Flexible pavement drainage system effectiveness
Flexible pavement drainage system effectiveness
复制标题
柔性路面排水系统的有效性
DOI：
10.1016/j.conbuildmat.2019.05.088
复制
发表时间：
2019
影响因子：
7.4
通讯作者：
J. Haddock
中科院分区：
文献类型：
--
作者：
Masoud Ghavami;M. Hosseini;P. Zavattieri;J. Haddock
水分会显著影响柔性（沥青）路面性能。因此，尽快去除此类路面上的水分非常重要，特别是要避免水分进入路面路基。使用适当的排水系统是从路面结构中去除水分的一种方法。本研究的目的是评估柔性路面排水系统的有效性，使用目前指定的材料，以确定是否，以及何时，排水系统可以安全地排除路面。通过室内试验研究了沥青材料的水力学特性，并将其应用于路面断面的数值模拟。结果表明，排水层能有效降低路基含水量。此外，虽然结果表明，密实级配骨料或密实级配沥青混合料可用作路基和开级配排水层之间的过滤层，但当使用颗粒过滤层时，路基的含水量往往较低。最后，结果表明，边缘排水有积极的影响，特别是在路面上，不包含排水层的柔性路面。
Moisture can significantly affect flexible (asphalt) pavement performance. As such, it is important to remove moisture as quickly as possible from such pavements, especially to avoid allowing moisture into the pavement subgrade. Using an appropriate drainage system is one method to remove moisture from pavement structures. The objective of this research is to evaluate the effectiveness of flexible pavement drainage systems using currently specified materials to determine if, and when, the drainage system can be safely excluded from the pavements. Moreover, the effects of filter layer and edge drains are also examined.Laboratory experiments were performed to obtain the hydraulic properties of asphalt materials and used in the numerical modeling of pavement sections. The results indicate that drainage layers do effectively lower the subgrade moisture content. Also, while the results show that either a dense-graded aggregate or a dense-graded asphalt mixture can be used as a filter layer between the subgrade and the open-graded drainage layer, the subgrade tends to have lower moisture when a granular filter layer is used. Finally, the results indicate edge drains have a positive effect on flexible pavements, especially on pavements that do not contain a drainage layer.