双层排水路面的渗水性能测试与分析

Test and Analysis of Seepage Performance of Double-deck Drainage Pavement

排水沥青路面的排水能力与多孔沥青混凝土的渗透性能相关。通过室内试验、室外试验和有限元模拟方法对双层排水路面的渗水性能进行了分析。测试结果表明,路面的排水性能随着横坡坡度的增加而变大,而横坡坡度超过2%时,纵坡对路面排水性能的影响程度有限;面层厚度越大,雨后双层排水沥青混合料内部残留水分越多,需要更长的周期才能挥发彻底;采用自动电子渗水仪可以更为准确地测试双层排水沥青路面渗水系数。

The drainage capacity of drainage asphalt pavement is related to the permeability of porous asphalt concrete. The seepage performance of double - deck drainage pavement was analyzed by laboratory test, outdoor test and finite element simulation. The test results show that the drainage performance of the road surface increases with the slope gradient, when the slope gradient is more than 2% , the influence of longitudinal slope on the drainage performance is limited. The thicker the surface layer, the more moisture left in the double - layer asphalt mixture after rain, need a longer cycle in order to completely volatile. Using automatic electronic water seepage meter can he more accurate test of double - decker drainage asphalt pavement water seepage coefficient.