Superstructure Monitoring
Strain, deflection, and rotation monitoring of new and old superstructures
The two bridges carried I-84 eastbound & westbound over Marion Avenue, Southington, CT. On a scale of zero to nine, both bridges received a superstructure rating of 4. This was due to diagonal cracks as well as exposed reinforcement and tendons. In order to replace these superstructures, Self Propelled Motorized Transporter (SPMT) platform vehicles were used to lift out the existing structures and set the new structures. This procedure took place over 56 hours, minimizing road closure of I-84 and related public disruptions.
Geocomp installed instrumentation to provide real-time strain, deflection, and rotation monitoring of the new I-84 eastbound & westbound superstructures during the transportation operations in advance of the superstructure replacement. Real-time strain measurements were monitored via Geocomp’s data management system, iSiteCentral® during move operation to identify unanticipated stress on the new structures. Geocomp previously installed strain gages in the girders and deck.