A new strategy for monitoring of adjacent structures to tunnel construction in urban area

摘要

A number of urban tunnel constructions take place as the social demand for public transportation increases, in which the major concerns would be not only for safety of tunnels itself but also for safety of adjacent structures to the tunnels. The safety of the adjacent structures is subject to ground movements due to tunnelling. In general, a prediction of ground movements and potential damages of the adjacent structures are carried out, in which a number of damage parameters such as angular distortion, deflection ratio, etc. are involved. Monitoring on the adjacent structures is also undertaken for evaluating their damage during tunnel construction. The number of monitoring points might be limited because of economical reason, etc., at which ground settlements and tilts would be monitored periodically.