The Problem
Thrasher was hired as a subconsultant for a West Virginia Division of Highways project to assist with the rehabilitation of four bridges across the state that were in various stages of disrepair. The purpose of the mapping/surveying of these bridges was to provide a current look at the structures and identify what features of the bridges needed attention. This, however, is not without complications for high-traffic highway bridges. There are myriad concerns to take into account when planning this type of work, including time, cost, traffic control, convenience to the public, and worker safety.
The Solution
Thrasher introduced a new surveying method to assess the condition of four West Virginia bridges. The team blended conventional surveying with laser scanning to create a more efficient and accurate process.
Surveyors used traditional methods to capture data from the top of each bridge. Though slower in the field, this approach allowed precise data collection with minimal post-processing. For the undersides, laser scanning was used. It gathered large volumes of data quickly and safely, reducing time spent on-site.
By combining both techniques, Thrasher improved safety, cut costs, and boosted data accuracy. This innovative approach earned first place in its category at the 2018 ACEC Engineering Excellence Awards.
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