Displacements of a road embankment above the strengthened substrate
In this project, two 3DSensors were installed along a road embankment to measure its vertical displacements. Two independent lines of 3DSensors, each 48 m long, were provided, together with multiple reference measurement techniques: longitudinal and transverse inclinometers, spot tiltmeters and geodetic benchmarks. Vertical displacements were measured in a distributed way with 3DSensors and compared with the results of reference methods.
DFOS Sensors Installed: 3DSensor
Project challenges
Benefits of using the DFOS monitoring system
Results of using the DFOS monitoring system
3DSensors with composite cores were applied, each equipped with four optical fibres precisely arranged around the core. Taking advantage of the strain measurements in all fibres and using a trapezoid calculation method, vertical displacements were calculated with very high precision and in a distributed way along the sensor, with a spatial resolution of 10 mm. The results from 3DSensor are presented in the figure below (red line) together with the results of reference inclinometer measurements (green line). The compliance of both methods was very high; the mean difference was less than 0.1 mm with a standard deviation less than 0.5 mm along the entire measurement length. It is worth noting that the 3DSensors approach involves a thermal self-compensation system.
Example results
Recomendations (optional)
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
John Doe
Project partner
