Urban underground engineering construction may have bad influence on the environment and even cause disasters. Pipe-roof Pre-construction Method(PPM) had been used in building a metro station of line No.2 of Shenyang subway. It's very important to analyze and evaluate the deformation of the environment in order to ensure the safety of constructing procedure. So, based on the detailed study of geological conditions and PPM, Flac3D software combined with field monitoring data in stations earthwork phase is used. And then, research on the surface ...
