Square piles play a crucial role as load-bearing components in transmission tower foundations, impacting the safety of power line systems under complex loading conditions due to their superior lateral resistance performance. However, existing research has predominantly focused on circular piles, with limited systematic investigation into the lateral bearing mechanisms of square piles. This study utilizes finite element analysis to develop a comprehensive full-scale model incorporating pile-soil interactions and soil spatial effects. The study systematically analyzes the effects of pile side length and embedment ratio on load-displacement curves, horizontal ultimate stage, and overturning rotation center. The results indicate that (1) Base on load-displacement curve evolution, plastic strain distribution and experimental specifications, under horizontal ultimate state in sandy soil, the critical displacement threshold at the pile head of square piles is 10 mm. (2) An increase in ultimate lateral bearing capacity by a factor of 2.4 with the square pile side length increasing from 1.2 m to 2.0 m, and an increase in bearing capacity by 0.9 times with the embedment ratio rising from 1.0 to 2.0. (3) The overturning rotation center is located at the bottom central axis position of the square pile. (4) Under horizontal ultimate loading conditions, square piles induce lateral earth pressure in sandy soil that follows a parabolic distribution along the embedding depth, with peak stress occurring at 0.5 times the pile's embedding depth below the soil surface. The results provide theoretical and practical references for optimizing the seismic and disaster-resistant design of transmission infrastructure.
Discussion(0)
No comments yet. Be the first to comment.