Risk prevention by classical methods surveying of a bridge structure at Ségou

Abstract

By nature, the structures are degradable elements over time, so it is necessary to monitor these structures over time and whatever means are available to prevent the risks. What focuses this study on an auscultation through the classic measurements and careful calculations of the topography followed by analyzes in an interval of 10 months. The measurement methods are based on the survey by polar coordinates using the total station with Prism (TSP) and the survey by semi-triangulation or intersection using the total station without Prism (TSWP). The pairs of angles were observed (circle on the left and on the right) for each of the methods. The pairs of sequences, the weighted averages at the level of the coordinates and Bearings as well as statistics were calculated. The coordinates of the measurement points found down to the hundredth of a millimeter have undergone statistical processing in order to determine the errors at the temporal level at the same time as at the level of the two methods applied. Beyond that, the standard deviations were determined for possible analyses.