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A simplified 3D model for tunnel construction using tunnel boring machines

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2008
auteur(s) Mroueh Hussein; Shahrour Isam
journal (abréviation) Tunnelling and Underground Space Technology (Tunnelling and Underground Space Technology)
volume (numéro) 23 (1)
pages 38 – 45
résumé This paper includes a presentation of a simplified three-dimensional numerical model for the prediction of soil movement induced during tunnel construction using tunnel boring machines (TBM). The model is based upon the generalization of the convergence-confinement concept to 3D tunnel construction. It uses two parameters (Ldec and αdec) which stand for the length of the unlined zone and the partial stress release, respectively. The value of the parameter Ldec can be taken equal to the tunnel diameter, while the value of αdec can be determined by fitting the model to empirical formula, and then adjusted based on settlement registered during tunnel construction.
The capacity of the model is illustrated through an application to a shallow tunnel in soft soil. The comparison of the numerical results to those suggested by different authors shows good agreement.
mots clés Tunnel boring machine; TBM design; Finite element method; Three-dimensional; Non-linear; Shield tunnelling; Convergence-confinement
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