Effect of Anchor Angle on the Stability of Slope Reinforced by Pile-anchor Structure Under Seismic Load

Pile–anchor reinforcement is among the most popular and efficient slope-reinforcement techniques. However, little is known about the behavior of pile–anchor structures under the influence of seismic loads used for slope reinforcement. Therefore, it is crucial to evaluate reinforcement performance under seismic loads. This paper presents the numerical response of a slope strengthened by a pile–anchor structure system with different anchor angles. The best reinforcement angle is determined based on the control of slope displacements at various points and the safety factor of slopes under different conditions. A maximum safety factor of 1.179 and minimum displacement of 0.654 m occurred with an anchor angle of 15°. The study results showed that the pile–anchor reinforcement with an anchor angle of 15° performed best for slope stability.