无纺土工织物垂直渗透特性试验研究

采用单位面积质量为 200，300，400 g/m2 的无纺土工织物开展了一系列垂直渗透试验，分析了各组试验结果的差异，并探讨了试样单位面积质量和层数对试验结果的影响。结果表明：流速与水头差成线性关系，并随着试样层数的增加而减小；透水率随着单位面积质量和试样层数的增加逐渐下降；各组试样的垂直渗透系数值在同一数量级，相同单位面积质量的试样垂直渗透系数随层数的变化无明显规律；相同层数试样的垂直渗透系数随着单位面积质量的增加而减小。

Experimental study on the vertical permeability of nonwoven geotextiles

A series of vertical permeability tests were conducted using non-woven geotextiles with unit area weights of 200, 300,400 g/m2.The differences in the results of each test group were analyzed, and the influence of the unit area mass and the number of layers of the samples on the test results was discussed.The results indicated that the flow rate was linearly related to the hydraulic head, decreasing with an increase in the number of sample layers. The permeability gradually decreased with an increase in unit area weight and the number of samplelayers. The vertical permeability coefficient values for various sample groups are within the same order of magnitude. For specimens with the same unit area weight, the vertical permeability coefficient showed no obvious pattern with respect to the number of layers. With the same number of sample layers, the vertical permeability coefficient decreases with an increase in unit area weight.