凹边坡稳定性三维极限平衡法研究与应用

发布时间：2018-03-13 09:56

本文选题：凹边坡　切入点：三维极限平衡法　出处：《中国安全科学学报》2016年07期 　论文类型：期刊论文

【摘要】：为揭示拱形约束条件下凹边坡稳定性的三维效应,基于极限平衡理论,从定量认识土体环向侧压力角度出发,提出新的凹边坡稳定性三维计算方法。通过将该方法与经典三维极限平衡法进行对比,验证该方法的准确度。选取典型工程实例,采用该方法与数值模拟相结合,研究平面曲率对凹边坡空间滑坡模式与三维稳定性的影响。结果表明:该方法的精度较高;平面曲率对凹边坡的滑体空间形态、尺寸与稳定性有一定影响,即随平面曲率的减小,滑体走向长度与滑面深度均近线性增大,稳定系数呈指数型规律降低,工程中可通过增大凹边坡的平面曲率改善边坡稳定性和减小滑坡规模。
[Abstract]:In order to reveal the three-dimensional effect of the stability of concave slope under arch constraint condition, based on the theory of limit equilibrium, this paper starts from the angle of quantitative understanding of the circumferential lateral pressure of soil. A new three-dimensional calculation method for the stability of concave slope is proposed. The accuracy of the method is verified by comparing the method with the classical three-dimensional limit equilibrium method. A typical engineering example is selected and the method is combined with numerical simulation. The influence of plane curvature on the spatial landslide model and 3D stability of concave slope is studied. The results show that the accuracy of the method is high, and the plane curvature has certain influence on the shape, size and stability of the sliding body of the concave slope. That is, with the decrease of plane curvature, the direction length and depth of sliding surface increase linearly, and the stability coefficient decreases exponentially. In engineering, the slope stability can be improved by increasing the plane curvature of the concave slope and the landslide scale can be reduced.
【作者单位】：辽宁工程技术大学矿业学院;
【基金】：国家自然科学基金重点资助(U1361211);国家自然科学基金资助(51474119);国家自然科学基金青年基金资助(51104084) 辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助(LNTU15KF08)
【分类号】：TD80

【相似文献】