| 无纺织物单向受拉时孔径变化研究 |
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| 引用本文： | 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(Z2):9-12. |
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| 作者姓名： | 佘巍 唐晓武 张泉芳 |
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| 作者单位： | 浙江大学软弱土与环境土工教育部重点实验室; |
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| 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(科2011-29) |
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| 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,影响土工织物反滤性能。采用动力水筛法对三种无纺土工织物单向受拉时等效孔径变化进行测定。无纺织物被单向张拉至3%、5%和10%的平面应变,随着拉应变的增加,三种针刺无纺土工织物等效孔径减小。推求了无纺织物单向张拉时的等效孔径计算公式,对于较厚无纺织物,公式计算值和测试值较吻合,但对于较薄无纺织物,二值有一定差异。
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| 关 键 词： | 无纺土工织物 单向拉应变 动力水筛法 等效孔径 孔径计算公式 |
The influence of uniaxial tensile strain on the equivalent opening sizes of nonwoven geotextiles |
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| She Wei Tang Xiaowu Zhang Quanfang.The influence of uniaxial tensile strain on the equivalent opening sizes of nonwoven geotextiles[J].China Civil Engineering Journal,2011(Z2):9-12. |
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| Authors: | She Wei Tang Xiaowu Zhang Quanfang |
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| Affiliation: | She Wei Tang Xiaowu Zhang Quanfang (Key Laboratory of Soft Soils and Geoenvironmental Engineering of the Ministry of Education,Zhejiang University,Hangzhou 310058,China) |
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| Abstract: | The equivalent opening size tested under unstrained condition is used in the current retention criterion of geotextile filter design.However,the equivalent opening size can be influenced by in-plane uniaxial tensile strain,and then the filtration functions of geotextiles will be affected.The opening sizes of three uniaxially stretched nonwoven geotextiles have been measured by Hydrodynamic Sieving Method.The in-plane uniaxial tensile strains of the nonwoven geotextiles were increased to 3%,5% and 10%.The eq... |
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| Keywords: | nonwoven geotextile uniaxial tensile strain Hydrodynamic Sieving Method equivalent opening size |
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