Slope Stability Analysis Using Slice-Wise Factor of Safety

Slope Stability Analysis Using Slice-Wise Factor of Safety
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使用切片安全系数进行边坡稳定性分析

DOI:
10.1155/2014/712145
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发表时间:
2014-06
影响因子:
--
通讯作者:
Lu, Qing
Lu, Qing
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhao, Yu;Tong, Zhi-Yi;Lu, Qing

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引入了分条安全系数的概念,研究了边坡整体及各分条的安全状态。假设任意两条板间的力比相等,并考虑了板重的偏心力矩。然后,根据力和力矩的平衡关系和条间力的假设,建立了四元方程,进而得到了沿滑面沿着方向的安全系数。根据安全系数的分布,可以确定边坡的主动段和被动段。整个边坡的安全系数也被定义为抗滑力之和与滑动面上滑动力之和的比值。两个不同的滑动面形状的例子进行了分析,以证明所提出的方法的使用。条分安全系数使我们能够确定边坡的滑动机制和模式。通过与常规方法计算的总安全系数进行比较,验证了该方法的可靠性。
The concept of slice-wise factor of safety is introduced to investigate the state of both the whole slope and each slice. The assumption that the interslice force ratio is the same between any two slices is made and the eccentric moment of slice weight is also taken into account. Then four variables equations are formulated based on the equilibrium of forces and moment and the assumption of interslice forces, and then the slice-wise factor of safety along the slip surface can be obtained. The active and passive sections of the slope can be determined based on the distribution of factor of safety. The factor of safety of the whole slope is also defined as the ratio of the sum of antisliding force to the sum of sliding force on the slip surface. Two examples with different slip surface shapes are analysed to demonstrate the usage of the proposed method. The slice-wise factor of safety enables us to determine the sliding mechanism and pattern of a slope. The reliability is verified by comparing the overall factor of safety with that calculated by conventional methods.
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