Marine Resistivity Measurements for the Foundation of Lavrion Old (1888) French Bridge

Marine resistivity measurements can give valuable information for the sedimentation under the sea bottom if the latter is not too deep. The Schlumberger configuration is preferred with its more efficient signal-to-noise ratio. Pole-Pole can give information which is less accurate in horizontal layering but offers deeper detection and possible positioning of lateral inhomogeneities in the event of great resistivity contrasts. <br>The old (1888) iron “French Bridge” in Lavrion Port suffers from corrosion by seawater and displacements and needs protection with the plan all to be mounted in a new substructure with the less visible changes. The marine resistivity survey gives valuable information to the engineer like where the old foundation lays, where to position the geotechnical drillings for additional information and outlines the environment of the structure to be built for the protection of the bridge. <br>