Due to the development of joints, wedge failure has become the main failure type of rock slopes. Obtaining accurate parameters is an important prerequisite in studying slope stability. However, these are difficult to obtain due to the restrictions of field conditions. Based on a real and simple wedge, the method of stability analysis and parameter acquisition of a wedge with the nonlinear Barton-Bandis failure criterion is discussed, and then this method is extended to the conventional form of a wedge. With minimal available data, a simple field test and the reliability back analysis method are combined to propose a specific method for determining the most likely combination of nonlinear strength parameters when wedge failure occurs. This approach can provide a simple and practical method for determining the nonlinear strength parameters for engineering applications. Thus, the small frequent collapse incidences in jointed rock slopes can be effectively utilized to provide a reference for the prevention and control of large-scale failure.

由于节理的发育，楔形破坏已成为岩质边坡的主要破坏类型。获取准确的参数是研究边坡稳定性的重要前提。然而，由于现场条件的限制，这些很难获得。基于一个真实简单的楔子，讨论了基于非线性Barton-Bandis破坏准则的楔子的稳定性分析和参数获取方法，然后将该方法推广到楔子的常规形式。以最少的可用数据，结合简单的现场测试和可靠性反分析方法，提出了一种特定的方法，用于确定发生楔形破坏时最可能的非线性强度参数组合。该方法可为工程应用中确定非线性强度参数提供一种简单实用的方法。因此，可以有效利用节理岩质边坡小而频繁的崩塌发生率，为大规模破坏的预防和控制提供参考。