Abstract: When a tunnel is crossing under a group of existing buildings, it is necessary to predict its potential impact on the buildings and to control the possible hazard induced by the tunnel. The conventional prediction methods include: theoretical approach, numerical analysis and empirical solution. This paper reviews both advantages and disadvantages of these methods. Their practical applications and their reliabilities have also been presented in the paper.

Key words: Tunnel Undercrossing, Existing Buildings, Control Criteria, Analytical Methods, Monitoring and Measurement, Destruction