单向拉伸对土-土工织物系统渗透特性的影响试验

Experiment on influence of uniaxial tension on permeability characteristics of soil-geotextile system

为探究单向拉伸对土-土工织物系统渗透性能的影响,选取了同一种类型3种不同规格的有纺土工织物,利用常水头渗透仪分别对经向、纬向拉应变为0%、3%、6%、9%状态下的W100、W120、W150土工织物进行常水头渗透试验,并分析单向拉伸对3种织物渗透特性的影响。结果表明:不同规格的土工织物在受经向拉伸时,土-土工织物系统的渗透系数呈现出一种先下降再上升的趋势;在受纬向拉伸时,土-土工织物系统的渗透系数不断增大且没有最终稳定值。

In order to explore the influence of uniaxial tension on the permeability of soil-geotextile system,three kinds of woven geotextiles of the same type and three different specifications were selected.The constant head permeameter was used to conduct constant head permeability tests on three different specifications of geotextiles with warp and weft tensile strains of 0%,3%,6%and 9%,and the influence of uniaxial tension on the permeability of four kinds of geotextiles was analyzed.The results show that the permeability coefficient of soil-geotextile system shows a trend of decreasing first and then increasing when the geotextiles of different specifications are stretched in the warp direction.When subjected to weft tension,the permeability coefficient of the soil-geotextile system increases continuously and there is no final stable value.