Modeling Water Flow Patterns in Flexible Pavements
Modeling Water Flow Patterns in Flexible Pavements
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DOI：
10.1177/0361198105193600116
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发表时间：
2005
影响因子：
1.7
通讯作者：
K. Hansson;L. Lundin;J. Šimůnek
中科院分区：
文献类型：
--
作者：
K. Hansson;L. Lundin;J. Šimůnek
大多数道路设计模型没有明确地考虑道路中的水分传输机制，尽管众所周知，水分含量在道路恶化中起着重要作用。瑞典国家公路管理局旨在通过支持开发最终能够更好、更完整地描述道路和环境系统的模型来改善目前的状况。探讨了水文学理论和方法在道路与环境系统中的适用性。特别注意了道路内部的流动模式，这些流动模式受到毛细屏障的影响，由地表径流机制产生，然后渗入裂缝和路堤。颗粒示踪被用来研究降雨强度、沉降量或裂缝导流能力对流型的影响。雨强的变化对流型的影响不大，但雨强越大，流速越高。沉淀量的变化和裂缝导流能力的变化共同控制着流型的出现，但毛细管壁的作用有限。事实证明，所使用的数字代码在描述相关过程时是最合适的。
Most road design models do not explicitly account for moisture transport mechanisms in roads, even though it is well known that water content plays an important part in the deterioration of roads. The Swedish National Road Administration aims to improve the current situation by supporting the development of models that eventually can provide a better and more complete description of the road and environment system. The applicability of hydrological theories and methods to the road and environment system was investigated. Particular attention was paid to flow patterns inside the road as affected by capillary barriers and generated by mechanisms of surface runoff, followed by infiltration into cracks, and the embankment. Particle tracking was used to investigate the effect of rain intensity, precipitated amount, or fracture conductivity on the flow patterns. Changes in rain intensity had a small effect on flow patterns, but velocities were higher for larger rain intensities. Both changes in precipitated amount and fracture conductivity controlled the appearance of the flow patterns, but capillary barrier effects were limited. The numerical code used proved to be mostly appropriate in describing the relevant processes.