Response Analysis of Buried Pipeline Subjected to Reverse Fault Displacement in Rock Stratum

Response analysis of the buried pipeline subjected to reverse fault displacement is very important for design, detection and protection of buried pipelines. This paper looks at the buckling behavior of a buried pipeline subjected to reverse fault displacement in the rock stratum. Effects of internal pressure, wall thickness, fault displacement and burial depth on the buckling mode and the axial strain of the buried pipeline are discussed. The results show that there are two buckling locations on the buried pipeline subjected to reverse fault displacement in the rock stratum and that the buckling modes of the buried pipes with different internal pressures are different. The two buckling locations are not symmetrically distributed along the fault plane. The buckling mode ranges from collapse to wrinkle as the internal pressure increases. The buckling phenomenon becomes more serious as the fault displacement increases, and the shape of the deformation curve changes from the S-shape to the Z-shape. The process of pipeline deformation can be divided into three stages. There is no buckling in the first stage. The second stage is a transition stage, buckling appears on the buried pipeline. Buckling is more serious in the third stage. Fault displacement has a small effect on the maximum strain position of the buried pipeline. The deformation curve of the buried pipeline is smoother as the wall thickness increases. The maximum axial strain of pressure pipes first increases and then decreases as the wall thickness increases.