| 糙面土工膜与无纺土工织物界面剪切强度及表面粗糙度变化规律 |
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| 引用本文： | 施建勇,李砚.糙面土工膜与无纺土工织物界面剪切强度及表面粗糙度变化规律[J].河海大学学报(自然科学版),2016,44(3):214-218. |
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| 作者姓名： | 施建勇 李砚 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098; 河海大学岩土工程科学研究所, 江苏 南京 210098,河海大学岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098; 河海大学岩土工程科学研究所, 江苏 南京 210098 |
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| 基金项目： | 国家自然科学基金(41172234)；高等学校博士学科点专项科研基金(20130094110002) |
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| 摘 要： | 为了量化糙面土工膜表面粗糙度变化规律,研制了表面粗糙度测量仪,并进行了不同法向应力下糙面土工膜和无纺土工织物界面剪切和对应的糙面土工膜表面粗糙度试验。研究表明,糙面土工膜和无纺土工织物界面剪切强度是由糙面土工膜粗糙凸起和无纺土工织物纤维相互嵌入和拉拽作用产生的,界面的剪切峰值摩擦系数主要受到法向应力的影响,界面强度发展到残余强度,糙面土工膜粗糙凸起磨损趋于稳定,无纺土工织物纤维定向排列完成。
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| 关 键 词： | 界面剪切强度 粗糙度 糙面土工膜 土工织物 纤维 |
| 收稿时间： | 2015/8/8 0:00:00 |
Interface shear strength of textured geomembrane with nonwoven geotextile and change pattern of surface asperity |
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| SHI Jianyong and LI Yan.Interface shear strength of textured geomembrane with nonwoven geotextile and change pattern of surface asperity[J].Journal of Hohai University (Natural Sciences ),2016,44(3):214-218. |
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| Authors: | SHI Jianyong and LI Yan |
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| Affiliation: | Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; Geotechnical Research Institute, Hohai University, Nanjing 210098, China and Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; Geotechnical Research Institute, Hohai University, Nanjing 210098, China |
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| Abstract: | In order to quantitatively investigate the pattern of change of the surface asperity of textured geomembrane, a new apparatus for measuring surface asperity was developed. Interface shear tests of textured geomembrane with nonwoven geotextile under different normal stresses and corresponding tests on the surface asperity of textured geomembrane were conducted. The results show that the interface shear strength of textured geomembrane with nonwoven geotextile is caused by the embedding and pulling actions between textured points of geomembrane and geotextile fabric. The peak interface shear friction coefficient is mainly influenced by normal stress. When the interface shear strength tends to be residual strength, the damage to textured points of geomembrane tends to be stable and the fabric orientation of geotextile is fully achieved. |
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| Keywords: | interface shear strength asperity textured geomembrane geotextile fabric |
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