The foundation pit between Pujiang and Yaohua stations of the metro line 7 in Shanghai is located above the metro tunnels.And the minimum distance between the foundation pit bottom and the tunnel top is just 9 meters.The key to the foundation pit project is the analysis and calculation of the effect on the deformation of the metro tunnels caused by the excavation of the foundation pit.A numerical model of the foundation pit project was established.The model simulated the practical construction process and t...