ABSTRACT
In this paper, the Pasternak foundation model is used to study the deformation law of the existing pipeline caused by shield construction. The two-stage method is used to establish the balance differential equation of the existing pipeline vertical deformation, and the finite difference method is used to derive the analytical solution of the pipeline deformation. The rationality and validity of the theoretical calculation are verified through the comparative analysis of theoretical calculation and field monitoring. The sensitivity analysis of parameters to the vertical deformation of the pipeline is carried out. Through parameter analysis, it is found that the buried depth and diameter of the pipeline have little influence on the vertical deformation of the pipeline. The formation loss rate has a significant effect on the maximum vertical deformation of the pipeline. As the formation loss rate increases, the vertical deformation and tangent slope of the pipeline increase significantly.
