Abstract:The surrounding environment of long-distance oil-transporting pipeline is complex and disasters occur frequently. Landslides pose a great threat to the long-term safe operation of buried steel pipelines. Therefore, it is extremely important to research the mechanical properties of buried steel pipelines. Based on transverse distribution model of Winkler Beam model of elastic foundation and landslide thrust while in the consideration of the function of equivalent axial force which is aroused by temperature difference, internal pressure and thrust factors, a simplified mechanical model of stress and deformation of buried pipeline under lateral landslide is built. According to symmetry conditions, boundary conditions, and deformation compatibility conditions of pipeline and landslide external pipeline in landslide, the differential equation of pipeline deformation and computational expressions of pipe deflection, angle, bending moment and shear force can be solved. The algorithm is used to evaluate the safety of the engineering case. Based on the ABAQUS software, the numerical simulation of the pipeline stress is carried out. The results of the two methods are basically the same. The results show that under the action of lateral landslide, the pipeline stress at the boundary of the landslide is the largest, the most likely to occur, and the deformation of the pipeline in the middle of the landslide is the largest.