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用图像分析法研究有纺土工织物单向受拉时孔径的变化

佘巍, 唐晓武

佘巍, 唐晓武. 用图像分析法研究有纺土工织物单向受拉时孔径的变化[J]. 岩土工程学报, 2012, 34(8): 1522-1526.
引用本文: 佘巍, 唐晓武. 用图像分析法研究有纺土工织物单向受拉时孔径的变化[J]. 岩土工程学报, 2012, 34(8): 1522-1526.
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SHE Wei, TANG Xiao-wu. Change of pore size of woven geotextiles affected by uniaxial tension using image analysis method[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1522-1526.
Citation: SHE Wei, TANG Xiao-wu. Change of pore size of woven geotextiles affected by uniaxial tension using image analysis method[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1522-1526.
shu

用图像分析法研究有纺土工织物单向受拉时孔径的变化  English Version

  • 1.浙江大学软弱土与环境土工教育部重点实验室，浙江 杭州 310058；2.武汉经济技术开发区规划土地局，湖北 武汉 430056

基金项目: 浙江省重大科技专项重点社会发展项目（2009C03008-1）；中铁二院工程集团有限责任公司科研项目分项目（科2011-29）
详细信息
    作者简介:

    佘 巍(1982– )，男，湖北公安人，博士研究生，主要从事环境岩土工程与土工合成材料应用方面的研究。

  • 中图分类号: TU47

Change of pore size of woven geotextiles affected by uniaxial tension using image analysis method

  • (1. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou 310058, China; 2. Wuhan Economic&Technological Development Zone Land Planning Bureau, Wuhan 430056, China)

摘要

    摘要
  • 摘要: 现有反滤设计中保土准则使用土工织物未受拉时的等效孔径，但平面单向拉伸会导致该值变化，变大则不满足保土准则，变小则不满足透水准则及淤堵准则。有纺织物孔径由孔径分布曲线和特征孔径反映，采用数字图像分析法对两种有纺土工织物单向受拉时孔径变化进行精确测定。有纺织物被单向张拉至3%，6%，9%和12%的平面应变，随着拉应变的增加，两种有纺土工织物开孔面积率增大；孔径分布曲线向孔径大的方向移动；3种特征孔径值（O30，O50和O95）增大，其变化率都与拉应变呈近似线性关系，且小孔径部分相对于大孔径部分随拉伸应变的增长而增大较快。
    Abstract: The equivalent opening size tested under unstrained condition is used in the current retention criterion for design of geotextile filters. However, the equivalent opening size can be influenced by in-plane uniaxial tensile strain. The retention criterion cannot be satisfied when it gets larger, and the permeability criterion and the clogging criterion cannot be satisfied when it gets smaller.The opening size of woven geotextiles can be featured by the pore size distribution and characteristic opening sizes. The opening sizes of two uniaxially stretched woven geotextiles are measured accurately by means of the digital image analysis. The in-plane uniaxial tensile strains of the woven geotextiles are increased to 3%, 6%, 9% and 12%. The percent open areas of the woven geotextiles and three characteristic opening sizes (i.e., O30, O50 and O95) increase with the increase of the tensile strains. Accordingly, the pore size distributions shift to the direction of the larger open sizes. The change rates of characteristic opening sizes approximately linearly increase with the increase of the tensile strains, and smaller characteristic opening sizes have larger increase with the increase of the tensile strains.
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    • 参考文献(9)
  • [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 principle and application of geosynthetics in engineering[M]. Beijing: China Water Power Press, 2008. (in Chinese))
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    [7] 李富强, 王 钊, 陈 轮, 等. 用数字图像技术测定反滤材料孔径分布曲线[J]. 岩土工程学报, 2007, 29(6): 857–860. (LI Fu-qiang, WANG Zhao, CHEN Lun, et al. Digital image analysis to determine pore size distribution of filtration materials[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(6): 857–860. (in Chinese))
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出版历程
  • 收稿日期:  2011-03-08
  • 发布日期:  2012-08-19

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