Closely constructed excavations will influence the stress and deformation of adjacent existing underground structures. In this paper, the nonlinear numerical analysis of plane finite element was applied to predict the movement of a construction of foundation pit in Shanghai to verify its applicability. Parametric studies were performed to investigate the influence of width of pits and the distance of the two pits on deformation of soil between two excavations. The relationship of optimal distance between excavations and the width of excavations was derived. The influence of the distance between the tunnel and the excavation on the deformation of tunnel was also analyzed. The results show that the settlement of shield tunnel is less than that of its neighboring soil. The shallow tunnel heaves during the excavation. The amount of heave is reduced for the tunnel more distant away from the excavation.