评估高密度聚乙烯地质网的缩减少因子使用传统和分阶异热方法
Hang-Won Cho1,2, Kap-Jin Kim1, Nigel Edwin Wrigley3
1Department of Materials Science and Engineering, Kyung Hee University, 1732 Deogyeong-daero, Yongin 17104, Republic of Korea.
Materials (Basel, Switzerland)
|February 27, 2026
概括
高密度聚乙烯 (HDPE) 地质网的长期爬行性能对于强化土壤结构至关重要. 阶段异热法 (SIM) 适用于爬行评估,其20%的应变极限提供了可靠的设计标准.
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
背景情况:
- 地质合成材料的长期爬行行为,特别是高密度聚乙烯 (HDPE) 地质网,需要进一步澄清强化土壤结构.
- 现有的研究还没有完全解决不同故障标准对爬行性能或验证的爬行减少因子 (RFCR) 估计和阶段异热法 (SIM) 的不同故障标准的影响.
研究的目的:
- 通过使用常规测试和SIM.研究HDPE地质网的长期爬行行为.
- 评估SIM适用于加速爬行测试的适用性,并验证RFCR估计方法.
- 为了确定长期爬行性能最可靠的设计标准.
主要方法:
- 通过使用常规的爬行测试 (ISO 13431) 和分级同热法 (SIM) (ASTM D6992) 评估了HDPE地质网的爬行行为.
- 主曲线是在40-60%的负载水平下开发的最终抗拉强度.
- 使用20%的爬行应变和爬行破裂标准计算了100年设计寿命的爬行减少因子 (RFCR).
主要成果:
- 最初的SIM结果与常规测试一致,但由于HDPE的热敏感性,显示出超过1000小时的更高的爬行应变.
- 设计寿命为100年的RFCR值为3.04 (组合数据) 和2.43 (区块转移分析) 基于20%的爬行应变标准.
- 爬行破裂标准产生了2.30的较低RFCR,表明20%的应变极限更为保守.
结论:
- 20%的爬行应变极限是估计HDPE地质网的长期设计强度的更保守和可靠的标准.
- 步骤异热法 (SIM) 已被证实适用于HDPE地质网的加速爬行评估.
- 为选择合适的RFCR值在强化土壤结构设计中提供了实际指导.
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