Vertical and horizontal distributed strain measurements within a road surface

This experimental project involved a new type of road with a foam-concrete substructure. EpsilonRebars were used to monitor structural response on mechanical load tests. Thanks to the appropriate installation methods, it was possible to provide measurements not only along the horizontal sections but also along with the vertical ones. It’s worth noting that there was no reinforcement facilitating the installation within the entire structure.

DFOS Sensors Installed: EpsilonRebar

Project challenges

How to apply non-invasive diagnostics in demanding historic structures?
How to get precise measurement data to detect local damage and imperfection?
How to measure detailed strain profiles over the entire height of the brick masonry wall?

Benefits of using the DFOS monitoring system

Measurements of internal strains inside the foam-concrete substructure
Strain analysis along the horizontal and vertical sections inside the structure
Possibility of calibrating numerical models, including dynamic effects
Detailed data for new road structure design procedures (optimisation)

Results of using the DFOS monitoring system

EpsilonRebars, as a part DFOS-based nervous system, allowed for detailed analysis of the deformation state of the new type of road caused by the mechanical loads (truck). Sensors were successfully installed despite difficult conditions within the construction site. Strain measurements within the horizontal and vertical sections, including the short-term slippage, were performedwith high-spatial resolution.

Technical specifications

3 200 measurement points
32 m of sensing path
8 x EpsilonRebar
short-term (load tests)

Example results

Recomendations (optional)

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John Doe

Project partner

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