| 土工合成材料界面作用特性的拉拔试验研究 |
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| 引用本文： | 吴景海.土工合成材料界面作用特性的拉拔试验研究[J].岩土力学,2006,27(4):581-585. |
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| 作者姓名： | 吴景海 |
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| 作者单位： | 天津市市政工程研究院,天津,300074 |
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| 摘 要： | 在土工合成材料加筋土工程中，土工合成材料与填料的界面作用特性是最关键的技术指标，因此利用拉拔试验研究土工合成材料与填料的界面作用特性是非常必要的。以5种不同种类的国产土工合成材料为加筋材料，以砂和石灰粉煤灰为填料，比较了各种土工合成材料与填料的界面作用特性，试验表明:（1）石灰粉煤灰自重较轻，摩擦角高，并且比砂的拉拔系数相对偏高一倍左右，是理想的土工合成材料加筋土工程的填料；（2）土工合成材料的拉拔系数从高到低排序为涤纶纤维经编土工格栅最高，塑料拉伸土工格栅次之，土工网较低，土工织物最低；（3）不同填料、不同土工合成材料的拉拔系数相差较大，具体加筋土工程采用的拉拔系数需要通过拉拔试验确定。这些结论可指导土工合成材料的优选和研究加筋机理。
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| 关 键 词： | 界面作用特性 土工合成材料 砂 石灰粉煤灰 拉拔试验 |
| 文章编号： | 1000-7598-（2006）04-0581-05 |
| 收稿时间： | 2004-08-25 |
| 修稿时间： | 2004-10-26 |
Study on interaction characteristics between geosynthetics and fill materials by pull out tests |
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| WU Jing-hai.Study on interaction characteristics between geosynthetics and fill materials by pull out tests[J].Rock and Soil Mechanics,2006,27(4):581-585. |
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| Authors: | WU Jing-hai |
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| Institution: | Tianjin Municipal Engineering Research Institute, Tianjin 300074, China |
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| Abstract: | The interaction characteristics of geosynthetics with fill materials are the key factors for geosynthetic reinforcement projects;hence,it is essential to study interaction characteristics by pull out tests.The comprehensive investigation into the interaction characteristics of 5 kinds of domestic geosynthetics with sand and lime fly ash was presented by pull out tests.Experimental results show:(1) Lime fly ash is light in unit weight,high in shear strength and its pull out coefficient(Cpo);therefore,it is ideal fill material;(2) Geosynthetics are arranged in Cpo from high to low: polyester(PET)warp knitting geogrids,uniaxial/biaxial oriented geogrids,geonets and geotextiles;(3) The variation of Cpo for various geosynthetics and fill materials is larger,hence Cpo should be determined through pull out tests for concrete projects.These conclusions can be used to guide choosing geosynthetic type and to make research on geosynthetic reinforcement mechanism. |
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| Keywords: | interaction characteristics geosynthetics sand lime fly ash pull out test |
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