无纺织物单向拉伸孔径变化试验与理论预测对比分析

唐琳; 唐晓武; 赵庆丽; 王艳; 白彬

doi:10.11779/CJGE201510020

无纺织物单向拉伸孔径变化试验与理论预测对比分析 English Version

1. 哈尔滨工业大学（威海），山东威海 264209;
2. 浙江大学建筑工程学院滨海和城市岩土工程研究中心，浙江杭州310058;
3. 宁波大学建筑工程与环境学院，浙江宁波 315000

基金项目: 国家自然科学基金项目（51308310）; 山东省自然科学基金项目（ZR2015PE006）; 山东省蓝色经济区工程建设与安全协同创新中; 心项目; 哈尔滨工业大学（威海）校科学研究基金项目（HIT（WH）201423）

详细信息

作者简介:
唐琳 (1986- )，女，讲师，主要从事土工合成材料等方面的教学和科研。E-mail: tanya_tang3@163.com。

中图分类号: A
计量
- 文章访问数: 293
- HTML全文浏览量: 4
- PDF下载量: 379
出版历程
- 收稿日期: 2015-01-03
- 发布日期: 2015-10-19

Analytical prediction and experimental research on pore size of nonwoven geotextiles under unconfined uniaxial tensile strain

1. Harbin Institute of Technology at Weihai, Weihai 264209, China;
2. Research Center of Coastal and Urban Geotechnical Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
3. Architectural Engineering and Environment College, Ningbo University, Ningbo 315000, China

摘要

摘要: 无纺织物作为反滤材料，常处于单向受拉工作状态。单向拉伸引起无纺织物孔径变化，易导致反滤工程失效。通过控制织物应变的干筛试验，定量测试了无侧限单向拉应变逐级增大的过程中，两种不同厚度短纤针刺无纺织物的孔径分布曲线变化。采用干筛试验结果，对现有两种体系的单向应变下无纺织物孔径预测理论解进行验证：一类是佘巍等效孔径O₉₅理论解，一类是Rawal孔径分布曲线理论解。通过对比两种理论解对各级拉应变下的O₉₅值预测，归纳二者的预测误差规律，从理论假设出发分析误差原因。同时采用前人图像法测得的热粘无纺织物O₉₅变化验证两类理论解。两种理论解均能较好地预测无侧限单向拉应变下无纺织物O₉₅的变化规律。O₉₅随单向拉应变呈近似线性减小的规律。对于O₉₅变化斜率的预测，佘巍解较准确，Rawal解偏大。对于O₉₅数值预测可结合两类理论解给出变化范围。
- 无纺织物 /
- 无侧限单向拉应变 /
- O95 /
- 孔径分布曲线 /
- 理论解 /
- 干筛
Abstract: The filtration applications of nonwoven geotextiles are usually subjected to uniaxial tensile strain, resulting in the variation of pore sizes and failure of filtration engineering. The pore-size distributions of two needle-punched nonwoven geotextiles subjected to unconfined uniaxial tensile strains are measured by using the strain-controlled dry sieving tests. The experimental results of the dry sieving tests are compared with the predictions of two analytical solutions. One is the analytical solution of equivalent opening size O₉₅ proposed by She Wei. The other is the analytical solution of pore-size distribution proposed by Rawal et al. The experimental values of O₉₅ of two thermally bonded nonwoven geotextiles tested by previous studies are used to confirm the validity of the two analytical solutions. By comparing the predictions of O₉₅, the accuracy and the error of two analytical solutions are analyzed. O₉₅ decreases approximately linearly with unconfined uniaxial tensile strains. The prediction of the variation rate by She Wei is accurate, while that by Rawal et al. is larger than the experimental rate. The prediction of the value of O₉₅should be done considering the results of She Wei solution and Rawal solution.
- nonwoven geotextile /
- unconfined uniaxial tensile strain /
- O95 /
- pore size distribution /
- analytical solution /
- dry sieving test

HTML全文

参考文献(18)

