ETUDEGEOPHYSIQUE D’UN GLISSEMENT DETERRAINMENACANTLA ROUTE NATIONALE43DANS LA WILAYA DE JIJEL.

Abstract

Thegeophysicalinvestigationconductedby the electrical methodon the site ofRasEl Afiain the Wilaya ofJijel,aims tostudy the landslideofa slopeunstableberms along the right bank of the National Highway No.43towardsJijel city. In relation tothe nature of thegeological settingand the problemofelectrical resistivitymethodseems most appropriate to highlight thecontrast between theelectrical resistivityand surfaceargillaceous sandstone blocksandunderlyingshale.This approachhas providedinteresting results on thenature of the terrainand their spatial distribution.The sitewas surveyedbyseventeen (17)electrical soundings usinga device such asSchlumbergerAB =90 metersdepthinorder to locatepotentialsliding surfaces.A profile tomographyon 50m long is made inusing adipole-dipolewhere the distance betweenelectrodesis 3 mand05investigationlevel.