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PVC-P地质膜的寿命预测在高温下浸入水中

Xianlei Zhang¹, Jingxin Zheng¹, Hesong Liu²

¹School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China.

|June 13, 2025

概括

塑化聚乙烯基化物地质膜 (PVC-P GMBs) 的耐用性对水至关重要. 较高的增塑剂含量和厚度显著延长了PVC-PGMB的使用寿命,确保了长期的运行安全.

科学领域:

地质技术工程地质技术工程
材料科学材料科学材料科学
聚合物科学聚合物科学

背景情况:

塑化聚乙烯地质膜 (PVC-P GMBs) 是水力结构如水中的关键防漏部件.
确保这些地质膜的长期运行耐用性对于基础设施安全至关重要.

研究的目的:

在模拟操作条件下评估PVC-PGMB的使用寿命和降解机制.
开发PVC-PGMB的名义失效时间 (TNF) 的预测模型.

主要方法:

在三种类型的PVC-PGMB上进行了水浸式加速老化试验.
进行了轴向拉伸试验,以评估机械性能的退化.
我们使用阿雷尼乌斯方程来构建一个降解模型来预测TNF.

主要成果:

PVC-P GMB 的 TNF 受到水温,塑化剂含量和 GMB 厚度的显著影响.
高温加快了增塑剂的损失;较高的初始增塑剂含量和增加的厚度扩展了TNF.
在20°C时,预测的TNF从49.05年 (材料A) 到153.76年 (材料B),而材料C (更厚) 达到181.30年.

结论:

增加塑化剂含量和GMB厚度是提高PVC-PGMB运行寿命的有效策略.
开发的降解模型为评估PVC-PGMB在水下应用中的长期性能提供了理论基础.
这些发现支持PVC-PGMB在水库底部和死水水平以下的可靠应用.

关键词:

这是一种PVC-P地质膜.阿雷尼乌斯模型的模型突破应变的压力压力是什么压力中断压力中断名称故障的时间.

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