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长期以来工程上采用二维方法分析边坡的稳定性。二维方法虽然计算简单,计算的结果与反算的结果也很接近,但二维方法不能考虑滑体两端的抗滑力,也不能确定滑体的空间形状,所以有必要用三维方法计算边坡的稳定性。 近10年来一些研究者提出了一些三维计算方法。文献[9,10]提出用一个圆柱面在两端各接1个旋转曲面构成空间滑面,但他们的方法不能确定滑体的临界长度,也不能算出确定的安全系数;文献[11]对三维极限平衡分析方法的静力分析作了探讨;文献[12]用变分法和极限平衡原理导出边坡破坏的2个模式,1个是通常的平面应变模式,另一个具有局部特征并要施加局部荷载。
For a long time, two-dimensional methods have been used in engineering to analyze the slope stability. Although the two-dimensional method is simple to calculate, the results of the calculation and the results of the back calculation are also close, but the two-dimensional method can not consider the sliding force at both ends of the sliding body, can not determine the spatial shape of the sliding body, so it is necessary to use three-dimensional method to calculate edge Slope stability. In the past 10 years, some researchers have proposed some three-dimensional calculation methods. The literature [9,10] proposes that a cylindrical surface is used to construct a space slip surface with one rotating surface at each end. However, their method cannot determine the critical length of the slippery body and can not calculate the certain safety factor. [11] The static analysis of the three-dimensional limit equilibrium analysis method is discussed. The literature [12] uses the variational method and the limit equilibrium principle to derive two modes of slope failure. One is the normal plane strain mode, and the other has local features. Apply local loads.