B&N was selected for the in-depth inspection of the Boise Airport Viaduct Bridge. The bridge exhibited issues with water infiltration into its superstructure, prompting concerns about the long-term durability and safety of its post-tensioned concrete components. Following consultation with B&N, it was determined that a standard routine inspection would not suffice, and a more in-depth evaluation of the structure was warranted.
B&N led a comprehensive field evaluation and detailed assessment of the bridge. Our responsibilities included identifying the extent and causes of deterioration, particularly focusing on significant cracking observed in the post-tensioned elements. The bridge’s exposure to a potentially corrosive environment, exacerbated by de-icing practices, heightened the risk of tendon corrosion and further structural degradation, making timely intervention essential to extend the bridge’s service life.
Based on our findings, B&N developed targeted rehabilitation plans to address the identified deficiencies. Key solutions included replacing the anchorage block-outs in the post-tensioning system, performing remedial grouting to fill identified voids and applying an overlay to mitigate further cracking. To enhance safety and functionality, B&N also incorporated an embedded heating system within the sidewalks to prevent ice accumulation and improve pedestrian safety. Throughout the rehabilitation, B&N provided construction oversight to ensure that the repairs were executed according to plan and met the required quality standards.