Performance Evaluation of a Bridge Infrastructure Using Terrestrial Laser Scanning Technology

Monitoring techniques, used to assess the condition of infrastructures, have been impacted by the rapid developments in remote sensing technology. While these technologies have improved performance evaluation, cogent procedures for evaluating ground movements have yet to be developed. This article presents an application of the three-dimensional terrestrial laser scanning (3D-TLS) technology for assessing the performance of bridge infrastructures, including highway embankments, bridge decks, approach slabs, abutments, and columns supported on drilled shafts. In this research study, a framework was developed, using 3D-TLS technology, to evaluate the ground movements. The survey process, variables, and analysis were demonstrated by performing the field operations at a rehabilitated bridge infrastructure located in North Texas. The analysis depicted vertical movements that were experienced by the approach slab during different time periods. The validation of 3D-TLS results was performed by comparing the vertical movements from the four horizontal inclinometers installed underneath the pavement. The comparison studies revealed similar movement patterns of both inclinometers and processed scans, while the latter provided detailed soil movements over a larger area.