Analysis of field measurement data on responses of metro tunnel due to substructure construction

The movement and deformation of tunnel, which influence directly serviceability of tunnel and even endanger the safety of metro, may be caused by the changes of stress condition of ground around metro tunnel owing to the construction of substructure. A case history was presented in which the construction of substructure was done around the twin tunnels of No.1 route of Shanghai metro. Based on the data of field measurement, the responses of metro tunnels due to the construction of cast-in-place concrete pile/diaphragm wall, deep foundation pit and shallow foundation pit are analyzed concretely, respectively. It is known that responses of tunnel due to every construction condition mentioned above are different.