ETUDE GEOPHYSIQUE D’UN GLISSEMENT DE TERRAIN MENACANTLA ROUTE NATIONALE 43DANS LA WILAYA DE JIJEL

Abstract

Thegeophysicalinvestigationconductedby the electrical methodon the site ofRasEl Afiain the Wilaya ofJijel,aims tostudy thelandslideofa slopeunstablebermsalong theright bank of theNational Highway No.43towardsJijel city. In relation tothe nature of thegeological settingand the problemofelectrical resistivitymethodseemsmost appropriateto highlightthecontrastbetween theelectrical resistivityand surfaceargillaceoussandstone blocksandunderlyingshale. This approachhas providedinteresting results on thenature of the terrainand their spatial distribution. The sitewas surveyedbyseventeen (17) electrical soundingsusinga device such asSchlumbergerAB =90 metersdepthinorder to locatepotentialsliding surfaces.A profiletomographyon 50m longis madeinusing adipole-dipolewhere the distance betweenelectrodesis 3 mand05investigation level.