Abstract：The main issue considered both in design and construction in urban environments is constrolling ground movement to keep the safety of existing buildings. Based on a shield tunnel construction in Shanghai，the ground displacement distribution around tunnel is studied by field measurement and numerical analysis. It is shown that the influence of shield excavation on soils around tunnel can be divided into three stages，including shield approaching，crossing and leaving the measuring holes. While the shield approaches and crosses the measuring holes，the ground movements of lateral soil behave heaving，moving along the shield tunneling direction and outward the tunnel. Settlement，moving along the shield tunneling direction and inside the tunnel are main deformation characteristics when the shield leaves the measuring holes. Settlement and forward movement the soils above tunnel because of the large buried depth. According to the calculated layered settlement above tunnel，modified Peck formula used to predict the settlement of deep soils is established；and the results are compared with those of simulation.
