Abstract：When the environmental protection levels of building foundation pit in both sides are not symmetry，the metro station design will usually carry on a higher environmental protection level. Thus，it will increase the engineering construction cost imperceptibly. To solve the such a problem as for deep foundation pit of metro station on both sides with different environmental protection levels，the structure design idea is discussed to control asymmetric deformation of the excavation of deep foundation pit. The design method is proposed to realize the deep excavation with asymmetrical distortion；and two calculation modes，i.e. the overall load structure model and separation load structure model，are proposed to simulate the asymmetric deformation in deep excavation. Furthermore，the computational model is provided with related parameters. In view of the engineering characteristics of the deep foundation pit of People¢s Square Station of Shanghai Metro No.8，the deformation is calculated under different environmental protection levels for deep foundation pit with separation structure load model；and the monitored results are verified for the rationality of operation metro station. The result shows that for different environmental protection levels，asymmetric excavation design method is reasonable and can be used to simulate and predict the deformation of foundation pit construction on near-field parallel operation metro station.
