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Impedance-based pile integrity control

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Impedance test on piles

Clermont-Ferrand (63)

Client :                                 SGC Travaux spéciaux

Contracting authority :      MICHELIN

Sol Solution was commissioned by SGC Travaux Spéciaux based in Sainte Foy l'Argentière (69) to carry out impedance tests on piles on the site of the "New Reception Building" of the MICHELIN company in Clermont Ferrand (63).

These tests were carried out in accordance with standard NF P 94-160-4. The piles have a diameter of between 520 mm and 620 mm and lengths of between 7.9 m and 9.4 m. The aim is to check the length and continuity of the pile shaft as well as the quality of the anchoring.

The test consists of striking the centre of the pile head with a hammer, equipped with a force sensor. The return of the mechanical wave, which propagates along the pile, is then measured using a geophone placed on the periphery of the pile head.

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