不同光照度下有纺织物孔径变化试验研究  

Experimental Study on Pore Size Characteristics of WovenGeotextiles under Different Illuminance

作　　者：唐晓武[1,2] 李柯毅 赵文芳 陈式华[3] 林维康 梁家馨[1,2] TANG Xiao-wu;LI Ke-yi;ZHAO Wen-fang;CHEN Shi-hua;LIN Wei-kang;LIANG Jia-xin(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Engineering Research Center of Urban Underground Development of Zhejiang Province,Hangzhou 310058,China;Zhejiang Institute of Hydraulics&Estuary,Hangzhou 310020,China)

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,杭州310058 [2]浙江省城市地下空间开发工程技术研究中心,杭州310058 [3]浙江省水利河口研究院,杭州310020

出　　处：《长江科学院院报》2023年第5期94-99,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51779218);浙江省水利科技计划重点项目(RB2027)。

摘　　要：土工织物的孔径是反滤设计的重要参数,采用数字图像法进行测量是一种精准且重复性较高的方法。采用照度来衡量光源距离和光源亮度对织物图像的影响,在不同照度下采集图像,分析两种不同规格有纺织物的孔洞形态、孔径分布曲线、特征孔径变化,并将织物实际平均孔径与不同照度下平均孔径拟合直线对比。研究结果表明:随着光照度增加孔洞面积测量值会增大,测量得到的孔洞形态发生变化;孔径分布曲线向孔径增大方向移动;特征孔径(d95、d50、d30)测量值均增大;平均孔径测量值均呈现增大趋势,可表示为线性回归方程。数字图像法得出的织物孔径测量值与实际孔径有一定差异,两种织物的最佳光照度在9 lx附近,应通过试验确定最佳光照度,从而减少误差。Pore size of woven geotextile is a crucial parameter in filter design.The digital image method is a precise and repeatable technique.In this study,we used illuminance to examine the impact of light source distance and brightness on textile image quality.Images were collected under different illuminance levels,and the changes in pore shape,pore size distribution curve,and characteristic pore size of two different textile specifications were analyzed.The actual average pore size of the geotextiles was compared with the fitted straight line of the average pore size under different illuminance levels.Experimental results show that with the increase of illuminance,the measured hole area increases,and the hole shape changes.The pore size distribution curve moves towards the direction of the increase of pore size,and the measured values of characteristic pore size(d 95,d 50,d 30)increase.The average measured pore size presents an increasing trend,which can be expressed as a linear regression equation.The pore size obtained by the digital image method differs from the actual pore size.The optimal illuminance for the two textiles falls near 9 lx.Therefore,the best illuminance should be determined through experiments to reduce error.

关 键 词：有纺织物 光照度 数字图像法 特征孔径 

分 类 号：TU531.7[建筑科学—建筑技术科学]