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Keystone® TW3 wall system is a proven, practical engineered earth retaining wall solution. The system consists of pre-cast concrete modular facing blocks, securely connected with Tensar® RE uniaxial geogrids. This helps to reinforce the soil behind to create a stable and maintenance-free retaining wall structure with up to 120 years design life.
To install, the Keystone TW3 concrete facing blocks are simply dry-laid without cranes required for construction. The 40kg weight of the standard 200mm high block is suitable to be handled by a two-person team.
Keystone TW3 is a cost-effective alternative to traditional concrete retaining walls, ideally used for infrastructure works including bridge abutments, culvert and tunnel portal entrances and technically challenging retaining structures.
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WHY CHOOSE KEYSTONE TW3?
- Saves up to 50% in construction costs compared to traditional construction methods, such as reinforced concrete retaining walls
- Strong, reliable connection that permanently supports the face, even under severe heavy loads or in seismic conditions such as earthquakes. Full-scale shaking table tests, with horizontal accelerations up to 0.63g, have demonstrated minimal face deflection
- Versatile retaining wall system that can accommodate curves, stairs and other design requirements
- Quick and easy installation without the need for cranes, as it is lightweight and dry-stacked which helps reduce construction costs
- High pH level of the concrete blocks does not impact the durability and functionality of HDPE geogrid reinforcement throughout the lifespan of the structure
- Design support service using state-of-the-art software, TensarSoil
- Certified by BBA-HAPAS (British Board of Agreement) with 120-year design life for infrastructure, industrial and residential applications
Our team of experienced engineers can help you with your next project using TensarSoil design software, available free to Geofabrics clients.
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FUNCTION
Retaining
Geosynthetic or geogrid acts to support soil laterally so that the structure can be retained at different levels on the two sides. Retain (holds back) any material (usually earth) and prevents it from sliding or eroding away. Gravity retaining and reinforced soil retaining walls are designed to resist the material pressure of the material that it is holding back.
