锚杆作用下边坡稳定分析中改进最小势能法研究

发布时间：2018-04-24 18:19

本文选题：锚杆 + 边坡　；参考：《岩土力学》2017年S1期

【摘要】：为分析锚杆作用下边坡的稳定性,基于最小势能原理,通过单元体虚位移方向的静力平衡方程确定滑面剪应力分布的解析解,构建剪切势能计算模型。在建立边坡支护系统的势能函数时考虑锚杆储存的线应变能以及弯曲应变能,提出改进的最小势能锚杆支护边坡稳定性分析方法。通过算例将其与传统算法进行对比,分析了锚杆参数对边坡安全系数的影响。研究表明,文中的计算方法可行且合理,锚杆的弯曲应变能对边坡的安全系数计算结果的影响可忽略不计;锚杆的竖向间距、长度、锚固角、锚固力以及第一排锚杆距离地面的距离对边坡的安全系数影响较为显著,锚杆的刚度对边坡安全系数的影响水平较低;随着锚杆长度的增加,边坡的安全系数曲线呈现先递增后趋于稳定的变化规律;锚固角度为?22左右时边坡的安全系数存在最优值。
[Abstract]:In order to analyze the stability of slope under the action of anchor rod, based on the principle of minimum potential energy, the analytical solution of shear stress distribution of sliding surface is determined by the static equilibrium equation in the direction of virtual displacement of unit body, and the shear potential energy calculation model is constructed. When the potential energy function of slope support system is established, the linear strain energy and bending strain energy stored by anchor rod are taken into account, and an improved method for slope stability analysis with minimum potential energy is proposed. The influence of anchor parameters on slope safety factor is analyzed by comparing it with the traditional algorithm. The results show that the calculation method in this paper is feasible and reasonable, the influence of bending strain energy of anchor rod on the safety factor of slope can be neglected, the vertical spacing, length, anchoring angle of anchor rod can be ignored. The anchoring force and the distance between the first row and the ground have a significant effect on the safety factor of the slope, while the stiffness of the anchor rod has a lower influence on the safety factor of the slope, and with the increase of the length of the anchor rod, The safety coefficient curve of slope increases first and then tends to stable, and the slope safety factor has the best value when the anchoring angle is about 22 or so.
【作者单位】：江西工业工程职业技术学院采矿与建筑工程系;江西理工大学建筑与测绘工程学院;清远市建设工程质量监测站;
【分类号】：TU43

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