[1]	包承纲. 土工合成材料应用原理与工程实践[M]. 北京: 中国水利水电出版社, 2008. (BAO Cheng-gang. The principleand application of geosynthetics in engineering[M]. Beijing: China Water Power Press, 2008. (in Chinese))
[2]	土工合成材料工程应用手册编写委员会. 土工合成材料工程应用手册[M]. 北京: 中国建筑工业出版社, 2000. (Geosynthetics Engineering Application Manual Compilation Committee. Geosynthetics engineering application manual[M]. Beijing: China Architecture & Building Press, 2000. (in Chinese))
[3]	ROWE R K, MYLEVILLE B L J. Implications of adopting an allowable geosynthetic strain in estimating stability[C]// Proceedings of the Fourth International Conference on Geotextiles, Geomembranes and Related Products. Hague, 1990: 131-136.
[4]	TANG X W, TANG L, SHE W, et al. Prediction of pore size characteristics of woven slit-ﬁlm geotextiles subjected to tensile strains[J]. Geotextiles and Geomembranes, 2013, 38: 43-80.
[5]	唐琳, 唐晓武, 佘巍, 等. 单向拉伸对土工织物反滤性能影响的试验研究[J]. 岩土工程学报, 2013, 35(4): 785-788. (TANG Lin, TANG Xiao-wu, SHE Wei, GAO Bo-song. Influence of uniaxial tensile strain on filtration characteristics of geotextiles[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(4): 785-788. (in Chinese))
[6]	FOURIE A B, KUCHENA S M. The influence of tensile stresses on the filtration characteristics of geotextiles[J]. Geosynthetics International, 1995, 2(2): 455-471.
[7]	GIROUD J P, 吴昌瑜, 丁金华. 粒状滤层与土工织物滤层[C]// 全国第五届土工合成材料学术会议论文集. 宜昌, 2000: 62-151. (GIROUD J P, WU Chang-yu, DING Jin-hua. Particulate filter and geotextile filter[C]// The 5th Chinese Conference on Geosynthetics. Yichang, 2000: 62-151. (in Chinese))
[8]	佘巍, 唐晓武, 张泉芳. 无纺织物单向受拉时孔径变化研究[J]. 土木工程学报, 2011, 44(增刊2): 9-12. (SHE Wei, TANG Xiao-wu, ZHANG Quan-fang. The influence of uniaxial tensile strain on the equivalent opening sizes of nonwoven geotextiles[J]. China Civil Engineering Journal, 2011, 44(S2): 9-12. (in Chinese))
[9]	RAWAL A, PRIYADARSHI A. Tensile behavior of nonwoven structures: comparison with experimental restults[J]. Journal of Materials Science, 2010, 45(24): 6643-6652.
[10]	RAWAL A. Structural analysis of pore size distribution of nonwovens[J]. Journal of the Textile Institute, 2010, 101(4): 350-359.
[11]	RAWAL A, PRIYADARSHI A.Tensile behaviour of thermally bonded nonwoven structures: model description[J]. Journal of Materials Science, 2010, 45(9): 2274-2284.
[12]	RAWAL A, RAO P V K. Effect of fiber orientation on pore size characteristics of nonwowen structures[J]. Journal of Applied Polymer Scientists, 2010, 118(5): 2668-2673.
[13]	RAWAL A, AGRAHARI S K. Pore size characteristics of nonwoven structures under uniaxial tensile loading[J]. Journal of Materials Science, 2011, 46(13): 4487-4493.
[14]	AYDILEK A H, OGUZ S H, EDIL T B. Digital image analysis to determine pore opening size distribution of nonwoven geotextiles[J]. Journal of Computing in Civil engineering, 2002, 16(4): 280-290.
[15]	杨艳. 土工织物等效孔径测定方法的分析[D]. 天津: 天津大学, 2009. (YANG Yan. Analysis of methods to test equivalent opening size of Geotextiles[D]. Tianjin: Tianjin University, 2009. (in Chinese))
[16]	SL 235—2012 土工合成材料测试规程[S]. 2012. (SL 235—2012 Specification for test and measurement of geosynthetics[S]. 2012. (in Chinese))
[17]	EDWARDS M, HSUAN G. Permittivity of geotextiles with biaxial tensile loads[C]// 9th International Conference on Geosynthetics. Brazil, 2010: 1135-1140.
[18]	FAURE Y, GOURC J P, MILLOT F, et al. Theoretical and experimental determination of the filtration opening size[C]// Proceedings of the Third International Conference on Geotextiles. Vienna, 1986: 1275-1280.