Within the framework of limit analysis, the seismic stability of reinforced 3D slope in unsaturated soils is investigated, and the effects of nonhomogeneous and anisotropic soils are considered. In geotechnical engineering, reinforcement is commonly used to improve slope stability. Due to complex geological processes, soils are nonhomogeneous and anisotropic. Because of matric suction, the unsaturated property is considered in engineering. Using the analytical approach, a set of formula is proposed, which can evaluate the seismic stability of reinforced 3D slope in unsaturated soils. This work uses a pseudo-dynamic approach to consider the earthquake action, solves the work rates at two levels of time and space, and finally adopts a layer-wise summation means to get the outcomes done by seismic force. According to the energy balance relationship, analytical expressions are obtained in this study for the required reinforcement strength. The sensitivity analysis is conducted on some parameters, such as reinforcement distribution patterns, slope angle and so on. For three different patterns, the downwardly triangular distribution (DTD) pattern gets the best results, the upwardly triangular distribution (UTD) pattern obtains the worst outcomes, and the uniformly distribution (UD) pattern is between the UTD and DTD pattern.

在极限分析的框架内，研究了非饱和土中加筋3D边坡的地震稳定性，并考虑了非均质土和各向异性土的影响。在岩土工程中，钢筋通常用于改善边坡稳定性。由于复杂的地质过程，土壤是非均质且各向异性的。由于基质吸力，工程中考虑了不饱和特性。利用分析方法，提出了一套可以评价非饱和土中加筋3D边坡的地震稳定性的公式。这项工作采用拟动力方法来考虑地震作用，在两个时间和空间水平上求解工作率，最后采用分层求和的方式来获得地震作用下的结果。根据能量平衡关系，在这项研究中获得了所需增强强度的解析表达式。敏感度分析是针对某些参数进行的，例如钢筋分布模式，倾斜角度等。对于三种不同的模式，向下三角形分布（DTD）模式获得最佳结果，向上三角形分布（UTD）模式获得最差结果，并且均匀分布（UD）模式位于UTD和DTD模式之间。