Study on Load-sharing Pattern of Anti-slide Piles Control for Landslides with Pipeline Crossing

摘要

Long distance natural gas transmission pipelines were designed to cross the western mountain area,where safety depends on the stability of related landslides.Anti-slide piles are among the most effective reinforcement measures in the field of landslide improvement.The paper presents a load-sharing pattern study of anti-slide piles reinforcement against landslide with pipeline crossing.Based on the case study of typical landslide and natural gas transmission pipeline,the mechanical model of landslide and pipeline was performed,from which the mechanical analysis on deformation of the pipeline is carried out.By using the numerical modeling method,the load-sharing pattern of anti-slide piles,sliding mass and pipeline was analyzed in detailed.The result shows that there is clearly destructive stress concentration occurring at the back part of the pipeline,and the setting of the anti-slide piles can drastically reduce the load-sharing ratio of the pipeline.That is the reason why the anti-slide piles can provide protection of the pipeline in the aspects of stress and deformation.The proper setting of anti-slide piles can improve the state of stress on the pipelines,which is the crucial explanation for the reinforcement mechanism of anti-slide piles.