Retrofit of a Steel-Reinforced MSE Wall

Brian Hall, Alireza Afkhami, Amri Benjamin

In the proceedings of: GeoRegina 2014: 67th Canadian Geotechnical Conference

Session: Transportation Geotechnics

ABSTRACT: This paper describes the retrofit of an existing mechanically stabilized earth (MSE) wall where concerns existed that the connection between the steel reinforcing and precast concrete wall facing panels had been compromised. The paper describes the investigations undertaken, outlines design constraints and performance considerations, and discusses design and construction. The paper concludes by briefly discussing retrofit design and construction approaches used on three further MSE walls with similar concerns. The field investigation program included constructing a test strip to characterize the shot rock MSE zone backfill and a field loading test to assess the stiffness of the backfill. After considering a range of approaches that included disassembling and rebuilding the wall, constructing a buttress wall, installing a soldier pile wall, grouting the backfill, and soil nailing, the retrofit finally adopted consisted of soil anchors which applied load through a load distribution concrete wall.

RÉSUMÉ: es critères de performance ainsi que les défis de prévues pour la mise à niveau future de 3 murs de terre armée qui présente une problématique similaire. Une réplique du mur a été réalisée dans le but de réaliser les essais de terrain. Les essais de terrain visaient à conSoil nail, la solution de mise à niveau retenusoil anchors qui transfère la charge via un mur de béton fondé sur pieux vises.

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