基于敏感分析的反倾岩质边坡锚固参数优化设计

摘要

以湖北鹤峰红莲池反倾边坡为例，在分析边坡地质条件的基础上，通过离散元软件UDEC模拟试验，分析反倾岩质边坡的位移云图，得出了反倾边坡倾倒变形的破坏基准面，并以此初步确定锚索长度。基于敏感性分析方法，研究在不同锚固角、锚固力及锚索长度条件下，坡顶最大水平位移以及倾倒变形区面积变化特征，以此得到参数优化结果：锚固角为8°、锚固力为1000 kN、锚索锚固段长度为5 m。锚固参数敏感性大小排序依次为：锚固角度，锚固力，锚索长度。%Taking Honglianchi anti -dip rocky slope in Hefeng , Hubei for example , based on the geological conditions , we analyze the displacement nephogram of the slope by the Universal Distinct Element Code in 2-dunebsion(UDEC), then deter-mine the failure base plane of the slope , so the anchor cable length is confirmed preliminarily .Based on sensitivity analysis meth-od, we study the maximum horizontal displacement at slope crest and the variation of toppling deformation zone area under the conditions of different anchor angle ,anchoring force and anchor cable length .The parameter optimization results are follow: the optimal anchorage parameters are 8°anchorage angle, 1000kN anchoring force, 5m anchoring section length; the anchorage pa-rameter sensitivities are ordered by cable length