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用一维稳态随机场模拟了土坡不排水强度的空间变异特性,将随机场中的生成样本视为土坡强度输入参数的确定值,然后利用极限平衡分析方法与强度折减法分别进行了土坡确定性分析,并进行了安全系数与失稳模式的对比.通过30个样本结果的汇总与对比分析发现,简化Bishop法得到的安全系数与有限元强度折减法以及有限差分强度折减法所得结果一致,而基于Morgenstern-Price方法计算的安全系数与强度折减方法得到的安全系数有明显区别.在失稳模式方面,极限平衡方法无法模拟可能会出现的多重滑动面,而有限元以及有限差分强度折减方法却能很好地描述土坡的多种失稳模式.
The one-dimensional steady-state random field is used to simulate the spatial variability of undrained soil strength. The generated samples in random fields are regarded as the input values of soil slope strength. Then, using the method of limit equilibrium analysis and intensity reduction method, Comparing the safety factor and the instability model, the comparisons between the safety factor and the instability model are carried out.According to the comparisons and comparisons of the 30 samples, it is found that the safety factor and finite element strength reduction method obtained by the simplified Bishop method and the finite difference strength reduction method And the results are consistent, while the safety factor calculated by Morgenstern-Price method is significantly different from the safety factor obtained by the strength reduction method.Under the instability mode, the limit equilibrium method can not simulate the multiple sliding surfaces that may appear, while the finite element and the finite element The method of differential strength reduction can well describe various failure modes of the slope.