Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an, 710064, Shaanxi, China.
Jiaxing Highway and Transportation Management Center, Jiaxing, 314000, Zhejiang, China.
Environ Sci Pollut Res Int. 2024 Apr;31(19):28734-28753. doi: 10.1007/s11356-024-33067-6. Epub 2024 Apr 1.
Permeable pavement is superior in functions such as reducing noise, improving traffic safety, and protecting urban water environment. However, contaminants on the pavement due to spillage of transported goods, deposits from vehicle wear and tear, and natural settlement can cause the risk of blockage when these contaminants enter the interior of the permeable pavement. Timely maintenance of permeable performance can effectively solve the degradation of environmental performance of permeable pavement caused by clogging. Consequently, exploring permeable pavement clogging patterns can support determining the timing of maintenance. In this paper, simulation clogging material gradations were formulated based on actual road clogging conditions. According to the self-developed permeable pavement clogging simulator, the clogging behavior of permeable pavement was comprehensively explored, taking external conditions, mix proportion, structural combination, and long-term clogging conditions into consideration. Moreover, the effect of external conditions on the clogging pattern was simulated by varying the rainfall intensity and clogging particle size. Furthermore, the effects of gradation, void rate, nominal maximum particle size, and the overwater section on the clogging resistance were investigated. The clogging-sensitive particle size under different structures was determined. It is demonstrated that the water head height is the crucial factor on the clogging behavior. Greater rainfall intensity and water head height lead to more severe clogging. The increase of nominal maximum aggregate size is beneficial to the anti-clogging ability of permeable pavement. Also, the clogging material with small particle sizes is more likely to cause structural clogging. Finally, the evaluation index of clogging level was put forward, which divides the clogging level of permeable pavement into mild, moderate, and severe. The research can support the rationalization, intelligence, and convenience of permeable pavement maintenance timing decisions. Meanwhile, there is key significance to the promotion application and performance maintenance.
透水路面在降低噪音、提高交通安全和保护城市水环境等方面具有优势。然而，由于运输货物的溢出、车辆磨损的沉积物以及自然沉降等原因，路面上的污染物可能会进入透水路面内部，从而导致堵塞的风险。及时维护透水性能可以有效地解决因堵塞而导致的透水路面环境性能退化问题。因此，探索透水路面堵塞模式可以支持确定维护时机。本文根据实际道路堵塞情况，模拟了堵塞材料级配。根据自主研发的透水路面堵塞模拟器，综合考虑了外部条件、配合比、结构组合和长期堵塞条件，全面探讨了透水路面的堵塞行为。此外，还通过改变降雨强度和堵塞颗粒尺寸来模拟外部条件对堵塞模式的影响。进一步研究了级配、空隙率、公称最大粒径和过水段对堵塞阻力的影响。确定了不同结构下的堵塞敏感粒径。结果表明，水头高度是堵塞行为的关键因素。较大的降雨强度和水头高度会导致更严重的堵塞。公称最大骨料粒径的增加有利于提高透水路面的抗堵塞能力。此外，粒径较小的堵塞材料更有可能导致结构堵塞。最后，提出了堵塞程度的评价指标，将透水路面的堵塞程度分为轻度、中度和重度。该研究可以为透水路面维护时机的合理化、智能化和便利化提供支持。同时，对促进透水路面的推广应用和性能维护具有重要意义。
