Application d’un SIG et modélisation numérique pour l’étude géotechnique des terrassements dans la pénétrante de Djen Djen-Tronçon de la wilaya de Jijel (PK 0+000 – PK 48+000)

Abstract

The present work is part of the project of the motorway penetration planned between the port of Djen-Djen and the East-West motorway at the level of the city of El-Eulma, which extends over approximately 110 km. The section of our study located between PK 0 + 000 and PK 48 + 000 shows several unstable zones characterized by important landslides, which can cause serious instabilities during the earthworks and even damage to the future road infrastructure. The objective of our work is to carry out a cartographic analysis of the susceptibility to ground instability along the route of the motorway between PK0+000 and PK 48+000 using a geographic information system Arc GIS 10.5, in order to identify the areas most likely to trigger landslides. After the identification of landslide triggers, the stability of an existing landslide on the route of the ring road was analysed at the level of an embankment at KP44+500, using the Plaxis software, and a reprofiling solution was proposed as an alternative solution to ensure the stability of the embankm