Stress Calculation Method Designed of Pipeline in Landslide Section Based on SBAS-Insar and Finite Element Method

The permanent ground displacement of geological disasters is the main reason inducing large additional axial stress pipelines. This paper presents a surface measurement method above pipeline based on SBAS-InSAR remote sensing technology, which realizes millimeter-level high-precision monitoring in kilometer range. Based spatial coordinate data center line and geometric feature pipeline, combined with cubic spline interpolation algorithm, reconstruction three-dimensional space routing proposed. Considering real process load conditions such as temperature pressure, finite element model analysis established by using pipe nonlinear soil element. Taking landslide accurate boundary condition, calculation section practice high-risk Liangxiang-Xishatun Shaanxi-Beijing Pipeline from 2021 to 2022 shows that maximum relative error between results obtained this distributed strain gauge does not exceed 16%, can effectively realize safety evaluation state section, provide technical basis for establishment digital twins future disaster sections.