Product Features and Installation: A Perfect Re-Pairing: GEOWEB Green Walls with Leca Lightweight Aggregate The design engineers recommended that the GEOWEB System sections form the wall fascia with a minimum depth of three cells, thus creating a deep integrated section resistant to movement. Calculations were run to determine the factor of safety against sliding, overturning, and bearing capacity failure, and the wall design was deemed acceptable. The GEOWEB Reinforced Wall was designed to include the Greenfix 3PE geogrid for earth reinforcement, and the GEOWEB Wall green fascia was chosen to maintain a natural aesthetic when vegetated. Additionally, the patented ATRA® Wall Key was used to connect the GEOWEB sections at interleaf sections, and it was color-matched to the green fascia. The selected infill was the LECA® Lightweight Expanded Clay Aggregate (LWA) due to the much lower horizontal earth pressures it allows. Approximately 11,000 cubic meters (387,462 f3) of LWA
Performance and Sustainability Presto Geosystems' GEOWEB Geocells offer industry-leading durability, design flexibility, and performance. The high-density polyethylene (HDPE) material is environmentally safe and has undergone third-party testing for long-term stability against weathering and oxidation. The GEOWEB system's design flexibility accommodates various wall types, infill options, and site conditions while its unique structure minimizes hydrostatic buildup and enhances stability. The GEOWEB Retaining Walls are made from premium HDPE resin, designed to confine infill materials and resist environmental degradation. This HDPE material is chemically inert and has been proven not to leach harmful substances or microplastics. Not only are the GEOWEB Walls quick and easy to install, but they also offer a more cost-effective and sustainable alternative to traditional MSE walls, such as masonry or gabion block walls. They excel in performance under differential settlement, seismic activity, and hydrostatic pressure—benefits not commonly found in Since its completion in early 2023, the A595 Moresby Hall project has achieved several noteworthy milestones. It is now the largest GEOWEB Retaining Wall installation in Europe. The success of this installation was enhanced by the combined use of GEOWEB Geocells and LECA® Lightweight Expanded Clay Aggregate (LWA) as infill material. Both materials contributed to a sustainable and cost- effective solution that optimized stability and minimized the risk of future landslides. The project has also earned recognition from English Heritage for its cultural importance, especially in relation to 12th-century settlers in the region. With this state-of-the-art earth retention system in place, featuring both GEOWEB System and LECA technologies, these historically significant embankments will remain stable and secure for generations to come. traditional systems. Project Results
was used to fill the GEOWEB Wall sections. Installation was designed for speed and ease, using materials that are both lightweight and easy to assemble. Once infilled, the GEOWEB front panels were topped with topsoil and seed to create the required vegetated finish. Seed may also be mixed in with topsoil prior to infill, hydroseeding methods can be employed, or voluntary native vegetation can be used. The choice of plant species is not critical to the geocell's functionality, so low-maintenance, native varieties are generally recommended. The GEOWEB Walls are both aesthetically pleasing and environmentally friendly, requiring no maintenance for vegetation and capturing stormwater runoff. Horizontal terraces collect rainwater, minimizing runoff and erosion from the impervious roadway surface. Local grasses and flowering vegetation will help ensure easy growth with a natural look, especially when using the green ATRA Wall Key.
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