| 低温条件下塑料土工格栅拉伸特性的试验研究 |
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| 引用本文： | 汪恩良,徐学燕.低温条件下塑料土工格栅拉伸特性的试验研究[J].岩土力学,2008,29(6):1507-1511. |
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| 作者姓名： | 汪恩良 徐学燕 |
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| 作者单位： | 1. 哈尔滨工业大学 土木工程学院，哈尔滨 150090；2. 黑龙江省水利科学研究院 哈尔滨，150080 |
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| 摘 要： | 通过对塑料土工格栅在低温条件下的拉伸试验，得到拉伸屈服力、屈服伸长率、不同伸长率对应的拉伸力等数据，试验数据分析表明：（1）塑料土工格栅在低温状态下抗拉伸能力明显提高；（2）低温条件下，塑料土工格栅肋条截面积越大，拉伸力随温度降低而提高的幅度越大，屈服伸长率随温度的降低而下降的趋势越明显；反之，拉伸力受温度降低的影响逐渐减弱，屈服伸长率受温度降低的影响越小；（3）塑料土工格栅冻融循环后，与未冻融试样对照，拉伸特性没有降低。
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| 关 键 词： | 塑料土工格栅 低温 拉伸试验 拉伸特性 |
| 文章编号： | 1000-7598-(2008)06-1507-05 |
| 收稿时间： | 2006-10-23 |
| 修稿时间： | 2006年10月23 |
Experimental study on tensile characteristics of plastic geogrid under low temperature |
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| WANG En-liang,XU Xue-yan.Experimental study on tensile characteristics of plastic geogrid under low temperature[J].Rock and Soil Mechanics,2008,29(6):1507-1511. |
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| Authors: | WANG En-liang XU Xue-yan |
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| Institution: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Heilongjiang Provincial Hydraulic Research Institute, Harbin 150080, China |
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| Abstract: | The data of plastic geogrid such as yield stress, elongation of yield, tensile force relating to different tensile stretches etc., were obtained from the tensile test under low temperature. Through analyzing the test results, it is found that 1) The tensile characteristics of plastic geogrid enhance obviously under low temperature. 2) Under low temperature, the larger the cross-sectional area of ribbing is, the wider the increasing extent of tensile force is; while more obvious the decreasing trend of the elongation of yield. Contrarily, with the decreasing of the cross-section area of ribbing, the effect of temperature reducing on tensile force and elongation of yield is weakened gradually. 3) Compared with the unfrozen sample, the tensile characteristics change of the plastic geogrid suffered freeze-thaw cycling is not obvious. |
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| Keywords: | plastic geogrid low temperature tensile test tensile characteristics |
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