The preliminary analytical prediction of the ground deformation is an important subject in estimating the effects of the adjacent construction of shield tunnels. Through the statistical analysis of the data of ground settlement due to shield driving measured for different periods of the construction, the authors found out that the trends of ground settlement were on the decrease owing to the improvement of abilities of the shield machine. The study also showed that the numerical analysis by introducing the rate of stress release, which was determined on the basis of the rate of backfill grout, is applicabe to the predition of the ground deformation in the coming construction of shield tunnels.
