Strains and displacements in a new type of slurry wall: research field (2)

The subject of the project was a slurry wall made of a new type of material: fibre-reinforced concrete mixed with the ground. As this technology must be carefully checked before use, EpsilonRebars were used for this purpose. The structural performance of the wall was monitored during the deepening of the excavation as well as during the mechanical load tests. Thanks to Nerve-Sensors, it was possible to detect cracks but also to calculate horizontal displacements.

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

Distributed measurements of strains, cracks and displacements at the same time
Full deformation and temperature control along the entire length of slurry wall
Simultaneous analysis of both compression and tension zone
Measurements during deepening of the excavation and mechanical load tests

Results of using the DFOS monitoring system

The slurry wall was loaded using hydraulic jackets. The figure shows example horizontal displacement profiles calculated based on strains measured by EpsilonRebars during subsequent load steps. The structural performance of the Nerve-Sensor system was proved up to the total failure point of the wall. A very good agreement with reference techniques was obtained.ate horizontal displacements (shape changes).

Technical specifications

12 800 measurement points
128 m of sensing path
16 x EpsilonRebar
construction & load tests

Example results

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John Doe

Project partner

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