Abstract
Characteristics and mechanism of ground displacement during shield thrusting in soft ground were discussed. It is pointed out that the shield machine, auxiliary construction methods, backfill grout and the quality of operation control are the main influencing factors and should duly be taken into account for the prediction of ground displacement. The numerical calculation by two dimensional elastic finite element method with some modeling techniques was confirmed to provide an excellent method to predict the 3-dimensional ground displacement behavior under shield thrusting.
