Abstract: Due to the large deformation of soil and the large difference in the stiffness of pipe and soil, the separation of the overlying pipes and surrounding soils are widely observed during the construction of shallow buried tunnels. Proposing a method for solving the soil release zone of overlying pipeline induced by shallow buried tunnel excavation based on the analysis of pipeline deformation. The Gaussian curve distribution is used to simulate the soil deformation. Based on the nonlinear Pasternak foundation correction model, which can consider the continuity and non-linearity of the foundation, the differential governing equations of the coordination zone and the detachment zone of the pipe-soil under shallow buried tunnel construction are established, respectively. The numerical solutions of the vertical deformation of the overlying pipeline induced by tunnel excavation are obtained using the finite difference method and the Newton iteration method. According to the displacement difference of pipe-soil, the size of the release zone is solved iteratively. The relative stiffness parameter R of pipe soil, which can comprehensively consider pipe stiffness and soil strength, and detachment load ratio parameter T_g, which comprehensively considers soil load characteristics, are proposed as the judgment parameter of detachment of pipe soil. The proposed method was verified using the monitoring data of engineering cases and the existing model test data. The comparative analysis of the normalized vertical displacement of pipeline shows that there are critical relative stiffness of pipe-soil and critical and detachment load ratio parameters. When R is greater than the critical relative stiffness or T_g is less than the critical load ratio, the detachment effect of pipe-soil should be considered in the calculation of pipeline deformation. This conclusion can be used as reference for engineering design.