中文摘要：

针对填埋场衬垫系统薄弱界面容易失稳，在加肋土工膜与砂土界面力学机制分析的基础上，改进了传统双楔体分析法，考虑了加肋土工膜肋块端部端承阻力对衬垫系统稳定性的影响，建立了加肋土工膜衬垫系统稳定性分析解析解。结合某实际工程初步设计，对加肋土工膜衬垫系统进行了稳定性分析，探讨了肋块形状、肋块高度和加肋间距对衬垫系统安全系数的影响。分析结果表明，该解析解能更好地计算加肋土工膜衬垫系统的安全系数。当加肋间距为20mm时，肋块高度对安全系数的影响较大；当肋块高度一定时，安全系数随着加肋间距增加而逐渐减小；在加肋间距大于200mm之后，加肋土工膜已接近光面土工膜的剪切特性。

英文摘要：

The weak interface of landfill liner system is easy to be instable. Based on the mechanism analysis of reinforced geomembrane and sand interface, and combined with the traditional two wedges analysis model, the bearing resistance effect on the stability of the landfill liner system is considered; and an analytic solution of the slope stability is also built. Associated with the preliminary design of practical projects, the stability of reinforced geomembrane liner system is studied. The effects of reinforcement shape, reinforcement height and reinforcement space on the slope stability are analyzed. Analysis results show that this analytic solution can better calculate the safety factor of reinforced geomembrane liner system. When the reinforcement space comes to 20 mm, the effect of reinforcement height on safety factor is bigger. When the reinforcement height reaches a certain value, the safety factor decreases with the increasing reinforcement space. But if the reinforcement space is larger than 200 mm, the shear properties of reinforced geomembrane are close to that of smooth geomembrane.