1Laboratoire de Géotechnique, Infrastructure Aménagement hydraulique, Faculty of Civil Engineering/USTHB, BP. 32 El Alia, Bab-Ezzouar, Algeria. E-mail: akchiche_m@yahoo.fr
2Laboratoire de Géométraux, Environnement et Aménagement, Université Mouloud Mammeri, BP.17, 15000, Tizi-Ouzou, Algeria. E-mail: bahar_rm@yahoo.fr
The excavation process for a tunnel changes in terms of its ground conditions and the stability of surface buildings in urban areas. This paper describes the treatment of tunneling problems at Algiers metro tunnel which was realized according with to the New Austrian Tunneling Methods (N.A.T.M). In this study, a two dimensional finite element analysis was conducted using CESAR-LCPC software to determine the variation of the settlement that is affected by the jet grouting clearance and the coefficient of the deconfinement. Analytical approaches to estimate the tunnel settlement were used. The results obtained by this software were compared with actual field measurement.
tunnel, jet grouting, settlement, finite element method
