Caractérisation géotechnique des terrains situés sur le tracé de la deuxième rocade d’Alger Tronçon : Zeralda-Douera

Abstract

This work has as main objective a geological and geotechnical characterization of a stretch of highway connecting Zéralda to Douera over a length of 10km. The study begins, firstly, by general presentation of the highway. It continues with a description of the study area from a geomorphological, hydrological, hydrogeological, geological and seismic point of view. The study continues with a geotechnical analysis of the land traversed by the highway (laboratory and in-situ recognition results), and an interpretation of the results according to the standard values existing in the bibliography. This geotechnical analysis allowed, on the one hand, to recommend a level of foundation of the structures (refusal level of the SPT test), and on the other hand, to carry out a study of susceptibility to landslide risk for each zone of the highway. Finally, the last part of this work made it possible to find the appropriate solutions for a case of instability located in the oundations of a viaduct.