Abstract: In order to control the deformation of the adjacent shield tunnel caused by the excavation of the foundation pit in the neighboring zones, the monitoring data of foundation pit zones and their adjacent metro tunnel are analyzed to elucidate the influence of the law of foundation pit zoning excavation on the deformation of adjacent metro tunnel. Moreover, the effect of the foundation pit excavation on the adjacent tunnel is analyzed, and the connection between the pit deformation and the deformation of the adjacent tunnel is explored. The results reveal the following: (1) The shield tunnel′s longitudinal deformation growth is greater during the pit structure′s construction phase than during the pit′s excavation phase; the increased horizontal displacement during the construction of the structure is approximately three times the excavation phase. (2) There is a lag of approximately 60 days between the pit sidewalls′ development and the adjacent tunnel′s longitudinal deformation. However, the horizontal convergence of the tunnel has good consistency with the deformation law of the sidewall of the foundation pit.

Key words: foundation pit excavation, adjacent shield tunnel, multidivisional excavation, measurement analysis of deformation