ABSTRACT
In the construction of bored tunnels, one major concern is the ground deformation, which will inevitably take place. This paper describes the performance of a numerical method by appraising through back-analyses the ground surface settlement profiles of two case studies of bored tunnelling for Singapore Mass Rapid Transport. The results obtained by the numerical and empirical methods are also compared and discussed. For the two cases, the empirical method gave more conservative deformation estimates. The paper also presents some findings of parametric studies of the numerical model in assessing the effects of variations in the tunnel geometry and arrangement.
