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利用拉格朗日差分计算方法建立节理岩体边坡的数值分析模型,分析节理面充填厚度以及锚杆支护参数对边坡稳定性的影响,得到:(1)节理充填物厚度对于边坡稳定性的影响不大。边坡上部岩土体主要发生拉伸破坏,而在节理面上主要发生剪切滑移破坏。(2)边坡的安全系数随锚杆长度的增加而非线性增大。当锚杆长度达到一定值后,边坡的安全系数将不发生变化。当锚杆长度增大时,边坡的塑性破坏区域不断增大,并且塑性区从坡脚处往坡顶发展。(3)边坡安全系数F随锚杆倾角θ的增大呈现先增大后减小的形式。边坡的安全系数F随锚杆间距S的增大而非线性减小。
The numerical analysis model of jointed rock mass slope is established by using Lagrange differential method. The influence of the thickness of jointed joint filling and the bolt supporting parameters on the slope stability is analyzed. The results are as follows: (1) Little effect on stability. Rock and soil in the upper part of the slope mainly suffered tensile failure, while shear and slip damage occurred mainly in the joint surface. (2) The slope safety factor increases non-linearly with the increase of bolt length. When the bolt length reaches a certain value, the slope safety factor will not change. When the bolt length increases, the plastic failure area of the slope increases continuously, and the plastic zone develops from the slope foot to the top of the slope. (3) The slope safety factor F assumes the form of first increasing and then decreasing with the increase of the inclination θ of the anchor. The slope safety factor F decreases nonlinearly with the increase of anchor spacing S.