Abstract Waterproofing heavily influences the operation and maintenance costs of underground structures. Currently, the most commonly used technology for tunnel waterproofing is plasticized polyvinyl chloride (PVC-P) geomembranes. However, not much is known about the long-term durability of these geomembranes, especially in relation to the long expected lifespan of new tunnels (i.e. 100–150 years). Therefore, in this paper, the durability of two commercially available PVC-P geomembranes is studied with the help of a specifically designed accelerated ageing device in addition to mechanical and absorption tests. The degradation resulting from plasticizer loss is extrapolated to the long term, and a threshold value for the end-of-life of the PVC-P geomembrane is estimated from the mechanical tests.

中文翻译：

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通过实验室测试对 PVC-P 防水土工膜进行长期耐久性评估

摘要 防水工程严重影响地下结构的运行和维护成本。目前，隧道防水最常用的技术是增塑聚氯乙烯（PVC-P）土工膜。然而，人们对这些土工膜的长期耐用性知之甚少，尤其是与新隧道的预期寿命（即 100-150 年）有关。因此，在本文中，除了机械和吸收测试外，还借助专门设计的加速老化装置研究了两种市售 PVC-P 土工膜的耐久性。由增塑剂损失导致的降解被外推到长期，并且 PVC-P 土工膜寿命终止的阈值从机械测试中估计出来。