A SIMPLE METHOD TO ASSESS TUNNEL LINING STABILITY AND ITS APPLICATION

Abstract

In order to assess tunnel lining stability with a small number of covergence data, a simple method has been proposed here. Stresses, strains and displacements of the lining are back-analyzed from relative displacements measured at 3 points on inner boundaries of crown and side walls. Model test results showed high accuracy of the method. The method was applied to a practical tunnel and good applicability of the method was demonstrated by comparing the analytical results and the actual records.