用聚氨强化路床土壤的冰特征的研究使用分布式光纤传感
1Nanping Wusha Expressway Co., Ltd., Jianyang 354200, China.
Polymers
|December 31, 2025
概括
这项研究确定了最佳的聚氨 (PU) 含量,用于加强结土壤道路床,发现8-12%的PU显著减少. 较低的PU含量显示出最小的影响,而较高的PU含量则导致回报减少.
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
- 土木工程 土木工程是指土木工程.
背景情况:
- 聚氨 (PU) 对于加强结土壤路床是有效的,但由于过度使用,它面临成本和环境影响的挑战.
- 优化PU含量对于在实际应用中平衡钢筋的有效性,成本和可持续性至关重要.
研究的目的:
- 确定最佳的聚氨含量,以加强冷土路床,重点是以最低的成本实现最佳的强化效果.
- 通过先进的测量技术,研究PU含量,水含量和环境温度对升的影响.
主要方法:
- 进行了实验室测试,以评估PU增强土壤样本中的升.
- 雷利光学频域反射测量 (OFDR) 技术被用于连续的冰强度应变概况.
- 开发并应用了OFDR在负温度下的校准方法.
主要成果:
- 随着PU含量显著降低,冰暴的排离率显著降低,在特定条件下,在8-16%的PU下观察到最佳降低 (4.7%的湿度,-20°C).
- 低于4%的PU含量显示不显著的增强效应.
- 增加的水分含量导致了PU强化土壤中暴移的增加,但随着PU含量增加,这种效应会减弱.
结论:
- 聚氨增强剂有效地减少了土壤中的,并确定了用于实际应用的最佳含量范围.
- 该研究确定了变压转移的温度依赖关系,立方函数最好描述在0°C以下的行为.
- 增加聚氨会改变土壤孔隙结构和基质吸收,导致结点和升率降低.
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