Study on the Influence of Anti-Slip Pile on the Mechanical Response of Pipeline Under Landslide

Abstract

In the process of laying anti-slip piles, by adjusting their number, spacing, shape, size and other parameters to analyze the changes of landslide morphology and pipeline stress under different working conditions, the reinforcement effect can be optimized and provide a basis for landslide control in actual engineering. Based on the strength reduction method, the finite element software ABAQUS was used to establish a numerical model of the sliding slope impact gas pipeline under the reinforcement effect of anti-slip pile, realize the pile-soil interaction analysis, and study the mechanical response of the gas pipeline under different reinforcement methods. The results show that when the number of anti-slip piles increases, the overall displacement of the sliding body decreases, and for the gas pipeline, the displacement decreases with the increase of the number of anti-slip piles, and the decrease range reaches 168.1mm, a year-on-year decrease of 35.89%, while the maximum effective stress of the pipeline increases first and then decreases with the increase of the number of anti-slip piles. When the size of the anti-slip pile increases, the maximum displacement of the sliding body gradually decreases, and the anti-slip effect of the soil directly above the slip pile and at the perimeter of the landslide slope is particularly obvious, indicating that the anti-slip pile size increases significantly to enhance its anti-slip effect on the slope. Although the construction of cylindrical anti-slip pile is smaller than that of square anti-slip pile, its anti-slip ability to resist slope is worse and its own anti-deformation ability is weaker.