Combination of analytic and numerical methods applied in tunnel construction process

In order to research the mutual influence of tunneling and environment, the analytic method is combined with the numerical method and a semi analytical function is produced for the double tube parallel tunnels construction with both single and multiple connected regions. Therefore, the three dimensional time and space mutual influence process of tunnels excavation can be simulated. This paper has also simulated the construction case of two shield driving in the same direction at last. The purpose of this paper is to provide a theoretical basis for shield construction.