仰斜式锚杆布置形式对边坡加固效果模型试验分析研究

Model experimental analysis of the effect of inclined anchor rod arrangement on slope reinforcement

目前,在边坡加固过程中,多数采用俯斜式锚杆的布置方式,当边坡产生一定位移后俯斜式锚杆主要承受的是剪应力,轴力与剪应力的比值很小,锚杆的抗拉性能没有充分地发挥出来,抗力不足致使坡体变形位移过大。在此种背景下,为充分发挥锚杆抗拉性能,本文设计了小尺寸边坡锚固模型,对比研究了坡顶竖向荷载作用下俯斜式和仰斜式锚杆布置形式对边坡承载性能和变形的影响。试验结果表明:与俯斜式锚杆布置形式相比,仰斜式锚杆布置形式能充分发挥锚杆的抗拉性能,较好地降低坡顶的竖向位移。

Currently,during the slope reinforcement process,the majority of arrangements use inclined anchor rods.When the slope undergoes a certain displacement,the inclined anchor rods primarily bear shear stress,with a very small ratio of axial force to shear stress,which results in insufficient utilization of the anchor rods'tensile strength,leading to excessive deformation of the slope.In this context,to fully utilize the tensile performance of anchor rods,this study designs a small-scale slope anchoring model to compare the effects of inclined and vertically inclined anchor arrangements on the bearing capacity and deformation of the slope under vertical loads at the slope crest.The experimental results indicate that,compared to inclined anchor arrangements,vertically inclined anchor arrangements can better utilize the tensile performance of the anchor rods and effectively reduce the vertical displacement at the slope crest.