Strains and cracks in a new type of slurry wall: research field (1)

The subject of the project was the 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, the EpsilonRebars were used for this purpose. The structural performance of the wall was monitored during deepening of the excavation area as well as load tests. Thanks to Nerve-Sensors, it was possible to detect cracks and fractures invisible to other techniques.

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 and cracks invisible to the naked eye
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 load tests

Results of using the DFOS monitoring system

The slurry wall was loaded using concrete slabs. The figure shows example strain profiles obtained from EpsilonRebar during subsequent load steps. It can be clearly observed that a fracture inside the wall was detected under the excavation level. As there was no access for visual inspection, no other technique was able to provide such key information.

Technical specifications

7 200 measurement points
72 m of sensing path
9 x EpsilonRebar
construction & load tests

Example results

Recomendations (optional)

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John Doe

Project partner

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EpsilonRebar Datasheet

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