INVESTIGATION ON THE APPLICABILITY OF DISCONTINUUM ANALYSIS METHOD FOR THE LARGE CROSS SECTION TUNNEL

Abstract

As numerical models to take discontinuity of rock mass into account, the finite element method with joint elements (assuming infinitesimal deformation), finite difference dynamic discontinuum analysis in which motion equation is solved in order to deal with the large deformation problem, and other methods have been developed.
This report presents the outline of investigation on the field application of the numerical method to the tunnel support design, by means of comparing the results of discontinuum analysis and measured field data, as one method to design the rational support structure of large cross section tunnel in New Toumei-Meisin Expressway.