Stress changes induced by tunnel excavation and static pipe bursting inevitably lead to soil movements

and cause adverse effects on existing pipelines.Although the pipe-soil interaction has attracted increasing research attention worldwide

a simplified design code has not been developed to directly estimate bending strains of existing pipelines due to tunnel excavation and static pipe bursting.In this study

we use the commercial software of ABAQUS to systemically simulate the tunnel-soil-pipeline and pipe bursting-soil-pipeline interactions

and develop a single dimensionless plot for calculating bending strains of existing pipelines due to static pipe bursting and tunneling by using equivalent soil-pipe stiffness.Results of field monitoring and centrifuge tests are adopted to verify the proposed dimensionless plot.The ratio of the maximum pipeline curvature to the maximum ground curvature correlates well with the proposed equivalent subgrade soil stiffness.By given the ground displacement profile

pipe dimension

pipe material properties

and soil properties

engineers can apply the proposed dimensionless plot to directly estimate maximum pipeline curvature and/or strains due to tunneling and pipe bursting.