The San Antonio “Y” includes post-tensioned segmental concrete box bridges with a combined length of 22 miles. Post-tensioning anchorages and tendons were inspected by SDR to assess existing corrosion and other deficiencies of the structure and to determine the severity and extent of the deficiencies. SDR’s team performed a detailed post-tensioning (PT) non-destructive testing (NDT) investigation to access the areas behind the anchorages and the PT tendons to locate voids and steel tendon corrosion. Voids and steel corrosion were discovered, analyzed, and presented to the Texas DOT in a comprehensive report with repair recommendations. The work included conducting the detailed inspection, evaluating existing conditions, recommending repair methods to address existing deficiencies, and conducting a load rating reflecting the existing bridge conditions.

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