GSI was contracted to design and build a solution for the slip, taking into consideration; limited access for residents, ongoing instability of the slope, high groundwater and a nearby stream requiring environmental controls. This project also had to be managed during the wet winter months.

To remediate the landslide, GSI’s solution was implemented over several stages. Earthworks were completed to remove the slip material and create a temporary working platform then 27 steel-reinforced (5.4m deep) concrete  bored piles  were installed to stabilise the ground. The final stage involved preparing the area for a GCS (Geosynthetic Clay Systems) wall and drainage blanket installation. The build required a close working relationship with the client and adaption of plans to manage the active slip and poor ground conditions that also necessitated GSI to install temporary sheet piling to provide a safe working area.

The GCS wall fully restored the road’s width, while the piles provide long-term resilience. An integrated stormwater and drainage system was also installed to manage the factors that caused the initial failure, ensuring the road’s longevity.