The deep metro excavation will lead to the deformation of adjacent pipelines. Knowing the influence of excavation construction on pipelines has significant meanings for controlling the deformation of pipelines effectively and reducing construction risks. Based on the actual measurement data of some excavation of Xiamen line 1

parametric analysis is applied to the influence of excavation on adjacent pipelines by using the finite element method with the consideration of soil small strain stiffness characteristics. The influential zone of adjacent pipelines is divided combined with control standards on deformation. The study shows that burial depth of pipelines

compared to the horizontal distance of which from excavation

has a larger influence to the maximum settlement of pipelines. The maximum deformation of pipelines has considerable correlation to stratum deformation outside the excavation. The stiffness between pipeline and soil has limited restrictions to the soil displacement. The axial force will increase as the horizon distance from excavation declines. The larger axis stiffness and sectional area are

the bigger the axial force is. With overall consideration of pipelines horizontal distance

burial depth and other factors

the influence of excavation on adjacent pipelines can be divided into main influence area(Ⅰ)

minor influence area(Ⅱ)

general influence area(Ⅲ) and weak influence area(Ⅳ).