摘要
【目的】为改善隧道南北洞口气候差异及渗水影响下,洞内沥青路面长期积水严重影响行车安全的特殊路面状况,对高湿度隧道环境沥青透水路面质量与性能提升关键技术进行研究。【方法】首先,通过稳定度、浸水肯塔堡飞散、渗水、连通空隙率等试验,研究混合料中矿粉占细集料比例对透水沥青混合料性能的影响;其次,通过模拟洞内环境条件采用旋转剪切试验,优选层间黏结材料;最后,通过研究对比不同碾压工艺下路面排水性能与层间黏结性能,确定最佳碾压工艺。【结果】研究发现,矿粉替代量的提高有利于提升混合料的耐久性,但降低了连通空隙率;胶轮碾压及振压均对罩面层混合料透水性能影响明显,合适的胶轮碾压遍数有利于提升面层耐久性。【结论】研究成果为潮湿型隧道沥青路面有效解决抗滑、耐久问题,以及为有特殊环境需求的透水混合料设计提供了科学有效的思路。
[Purposes]To address the specific pavement condition where long-term water accumulation on the asphalt pavement inside the tunnel,caused by the climate difference between the north and south entrances and water seepage,severely affects traffic safety,research on key technologies for improving the quality and performance of asphalt permeable pavement in high-humidity tunnel environments is necessary.[Methods]Firstly,the influence of the proportion of mineral powder to fine aggregate in the mixture on the performance of permeable asphalt mixture was studied through tests of stability,Cantabro loss(immersed),water seepage,and connected void ratio.Secondly,by simulating the environmental conditions inside the tunnel and using the rotary shear test,the interlayer bonding material was optimized.Finally,by studying and comparing the pavement drainage performance and the interlayer bonding performance under different compaction processes,the optimal compaction process was determined.[Findings]The research found that an increase in the mineral powder replacement amount is beneficial for improving the durability of the mixture but reduces the connected void ratio.Both rubber-tire rolling and vibratory steel-wheel rolling significantly affect the water permeability of the overlay mixture.An appropriate number of rubber-tire rolling passes is conducive to improving the durability of the surface layer.[Conclusions]The research findings provide scientific and effective ideas for effectively solving the skid resistance and durability problems of asphalt pavement in humid tunnels and for the design of permeable mixtures with special environmental requirements.
作者
姚新宇
李乃强
刘宇
YAO Xinyu;LI Naiqiang;LIU Yu(Guangxi Communications Investment Technology Co.,Ltd.,Nanning 530002,China;Guangxi Expressway Maintennance Research Center of Engineering Technology,Nanning 530002,China;Guangxi Communications Investment Group Nanning Expressway Operation Co.,Ltd.,Nanning 547002,China)
出处
《河南科技》
2025年第22期78-84,共7页
Henan Science and Technology
关键词
隧道
路面排水
路面抗滑
连通空隙
层间黏结
tunnel
pavement drainage
pavement skid resistance
connected voids
interlayer bonding
