抗滑桩应用于路基边坡时的受力影响因素研究

Seismic Analysis of Force Influence Factors of Anti Slide Pile on Subgrade Slope

路基边坡抗滑桩作为一种支档结构,对于预防路基滑坡具有重要作用。为研究合理的设计和布置抗滑桩,采用Abaqus有限元分析软件建立了数值仿真模型,分别对抗滑桩不同的桩径、抗滑桩嵌入稳定层深度及布设位置三大主要影响因素进行了探讨。研究结果表明,抗滑桩桩身的弯矩和剪力随着桩径的增加而不断的增加,滑坡安全系数随着桩径的增加在不断的增大。随着嵌固深度的增加,桩体承担的弯矩和剪力不断的增加,当增加至一定程度时不再变化,随着嵌固深度的增大,桩体的位移反应减小,至一定程度时,位移变化趋于稳定。抗滑桩布设位置的高低会对边坡治理效果产生明显的影响,应该综合施工场地条件和施工外加荷载综合设计。

As a retaining structure,anti slide of subgrade slope plays an important role in preventing subgrade landslide.In order to study the reasonable design or layout of anti slide piles,this paper uses ANSYS finite element analysis software to establish a numerical analysis model,respectively discusses the three main influencing factors of different pile diameter,anti slide pile embedded in the stable layer depth and layout position.The results show that the bending moment and foundation of anti slide pile increase with the increase of pile diameter,and the landslide safety factor increases with the increase of pile diameter.With the increase of the embedded depth,the bending moment and shear force of the pile increase continuously.When it increases to a certain extent,the bending moment and shear force do not change anymore.With the increase of the embedded depth,the displacement response of the pile decreases.To a certain extent,the displacement change tends to be stable.The location of anti slide piles will have a significant impact on the effect of slope treatment,so the comprehensive design of construction site conditions and construction load should be integrated.