Service 03 / 11
Soil nails & ground anchors
Passive and tensioned reinforcement installed, tested and recorded to the geotechnical design.
What it does
Soil nails are steel bars drilled into a slope face and grouted along their full length, tying loose ground back into the stable material behind it. Combined with a mesh or sprayed-concrete facing, they reinforce cut faces, over-steep banks and slip scarps without large excavation. Every layout is installed to an engineer's design and proof-tested before sign-off.
Methodology
How the work runs
Every stage is matched to the engineer’s design and the conditions found on the face.
- 01
Setout and drilling
Nail positions are set out to the engineer's layout and holes drilled at the specified angle and depth, by rig or on rope access depending on the face.
- 02
Install and grout
Steel bars are placed and grouted along their full length so each nail bonds to the ground over its entire depth.
- 03
Facing and plates
Bearing plates are fitted and the face secured with mesh or sprayed concrete to lock the surface between nails.
- 04
Testing and sign-off
Selected nails are proof-loaded to the specified test load and the results submitted to the engineer for sign-off.
Field proof
What this work looks like
Wide context, action on the face and the installed result—photographed on Geo Mana jobs.
Questions
Common questions
What types of ground stability services do you provide?+
Geo Mana delivers slope stabilisation, slip repair, soil nails, ground anchors, rock bolts, mesh and facing systems, difficult access, retaining remediation, drainage, erosion control, field testing, condition assessment and planned slope maintenance. The right combination depends on the ground, design and access.
How do I know if my property needs slope stabilization?+
Signs like cracks in the soil, leaning retaining walls, surface erosion, or recent slips are indicators of slope instability. If you're unsure, we can conduct a site inspection to assess the risks and recommend the right solution.
What areas of New Zealand do you operate in?+
Geo Mana is based in West Auckland and mobilises across New Zealand. Commercial and specialist crews can deploy nationally; residential work is assessed by scope, access and location.
Next step
Talk to us about your slope
Send through photos and a rough location. We will tell you what the repair likely involves and whether it needs an engineer.