Abstract The paper examines the effects of settlement-induced downdrag on geosynthetic liner systems for a waste containment facility with steep side slopes for different design scenarios, and conducts the stability analysis of the waste mass during waste filling operations. Without the presence of a reinforcing layer above a geomembrane (GMB) liner, the liner experiences unacceptable tensile strains under both short- and long-term downdrag waste settlements. It is shown that an anchored high strength/stiffness geotextile (HS-GTX) reinforcement over the GMB can reduce the GMB tensile strains to less than 3%, but the HS-GTX itself may be overloaded. A geosynthetic slip layer over the full or partial HS-GTX reinforcement overlying the GMB can reduce the tensile strains of the GMB to less than 3% and of the HS-GTX to less than 5% by providing a preferential slip plane between the geosynthetic slip layer and the HS-GTX. A rupture of the geosynthetic slip layer is likely to occur resulting in the exposure of the HS-GTX to the waste, but the protection of the GMB by the HS-GTX is still expected. The results from the stability analysis show that, during waste filling operations under a given factor of safety, there is a critical relationship between the width of the top of the waste pile and the total waste thickness.

中文翻译：

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内衬系统内具有优先滑动面的废物围护设施的土工合成材料内衬完整性和稳定性分析

摘要 本文研究了不同设计场景下沉降引起的下沉对具有陡峭边坡的垃圾围护设施土工合成材料衬垫系统的影响，并在垃圾填充操作过程中对垃圾质量进行了稳定性分析。如果在土工膜 (GMB) 衬里上方不存在增强层，则衬里在短期和长期向下拖动废物沉降下都会经历不可接受的拉伸应变。结果表明，在 GMB 上锚定高强度/刚度土工布 (HS-GTX) 增强件可以将 GMB 拉伸应变降低到小于 3%，但 HS-GTX 本身可能会过载。通过在土工合成材料滑移层之间提供优先滑移面，在覆盖 GMB 的全部或部分 HS-GTX 钢筋上的土工合成材料滑移层可以将 GMB 的拉伸应变降低到 3% 以下，将 HS-GTX 的拉伸应变降低到 5% 以下层和 HS-GTX。土工合成材料滑移层可能发生破裂，导致 HS-GTX 暴露于废物中，但仍预期 HS-GTX 对 GMB 的保护。稳定性分析结果表明，在给定安全系数下的垃圾填埋作业中，垃圾堆顶宽度与垃圾总厚度之间存在临界关系。但 HS-GTX 对 GMB 的保护仍然值得期待。稳定性分析结果表明，在给定安全系数下的垃圾填埋作业中，垃圾堆顶宽度与垃圾总厚度之间存在临界关系。但 HS-GTX 对 GMB 的保护仍然值得期待。稳定性分析结果表明，在给定安全系数下的垃圾填埋作业中，垃圾堆顶宽度与垃圾总厚度之间存在临界关系。