曲率半径对均质圆弧型滑坡稳定性的影响

在采用条分法计算滑坡体稳定性时,条分数对计算结果影响很大,尤其是圆弧型滑坡。在圆弧型滑坡中曲率半径直接决定了滑坡体的实际形态,影响条块的划分。条块划分越密,计算的滑面形态越接近真实滑面,计算结果越精确。为探索曲率半径对滑坡体稳定性影响的规律,采用传递系数法对不同曲率半径的滑坡进行稳定性计算。结果表明,稳定性系数随曲率半径的增大而减小并逐渐趋于平缓。进而根据现行规范,提出了曲率半径与条分数的拟合公式,建立了统一的条分原则,有效提高了稳定性的计算速度与精度。

Influence of Curvature Radius on Stability of Homogeneous Circular Landslide

When using the strip method to calculate the stability of the landslide body, the number of strips has a great influence on the stability calculation results of the landslide, especially for the arc-shaped landslide. In the circular landslide, the radius of curvature directly determines the actual shape of the landslide body, which in turn affects the division of the slab. The denser the bar division, the closer the calculated slip surface shape is to the real slip surface, and the more accurate the calculation result. Therefore, in order to explore the law of the influence of radius of curvature on the stability of landslide body, this paper uses the improved transfer coefficient method to calculate the stability of landslides with different radius of curvature. The results show that the stability coefficient decreases and gradually becomes flat with the radius of curvature increases. According to the current norms, the fitting formula of radius of curvature with the number of strips is proposed, and a unified striping principle is established, which effectively improves the calculation speed and accuracy of stability.