On construction supervision of deep foundation pit of shield well of subway station and its engineering application

Taking the deep foundation pit of shielding starting well section of Xiangjiang north road station of 15th line for Beijing subway as the background,the paper illustrates the ways of how to direct the excavation and support with some supervision data according to the level deformation and support axial force of the enclosure structure of the deep foundation pit,so as to ensure the safety of the foundation pit.