透水路面现场透水性测试方法比较

Comparison of Field Permeability Test Methods for Permeable Pavement

现场准确测定透水路面(PP)的透水性是PP性能评价及维护的重要依据。以实验室透水混凝土(PC)试块测定结果为参照,通过试验比较了单环定水头法、单环变水头法、双环法等几种现场透水性测定方法的准确度,并进一步对透水环直径、测试水头等因素的影响进行了探讨。结果表明,现场测定PP透水系数时,测试水头在50 mm以下、内环直径在200 mm以上的双环定水头法的测定结果具有良好的准确度,可为PP现场透水性的准确测试提供借鉴。

Accurate determination of permeability coefficient of the permeable pavement ( PP) is an important basis for its performance evaluation and maintenance. Based on the testing results of laboratory permeable concrete (PC) specimen, the accuracy of the three field permeability test methods, such as constant water head single-ring method, falling water head single-ring method and double-ring method , was compared , and the influence of the diameter of the ring, testing water head and other factors were further discussed. The results showed that the double-ring field permeability test method had the highest accuracy in the field determination of PP permeability coefficient when water head was less than 50 mm and the inner ring diameter was above 200 mm. The results provide a good reference for the field test of PP permeability coefficient.