Research on treatment scheme of soil landslide in aviation oil pipeline based on oil-pipeline-soil multi-physical field coupling and anti-sliding simulation

By a coupled smoothed-particle hydrodynamics–finite element method (SPH-FEM), an oil–pipeline–soil multi-physics coupling model of an oil pipeline under the action of a landslide was established. The pipeline where internal pressure alone was considered and the pipeline when filled with oil exhibited typical damage behaviour of a pipeline under a landslide. When the pipeline was full of oil, the oil had a greater effect on the displacement and deformation of the pipeline. SPH-FEM models of load reduction, slide-resistant piles and a retaining wall were established. The limit state stress and displacement of the pipeline under these three anti-slide measures were compared. Load reduction and slide-resistant piles could prevent landslides, but the stress on the pipeline finally exceeded the limit state stress. When a retaining wall was laid in front of the pipeline, the pipeline was safe. The anti-slide scheme based on the retaining wall was therefore feasible. •A coupling model considering pipeline-soil-oil interaction is established.•The pipeline is full of oil, and the damage of landslide is intensified.•The retaining wall has the most significant effect on pipeline protection.