往复水流作用下单向拉伸对土工织物覆砂系统渗透特性的影响

Effect of Unidirectional Tension on Permeability of Geotextile Coated sand System under Cyclic Flow

目的:探究在往复水流作用下单向拉伸对土工织物覆砂系统渗透特性的影响。方法:采用往复水流渗透试验装置进行室内试验研究,对比单向拉伸后的2种土工织物在往复水流作用下的流速、漏砂量与梯度比,分析单向拉伸对土工织物覆砂系统脱水性能、保土性能与防淤堵性能的影响。结果:在往复水流的作用下,单向拉伸会减小土工织物的等效孔径,从而造成土工织物覆砂系统脱水性能的降低、保土性能的增加、防淤堵性能的减弱。结论:该影响研究可在实际过程中选出最优解。

Objective:To explore the effect of uniaxial tension on the permeability of geotextile coated sand system under cyclic flow.Methods:Cyclic flow infiltration test device was used to carry out laboratory test research.The flow velocity,sand leakage and gradient ratio of two kinds of geotextiles after uniaxial tension under the action of cyclic flow were compared,and the influence of uniaxial tension on the dewatering performance,soil retention performance and anti-clogging performance of geotextile sand system were analyzed.Results:Under the action of cyclic flow,unidirectional tension will reduce the equivalent pore size of geotextile,resulting in the decrease of dewatering performance of geotextile coated sand system,the increase of soil conservation performance and the weakening of anti-clogging performance.Conclusion:The optimal solution can be selected in the actual process.