Bedding slope is one of the most common forms of landslides, and determining the shear strength parameters of the sliding surface is essential for the slope stability analysis and engineering design. Due to the different values of shear strength parameters of different sliding surfaces and the existence of the interlayer shear effect during sliding, it is difficult to determine the shear strength parameters of the bedding slope with the multi-layer sliding surface, especially when the multi-layer sliding mass slides at different speeds at the same time. Therefore, the back analysis method combined with the upper-bound limit analysis method with reliability theory is proposed to back-analyze the shear strength parameters of the multi-layer sliding surface simultaneously. By analyzing three practical landslides in detail, the feasibility and applicability of the proposed method are validated. This method enables one to incorporate the effects of uncertainty and randomness of the parameters, and consider the interlayer shear effect, thus obtaining the most likely shear strength parameter combination and providing a reference for the strength parameter back analysis of bedding slopes based on the reliability theory.

顺层边坡是最常见的滑坡形式之一，确定滑动面的抗剪强度参数对于边坡稳定性分析和工程设计至关重要。由于不同滑动面的抗剪强度参数取值不同，且在滑动过程中存在层间剪切效应，因此很难确定具有多层滑动面的顺层边坡的抗剪强度参数，尤其是当多层滑动面层滑动块同时以不同的速度滑动。为此，提出了结合可靠性理论的上限分析方法的反分析方法，同时对多层滑动面的抗剪强度参数进行反分析。通过对三个实际滑坡的详细分析，验证了所提出方法的可行性和适用性。该方法可以综合考虑参数的不确定性和随机性的影响，考虑层间剪切效应，从而得到最可能的抗剪强度参数组合，为基于可靠度理论的顺层边坡强度参数反分析提供参考。 .