s cured, the anchor plates go on to lock everything off, securing the slope at the base of the road.

A relatively small job for us, but one that will have a big impact on the residents in the area.

25/06/2026

Earlier this year the team wrapped up a challenging slope stabilisation project on Botanical Hill in Nelson, delivered for Nelson City Council alongside Environmental Engineers, NZ+AU

Before a single bolt could go in, our rope access team manually cleared around 90m³ of material and vegetation from the face entirely by hand. With no machinery access and limited room to move, it was a significant undertaking.

From there, 30 rock bolts were drilled 6 metres into the slope, with all drilling carried out from a basket suspended by a 60 tonne crane to keep the work safe and accurate on a steep face. The bolts then anchored the steel detail and drainage system before 50m³ of steel reinforced shotcrete was applied over two days, working from a fixed man cage on a hiab truck.

Black oxide was added to the mix to help the finished surface sit naturally within the environment, an important detail on a landmark like Botanical Hill.

We’re really happy with how this one came together, and looking forward to more work with NCC and Tonkin + Taylor down the track.

17/06/2026

Moonlight Track, Queenstown : Slope stabilisation underway.

Following a slip below the road, our team installed eight self-drilling anchors beneath the road last week to secure the slope.

Next week we’ll return to apply 200mm of shotcrete across the face, before fitting anchor plates to lock the system off, delivering a stabilised, safe road for the community.

Last week our Queenstown team completed Introduction to Load Slinging with Vertical Horizonz New Zealand The day was a c...
15/06/2026

Last week our Queenstown team completed Introduction to Load Slinging with Vertical Horizonz New Zealand

The day was a combination of theory and practical training to cement existing skills in lift planning, hazard control, equipment selection and applying working load limits safely to industry good practice.

Big thanks to the team at Vertical Horizonz for passing on their expertise.

Address

37 Packham Crescent
Nelson
7011

Telephone

+64800472679

Website

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