School of Highway, Chang'an University, South Erhuan Middle Section, Xi'an, 710064, China.
School of Highway, Chang'an University, South Erhuan Middle Section, Xi'an, 710064, China.
J Environ Manage. 2021 Oct 1;295:113087. doi: 10.1016/j.jenvman.2021.113087. Epub 2021 Jun 24.
Different infiltration tests of permeable pavements provide different measurements of the infiltration capacity. These measurements often do not represent the fundamental flow properties, and hence cannot be directly compared. This presents an undesirable obstacle to the sharing of experience and to obtaining a better understanding of the infiltration performances of different permeable pavements. This problem is especially acute in the case of interlocking-block permeable pavements (IBPPs), owing to the presence of joints and the different sizes, shapes, and laying patterns of paving blocks. To overcome this problem, the present study proposed a new approach for evaluating the infiltration capacity of an IBPP while retaining the same measuring devices in use today. This approach makes use of a finite-volume computational fluid dynamic method to develop a simulation model for an infiltration test. Once calibrated to define the hydraulic parameters of the IBPP being tested, the model can be applied to calculate the saturated infiltration capacity of the IBPP under actual rainfall conditions. The model also permits the calculation of a conventional infiltration capacity measurement, such as the average infiltration rate in mm/h as measured by a particular infiltration test, or the time required to drain the tested water depth. Thus, the proposed approach provides a meaningful common basis for comparing the infiltration capacities of different permeable pavements, including porous asphalt, pervious concrete, and IBPPs.
不同渗透铺面的渗透测试提供了对渗透能力的不同测量。这些测量结果往往不能代表基本的流动特性，因此不能直接进行比较。这对经验的共享以及更好地了解不同渗透铺面的渗透性能构成了不理想的障碍。在互锁块渗透铺面（IBPP）的情况下，由于存在接缝以及铺面块的不同尺寸、形状和铺设模式，这个问题尤为突出。为了解决这个问题，本研究提出了一种新的方法来评估 IBPP 的渗透能力，同时保留当今使用的相同测量设备。该方法利用有限体积计算流体动力学方法为渗透测试开发了一个模拟模型。该模型在经过校准以确定正在测试的 IBPP 的水力参数后，可以应用于计算实际降雨条件下 IBPP 的饱和渗透能力。该模型还允许计算常规渗透能力测量值，例如特定渗透测试中以毫米/小时（mm/h）为单位测量的平均渗透速率，或排空测试水深所需的时间。因此，所提出的方法为比较不同渗透铺面（包括多孔沥青、透水混凝土和 IBPP）的渗透能力提供了有意义的共同基础。
