不同水流作用下经纬向拉伸对土工织物覆砂系统渗透特性研究
| 作 者：王晗悦, 满晓磊, 葛颖, 吴英杰, 戎梦玉 |
| 单 位：滁州学院 |
| 基金项目：安徽高校自然科学研究项目重点项目；滁州学院大学生创新创业训练计划资助项目；滁州学院开放实验项目 |
| 摘 要： |
| 为研究不同水流作用下经纬向拉伸对土工织物覆砂系统渗透特性的影响，选取一种条膜机织有纺织物，将不同单向拉伸应变下的土工织物与非连续级配土组成反滤系统，利用自制的多功能梯度比渗透仪进行不同水流条件下的梯度比试验，探索土工织物覆砂系统的透水率、梯度比、漏土量等各参数的变化规律，并且针对不同拉伸状态下的土工织物试样进行对比观察，进而分析得出不同水流作用及不同拉伸方向对土工织物覆砂系统渗透特性的影响。由试验结果可知:单向水流条件下，有纺织物纬向拉伸下的透水和防淤堵性能均优于经向拉伸；纬向拉伸会使土工织物保土性能减弱，经向拉伸则相反；往复水流条件下织物覆砂系统各渗透参数的变化趋势与单向水流条件下基本相同；无论是经向拉伸还是纬向拉伸，单向水流条件下有纺织物的保土性能始终优于往复水流条件下的保土性能。 |
| 关键词：土工织物；渗透特性；单向拉伸；往复水流；梯度比试验 |
Study on Permeability Characteristics of Warp and Weft Tensile Soil-geotextile System under Different Water Flows
| Author's Name: |
| Institution: |
| Abstract: |
| To study the effect of warp and weft stretching on the permeability characteristics of the soil-geotextile system under different water flows, a series of gradient ratio tests under different flow conditions were carried out by using the self-made multifunctional gradient ratio permeator. A kind of geotextile (strip film woven fabric) was employed in the test. The filtration systems were composed of the geotextiles under-designed uniaxial strains and gap-graded soils. In the test, the variation of the water loss, gradient ratio, and soil loss with time were studied. Through comparative observation of geotextile samples under different tensile conditions, the effects of different water flow and different tensile directions on the permeability of the soil-geotextile system were analyzed. The research results show that: under the condition of unidirectional flow, the water permeability and anti-silting performance of fabrics with weft stretching were better than those with warp stretching. Soil conservation properties of geotextiles were weakened by weft stretching, but opposite by warp stretching. Trends of permeability parameters of the soil-geotextile system under cyclic flow and unidirectional flow are basically the same. Whether in warp or weft stretching, the soil conservation property of geotextiles under unidirectional flow was always better than that under cyclic flow. |
| Keywords: geotextile; permeability characteristics; unidirectional tension;cyclic flow; gradient ratio test |
| 投稿时间：2022-09-08 |
|
|
|
查看pdf文件
|
|
