TechSpan® precast concrete arch system associating a three pin, two piece, funicular curve shaped arch to an engineered backfill.
The innovation of this technology is to customize and optimize the system to each specific project’s loading and clearance requirements.
Design methods using Finite Element Method (FEM) accurately defines the optimal radius of curvature of the arch to minimize tensile stresses. Efficiency and economy of design increases progressively as the embankment height over the arch crown increases.
TechSpan® generates a very competitive alternative system for the construction of roadway bridges and roadway cut & fill tunnels and underpasses, and it is efficiently used in combination with our MSE wall product line.