单向拉伸对编织布覆砂系统渗透特性的影响

Effect of Unidirectional Tension on Permeability of Braided Cloth Sand Covering System

为探究单向拉伸对土工织物覆砂系统渗透特性的影响,选取工程中常用的一种土工织物,并采用梯度比渗透仪对不同拉应变下的土工织物覆砂系统进行渗透试验,分析不同拉应变对透水率、漏砂量、流速、梯度比等渗透特性参数的影响。试验结果表明:土工织物在受经向拉伸状态下,其透水性能和防淤堵性能先下降后上升,保土性能先上升后下降,当拉应力为3%时,保土性能最优,透水性能和防淤堵性能最差;在纬向拉伸状态下,其保土性能持续下降,透水性能和防淤堵性能持续上升。

In order to explore the influence of unidirectional tension in different directions on the permeability of geotextile sand covering system,two kinds of woven geotextiles of the same type and different specifications were selected,and the permeability tests of two kinds of geotextile sand covering systems under non tension,warp and weft tension were carried out by gradient specific permeability meter,and the effects of warp and weft tension on the permeability Influence of seepage characteristic parameters such as anti silting performance and soil conservation performance.The test results show that when the geotextile is stretched in the warp direction,its water permeability and anti silting properties are weakened,and its soil retention performance is enhanced;Under zonal tension,its water permeability and anti silting performance are enhanced,and its soil conservation performance is weakened;The thickness of geotextile also has a great influence on its water permeability,soil retention and anti silting performance.