3D Numerical Simulation Analysis on Ground Surface Settlement Caused by Urban Subway Shield Construction

Abstract

Analysis of ground surface settlement has been an important technical problem in urban subway shield construction process, but it’s difficult to forecast and calculate settlement accurately. This paper analyzes main causes of surface settlement caused by shield construction, summarizes the influence of several important parameters to surface settlement and then Midas GTS software was used to simulate shield construction process and calculate ground surface settlement, to calculate stress, strain and displacement of overlying strata above the shield driving machine, obtains calculated values of surface settlement which compared with field measured values. Practice has proved that this 3D numerical simulation method is in accordance with fact, it provides a useful reference for subway shield construction project.