Analyse inverse pour le dimensionement et optimisation de soutènement d’un tunnel dans la pénetrante ( BOUIRATIZI OUZOU) Cas du tunnel de Draa el mizan

Abstract

The digging of the tunnel implements a more complex stability study, themechanical parameters in the massif change as the excavation progresses, in this case the quantity of support assessment remains difficult, with a choice of the economic and the security of the work; This work deals with the computation by the method of inverse analysis which makes it possible to define the mechanical parameters of the solid mass during the digging - where these parameters are not constant and the geotechnical investigations are insufficient - with a coupling of the experimental and digital displacement measurements in finite elements, the error between these measures calculated by optimization of the error function, the minimum of error takes into account their characteristics (parameters, displacement ...,); The identification of these characteristics allows the sizing and evaluation of the appropriate support elements