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Analysis
of soft soil-structure interaction in tunnelling Ardie
Purwodihardjo, Sylviane Bernat & Bernard Cambou Laboratoire
de Tribologie et Dynamique des Systèmes, Ecole Centrale de Lyon - France Pascal
Dubois Ministère
de l'Equipement, Mission d'inspection spécialisée des ouvrages d'art - France |
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ABSTRACT: Numerical analysis by using the finite difference method was implemented with the aim of developing a procedure for forecasting the effects induced by tunnelling. Various parameters regarding to the soil characteristics, rigidity of the lining and pressures on the working face are analyzed in this study. Two kinds of numerical calculations have been used, i.e. axisymmetric analysis and plane strain analysis for the convergence-confinement method. The constitutive model used for the ground is an elasto-plastic model with the Tresca criterion. The main objective of this paper is to highlight the limits of 2D plane strain calculations when a rigid lining and a reinforcement of the working face of the tunnel are used. |