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
The Thrasher Group provided a new method of surveying to determine the current state of these bridges. Our team combined the best elements of conventional surveying and laser scanning to create a unique product for the WVDOH. The conventional scanning method was used to survey the top portions of each bridge. While this process is a bit lengthier in the field, it is done often enough that survey teams can work with expert precision to collect exactly what information is needed, with low post-process time. The laser scanning portion was used to collect information on the undersides of the bridges. While this is lengthier in the post-process portion because of the volume of data collected, it made for a much quicker, safer process in the field. By combining these two methods, Thrasher was able to create a better process that diminishes risk, decreases cost and time, and vastly increases the amount and accuracy of data collected.
This project received first place in its category in the American Council of Engineering Companies 2018 Engineering Excellence Awards for its innovative approach to surveying and mapping.
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