No time for error
Chapter 3: Automating for accuracy
Automating for accuracy
To precisely understand the strain on the bridge from the shift, the surveyors made an inventory and consistently re-measured all the prisms. This provided a baseline to compare against where the bridge should be and where it actually was. These measurements were taken at every 4m of the shift. The discrepancy in the theoretical and actual results was recovered with mechanical adjustments to the trench bottom.
“For such a repetitive but critical process, automation is the best option to avoid operator error due to fatigue or stress,” said Bazerque. “We were able to use the auto set-up of Leica Viva, avoiding costly errors.”
At each cycle, the surveyors got a picture of deviations and compensation made. The table allowed the firm to keep a written record of the transactions.
These challenging operations are often under particular conditions, such as at night or in difficult environments, adding stress to the issues. The methods used are then cobbled together in-house, and, unfortunately there are no records. This time, however, SCP Bertheau Saint-Criq was able to provide its customer a specific progress report with the hours of measurement and results, which is a guarantee of quality.