Abstract：Earth pressure balance(EPB) shield construction often has soil-compacting effects on its surrounding soil. It results in the surface upheaval and moving away of deep soil from the tunnels. The soil is assumed to be a kind of uniform linear-elastic material and the initial stress field of the soil is considered. Through the simulation of soil-compacting process by applying an outward elliptic radial displacement to the surrounding soil of shield，the approximately analytical solutions of soil displacement fields in half space are obtained in small strains. Considering the spatial effects，the modified calculation formula is presented. Also，the analysis of computation for a case by proposed formula is made. It shows that excessive support pressure，deflexion of shield，the friction between shield and soil，and the grout pressure will induce the compacting effects. The maximum surface upheaval is at both sides of axes. In addition，the heaving process will reduce the total magnitude and width of the ground surface settlement troughs after the construction being completed. The calculated results here are in accordance with the measured ones.
