Colville Anchored Retaining Wall

The Project

The Colville Road project involved the construction of an anchored retaining wall to stabilize a coastal site that experienced a significant landslide. This landslide reduced the width of the road, posing a risk to its stability and usability. The Thames Coromandel District Council engaged us to design a retaining structure that would not only reinstate the road width but also provide additional resilience against future failures.

Our Role

Our role was to provide a design solution with limited access and a tight project timeline. The coastal location presented unique challenges, including the need to manage soil erosion, water drainage and durability. The design incorporated features to address these issues, ensuring long-term stability and functionality of the retaining wall.

The design result was a retaining wall, which includes 10-meter-long 350 SED timber poles supported by grouted rock anchors. The design aimed to provide stability and accommodate potential future failure below the wall.

The construction process involved precise installation of the timber poles and rock anchors. The anchors were grouted into the rock to provide additional support and stability to the wall. This method was selected to ensure the wall could effectively resist the forces exerted by the soil and any potential movements.

The Results

The successful completion of the Colville Road anchored retaining wall has reinstated the road width and provided a robust solution that is resilient to future failures. This project showcases our expertise in designing and constructing retaining structures that address complex geotechnical challenges and enhance the safety and usability of critical infrastructure. The construction team worked efficiently to complete the project within the specified timeframe, ensuring minimal disruption to the surrounding area.