桥梁桩基防护用玄武岩复合纤维套筒的抗冲磨试验研究

Experimental study on impact abrasion resistance performance of basalt composite fiber sleeve used for bridge pile foundation protection

介绍了用于解决桥梁水下桩基腐蚀及冲刷问题的玄武岩复合纤维套筒防护技术。为检验玄武岩复合纤维护筒的抗冲磨效果，重点开展了基于水下钢球法的玄武岩复合纤维板材的抗冲磨试验研究。试验结果表明，冲磨试验前后以及不同冲磨周期下试件板材的颜色均存在明显差异；与裸露混凝土试件相比，采用玄武岩复合纤维板防护试件的平均抗冲磨强度增加，同时平均磨损系数显著降低；随着冲磨周期的增加，材料抗冲磨强度逐渐增大，而磨损系数趋于稳定。本文试验验证了玄武岩复合纤维套筒具有较好的抗冲磨能力和长期抗冲磨稳定性，可用于桥梁水下桩基的工程防护。

This paper introduces the protection technology for solving the corrosion and scour of bridge underwater pile foundation by using basalt composite fiber sleeve. In order to verify the impact abrasion resistance performance of basalt composite fiber sleeve, an impact abrasion-resistance experiment was carried out for basalt composite fiber sheets, based on underwater steel ball method. Experimental results show that there are obvious differences in the color of basalt composite fiber sheet specimens before and after impact abrasion experiment or after different abrasion cycles. Compared with exposed concrete specimen, the average impact abrasion-resisting strength of basalt composite fiber sheet specimen increases, at the same time, the average wear coefficient significantly decreases. Along with the increase of abrasion cycles, the impact abrasion-resisting strength increases and the wear coefficient of material tends to be stable. Above experiment verifies that basalt composite fiber sleeve has good abrasion-resisting performance and long-term abrasion-resisting stability, and can be used in engineering protection of underwater pile foundation of bridge.