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为了研究平直和水平凹形边坡稳定性差异的内部机理,以简支梁结构和两铰拱结构为基础模型,建立了平直和水平凹形边坡的整体力学模型,推导出端帮结构中的轴力、剪力和弯矩等基本力学参数计算公式,揭示了整体力学结构差异对稳定性的影响关系。通过建立边坡分析的三维模型,研究了平直与水平凹形边坡对稳定性的影响,结果表明:水平凹形边坡的曲面拱形结构能够有效缓解剪应力的集中分布,降低边坡失稳的风险,其稳定性优于平直边坡;内排跟进缩小坑底宽度能够有效提高端帮边坡稳定性;平直和水平凹形边坡稳定性随边坡角的增大均呈现线性递减;随着边坡高度的增加,水平凹形边坡相比平直边坡稳定系数增加的幅度逐步减小。
In order to study the internal mechanism of the stability difference between straight and horizontal concave slopes, the integral mechanical model of straight and horizontal concave slopes is established based on simply supported beam structure and two-hinge arch structure. The calculation formulas of basic mechanics parameters such as axial force, shear force and moment in the structure reveal the relationship between the overall mechanical structure and the stability. Through the establishment of three-dimensional model of slope analysis, the stability of straight and horizontal concave slope is studied. The results show that the arched structure of horizontal concave slope can effectively alleviate the concentrated distribution of shear stress and reduce the slope The risk of instability is better than that of straight slope; the inner row of narrowing bottom width can effectively improve the stability of end slope; the stability of straight and horizontal concave slope increases with the increase of slope angle Linear decrease. With the increase of slope height, the stability coefficient of horizontal concave slope increases gradually compared with straight slope.