As transmission lines extend into mountainous regions, engineering practices must address the challenging geological conditions of soil-over-weathered-rock strata and the complex loads imposed by extreme climates. This study introduces a novel perimeter anchor pier composite foundation designed specifically for soil-weathered rock strata, aimed at optimizing the mechanical performance of piles and anchors. Initially, material pretests were conducted to determine the appropriate proportions and mechanical properties for scaled models. Subsequently, tension-compression-bending loading tests were performed to investigate the deformation and failure patterns of the novel foundation. Finally, by analyzing the deformation and failure characteristics of the piles and test data, load-displacement-failure curves for the composite structure were derived. The results show that under compression-bending loads, cracks penetrate the pier, causing splitting failure of the pier body and shearing failure of the short piles at the base. Under tension-bending loads, the base short piles experience tensile rupture without damaging the rock mass, while the anchor undergoes significant deformation. The study also reveals that the load-bearing capacity of the base rock mass is not fully utilized, and it recommends enhancing pile strength to improve the overall bearing capacity of the perimeter anchor pier composite foundation.

来源平台：ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING