Highest retaining wall of its kind in the UK
The Reinforced Earth retaining walls forming the north of the underpass, on the A465 Heads of the Valley road at Carno, are up to 33m high making it the highest structure of its type constructed in the UK.
The design of the three-tier 33m high Reinforced Earth retaining walls was technically challenging. The design of this type of structure is not adequately covered by the current design codes and required a significant level of design experience and careful detailing to ensure ease of construction and satisfactory performance.
Reinforced soil technology provides an amazingly efficient solution for very high retaining structures. The precast concrete facing panels used have a maximum thickness of 160mm. This offers a huge environmental benefit from lower carbon emissions when compared to other solutions such as cast in place reinforced concrete walls. It also reduces the transportation to site costs by 90% providing environmental safety and community benefits.
Reinforced Earth will be presenting at the GEOTEX Ground & Environmental Engineering Seminars throughout the UK.