Abstract:Based on the material point method (MPM), numerical simulations were conducted to investigate the interaction between slopes and buried pipes. The effects of factors such as pipe diameter, pipe material, foundation width, and foundation position were systematically analyzed, and the effects of pipe stress conditions on pipe deformation patterns and slope failure mechanisms were examined. The results showed that pipe diameter, pipe material, foundation width, and foundation position not only affected the ultimate bearing capacity of the slope but also changed the propagation path of shear bands in the slope. Pipe diameter and pipe material had significant effects on slope bearing capacity and shear band development. Larger pipe diameters and pipe materials with lower stiffness both reduced the foundation bearing capacity of the slope. Foundation width and position controlled the formation path of slip surfaces within the slope. Pipe deformation mode was controlled by the bending moment distribution around the pipe. An increase in negative bending moment directly caused the pipe deformation to transition from an elliptical to a heart-shaped pattern. The pipe-soil interface provided a potential instability path, accelerating the development of slip surfaces in the slope. These findings provide important references for deformation control and structural design of slope-pipe systems.
