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A379 Bridge, Devon

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Contractors

Graham Construction

Products

Vertica® Retaining Wall

Contractors

Graham Construction

Products

Vertica® Retaining Wall

AG’s Vertica® Segmental Retaining Walling has been used in the creation of a new 36-metre long bridge spanning the A379 in Exeter, County Devon. Designed as a gateway feature, the structure will allow pedestrians and cyclists to cross the busy carriageway to access a new housing development, a local school and community facilities.

Supporting both ends of the bridge, Vertica’s 4 degree block has been used throughout the striking four tiered design to create the abutments and wingwalls. This innovative approach offers a more cost-effective and sustainable solution compared to standard methods due to reduced geogrid and soil excavation requirements. The distinctive curved levels, ranging from 2m to 7.4m in height, feature impressive internal and external radiuses achieved through Vertica’s tapered design.

Nico Brusa from Tailor Engineering stated, “The segmental retaining abutment walls have been designed to directly support the bridge beams, with the reinforced soil structure acting as direct bridge abutment. We were inspired by the American GRS-IBS concept, as well as the RRR Japanese approach for this project – instead of using low strength geogrids for the wing walls, we designed the walls with high strength strap-based geosynthetic reinforcement, thus distributing the bridge loads throughout the structure.”

A379 Bridge, Devon featured image
A379 Bridge, Devon featured image

Products used in this design