SOLUTION

WJE utilized various access methods during the six-week condition assessment, including under-bridge inspection vehicles, aerial lifts, and technical rope access techniques. To efficiently collect field information, WJE's Plannotate data collection application was used. The tablet-based system allowed for information sharing at the site, at the office, and outside of WJE. Connection information, including previous inspection and retrofit data, were available to inspectors during their work. Using the interactive web-based software, WJE engineers reported their findings quickly and accurately, at times uploading up to 1,500 pictures a day.

Exploratory deck openings, located using GPR, were made to inspect the condition of representative straight and draped PT tendons and anchorage points.

In-plane fatigue data were collected using an NI Wireless System to avoid running long lead wires. Connection instrumentation utilized the Campbell CR9000X. Strains and displacements were measured under typical traffic and during load tests completed using rolling traffic closures. WJE engineers also provided finite element method guidance and quality assurance reviews as well as retrofit development during the work.