无纺布淤堵指标的评价模型研究

针对无纺布淤堵指标的评价问题,通过对航道整治工程岸坡反滤层中常用的短纤针刺非织造土工布的淤堵指标的透水准则和梯度比准则进行研究,找出两者之间的关系结合点:标准排水边坡的水力梯度值和梯度比限值,并基于此结合点开展无纺布的淤堵试验,对淤堵指标的评价模型进行探索研究,拟合出航道整治工程岸坡反滤层中无纺布淤堵指标的评价模型公式,以期指导计算无纺布能正常发挥反滤功能的时间期限。成果填补了该领域研究的空白,奠定了该领域研究的基础,为今后促进该领域的研究具有重要的价值和意义。

Evaluation model about clogging index of non-wovens

In view of the evaluation question of the non-woven clogging index,this paper studies the permeation criterion and the gradient ratio criteria about the clogging index of the nonwoven geotextile commonly used in the slope filter layer of the channel regulation project,and finds out the relationship between the two points:the hydraulic gradient of the standard drainage gradient and gradient ratio limit.Based on this combination point,this paper carries out a series of non-woven clogging tests,and explores the evaluation model of non-woven clogging index to fit the evaluation formula of the non-woven clogging index in the anti-filtration layer of the bank slope and guide the calculation of the time period for non-woven fabric to function properly.The results fill the gaps in the field of research,lay the foundation for the study in this field,and have important value and significance for the future to promote the study of the field.