Project Overview
Moore Construction delivered critical recovery and stabilisation works along Kenepuru Road at Portage Heights, restoring key infrastructure following slope instability and ground movement.
The project required a multi-disciplinary approach combining retaining systems, slope stabilisation, drainage, and road reconstruction to ensure long-term resilience within a challenging and environmentally sensitive landscape.
Engineering Solution
The stabilisation strategy incorporated anchored H-pile retaining walls, soil nailing systems, and comprehensive drainage infrastructure, providing both immediate support and long-term performance.
The design was tailored to suit steep terrain conditions, managing both structural loads and groundwater to prevent future instability.
Scope of Works
- Construction of anchored H-pile retaining walls
- Slope stabilisation using soil nails and erosion matting
- Installation of subsoil drainage systems
- Bulk earthworks and site preparation
- Concrete capping beams and structural works
- Culvert removal and DN500 HDPE installation
- Pavement reconstruction and chip sealing
- Kerb, channel, and safety infrastructure
- Traffic management and staged road access
Key Engineering Features
- 250UC73 steel H-piles installed in bored concrete foundations
- Ground anchor system providing lateral support
- Custom in-house fabricated drill mast for anchoring works
- Megaflo drainage system for groundwater management
- Integrated erosion control and slope protection systems
Outcome
The project successfully restored structural integrity to the road corridor, providing a stable and resilient infrastructure solution capable of withstanding future environmental loading.
