抗滑桩加固高边坡受力特征影响因素分析

Analysis on Factors Influencing Mechanics Characteristics of High Slope Reinforced by Anti-slide Piles

抗滑桩是一种常见的高边坡支挡措施,为研究影响抗滑桩的受力性能的主要因素,基于ABAQUS数值模拟研究了桩径、桩体嵌固段长度和桩位对桩内力分布影响。结果表明:(1)桩身弯矩和剪力与桩径呈正相关关系且抗滑桩能够显著提高边坡的稳定性,增大桩的直径更有利于边坡的稳定性;(2)抗滑桩的嵌固段深度对桩的内力分布也会产生影响。具体来看,嵌固段越长,桩身内力越大,但增大嵌固段长度可以有效减小桩顶位移;(3)桩布设位置对于桩身的内力影响表现为桩位越靠近坡趾,桩的内力以及桩顶位移越小。因此在抗滑桩设计时,要综合考虑桩的受力和桩的位移。研究结果为高边坡工程治理提供了有益的参考。

Anti-slide pile is a kind of common retaining measure for high slope.In order to study the main factors affecting the force performance of anti-slide pile,based on Abaqus numerical simulation,the influence of pile diameter,pile length of embedded segment and pile position on the distribution of internal force of pile is studied.The results show that(1)the pile bending moment and shear force are positively correlated with pile diameter.And the anti-slide pile can significantly improve the stability of high slope,and increasing the diameter of pile is more beneficial to the stability of slope.(2)The embedded depth of anti-slide pile also has an effect on the distribution of internal force of pile.In particular,the longer the embedded section is,the greater the internal force of the pile is,but increasing the length of the embedded section can effectively reduce the displacement of the pile top.(3)The influence of pile location on the internal force of the pile shows that the closer the pile is to the toe of the slope,the smaller the internal force of the pile and the displacement of the pile top.Therefore,when the anti-slide pile is designed,the pile force and the pile displacement should be considered comprehensively.The research results provide a useful reference for the engineering treatment of high slope.