DuraGreen - Reinforced Soil System

Vegetation of the slope face is critical to the long-term performance of reinforced slopes. The contractor must ensure the slope is vegetated by either hydro seeding or placing a seeded soil mix directly into the facing bags. The soil filled bags serve to protect the bare soil face against erosion until the vegetation is established, assist in reducing runoff velocity for increased water absorption by the soil, thus promoting long-term survival of the vegetative cover and reinforce the surficial root system of the vegetative cover.

The DuraGreen installation instructions give details for establishing vegetation on the face. It is a requirement of the system that the face is protected with adequate growth and Cirtex has many examples of successful projects to demonstrate the effectiveness of this system.

The primary geogrid, StrataGrid, is approved by NZTA for use in New Zealand projects and has a design life of 100+ years.

DuraGreen is for slopes up to 70 degrees and where the face has long-term support from the geogrid. DuraSlope is for slopes 45 degrees and less where the face is not supported by the geogrid reinforcement and is protected by an erosion control product.