In this work, a simple, yet effective procedure for simulating mechanized tunnelling operations with the FE method in 2-d plane-strain conditions is presented, which allows to take into account the ovalization of the tunnel boundary associated with a non-uniform gap closure, and includes, as a special case, the classical method of ROWE et al.  and LEE et al. . The importance of tunnel ovalization on the predicted displacement field is demonstrated by means of a parametric study on a idealized tunnelling problem. The application of the proposed method to real tunnel excavations is demonstrated by means of two class C predictions of actual ground deformations as observed in two different case-histories of TBM tunnelling in soft clays.
In this work, a …
AUTORI: Tamagnini C., Miriano C., Sellari E., Cipollone N.
RIG ANNO:2004 NUMERO:1
Numero di pagine: 11
Articolo completo: https://associazionegeotecnica.it/wp-content/uploads/2010/03/RIG_2005_1_011.pdf