铰接支撑型抗滑桩加固边坡稳定性分析

Analysis of the Stability of the Reinforced Sloped by Hinged Supporting Anti-slide Pile

抗滑桩在边坡加固工程中应用广泛且效果显著,但抗滑单桩在边坡推力较大时支护能力稍显不足.为此提出一种铰接支撑抗滑桩模型,通过在桩背设置铰接钢支撑对抗滑桩主体进行加固,并在其计算模型基础上,采用显式有限差分方法研究铰接支撑型抗滑桩在加固边坡后对边坡稳定性的影响及提升作用.结果表明,抗滑桩加支撑时桩体受到弯矩较大,位移较大,桩体能够承受更大抗滑阻力及变形;铰接支撑型抗滑桩可使边坡稳定性提升,但提升效果受设桩位置影响,抗滑桩主体布置在边坡中部时效果最佳,边坡安全系数最大,越靠近坡顶或坡脚安全系数越小.对该抗滑桩分析可为边坡支护的实际应用提供指导.

Anti-slip pile is widely used and has significant effect in slope reinforcement engineering,but the supporting ability of anti-slip single pile is slightly inadequate when the thrust on the slope is large.In this paper,a hinge supported anti-slip pile model was proposed,which could reinforce the pile body by setting the hinge support on the back of the pile.On the basis of this model,the influence and improving effect of hinge supported anti-slip pile on slope stability were studied by using the explicit finite difference method.The results showed that when the antislip pile was supported,the pile body was subjected to larger bending moment and displacement,and the pile body could withstand greater anti-slip resistance and deformation.Slope stability could be improved by hinge supported anti-slip pile,but the effect was affected by the position of the pile.When the pile body was arranged in the middle of the slope,the effect was the best and the safety factor of slope was the largest.While the safety factor got lower when the pile body was closer to the top or the bottom of the slope.The analysis of the anti-slide pile can provide some guidance for the practical application of slope support.