Project description
On behalf of the City of Schlieren, Stahlton carried out a GPR survey of the post-tensioned Gasometer Bridge. Using the Proceq GS9000, the team mapped the concrete cover and the layout of the tendons across the deck. Based on these results, a targeted inspection opening was positioned at the tendon, where the condition of the duct and grout was verified visually. All data was documented in INSPECT, giving the project engineer a clear basis for planning the next steps – with a minimum of openings.
AQUILA’s contribution
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The Gasometer Street Bridge in Schlieren, Switzerland is a four-span post-tensioned road bridge from 1988 over the SBB railway tracks near Zurich, and its owner needed a reliable basis for its repair planning and 2027 budget, with a focus on the prestressing.