塑料排水板滤膜垂直渗透系数试验及计算方法探讨

Discussion on Test and Calculation Method for Vertical Penetration Factor of Plastic Drain Filter Membrane

通过对现行规范的分析比较,以同一个样品的五个试样为例,对塑料排水板滤膜垂直渗透系数的检测和计算方法进行讨论和试验研究。渗透试验中滤膜厚度采用2kPa压力下测量的厚度,用三种计算方法计算渗透系数结果表明:所有试样的渗透系数平均值小于所有过原点线性段渗透系数平均值,也小于所有线性段渗透系数平均值。从最不利条件考虑,建议选取所有试样的渗透系数平均值计算法较为合理。

By comparing current specifications and taking 5 samples of the same plastic drain,the test and calculation methods for the thickness and penetration factor of plastic drain filter membrane is researched and discussed.The thickness of the filter membrane is measured under and 2 kPa pressure.The penetration factor of plastic drain filter membrane is calculated with three methods.The calculated results are shown that the average value of all penetration factors is less than the average value of ones passing the original point and also less than the average value of ones of lineal section.Considering the worst condition,the average value of all penetration factors is suggested.