2003 Volume 13 Pages 407-412
In cases where a parallel shield tunnel is driven along an existing tunnel, the excavation of the new tunnel induces changes in stress occurring around the existing tunnel. In designing a parallel shield tunnel, therefore, it is necessary to examine the influence of parallel shield tunnel excavation on the adjacent tunnel. The influence of parallel shield tunneling is often analyzed by the finite element method (FEM). There is as yet no well-established method, however, of finite element analysis of large-cross-section shield tunnels, and actual tunnel behavior has not yet been elucidated, either. In this study, FEM is used for fitting to field measurement results in order to obtain basic data for establishing a design method for large-cross-section shield tunnels, whose construction is expected in the years to come.
