Experimental study on the effect of temperature on HDPE geomembrane/geotextile interface shear characteristics

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL Geotextiles and Geomembranes Pub Date : 2023-12-28 DOI:10.1016/j.geotexmem.2023.12.005

Hai Lin, Xiangyu Gong, Yifan Zeng, Chuangbing Zhou

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Abstract

Geomembranes (GMBs) and geotextiles (GTXs) are the most widely used geosynthetics in landfills and other barrier systems. While various temperature environments may be encountered in practice, the interface shear characteristics of geosynthetics under different temperatures are still not clear. Shear tests of the interface between a high-density polyethylene GMB and nonwoven GTX are performed using a temperature-controlled submerged direct shear apparatus. The testing temperatures range from 10 °C to 70 °C, which covers most of the situations commonly encountered in engineering. The shear behaviors of the textured GMB/GTX interface and smooth GMB/GTX interface are presented, and the mechanism of the temperature influence is analyzed according to the test results and phenomena. Temperature has a significant impact on the GMB/GTX interface peak strength and post-peak strength, and maximum interface shear strength could be obtained when the temperature is approximately 30–40 °C. The influencing mechanisms of temperature on the GMB/GTX interface shear strength are thoroughly discussed. The shear characteristics of the GMB/GTX interface under different temperatures are critical to the stability analysis of geosynthetic slopes in special condition, and this study can also provide a reference for the effect of temperature on the shear behavior of other geosynthetics.

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温度对高密度聚乙烯土工膜/土工织物界面剪切特性影响的实验研究

土工膜（GMB）和土工织物（GTX）是垃圾填埋场和其他屏障系统中使用最广泛的土工合成材料。虽然在实际应用中可能会遇到各种温度环境，但土工合成材料在不同温度下的界面剪切特性仍不明确。我们使用温控浸没式直接剪切设备对高密度聚乙烯 GMB 和无纺布 GTX 之间的界面进行了剪切测试。测试温度范围为 10 °C 至 70 °C，涵盖了工程中常见的大多数情况。根据试验结果和现象分析了温度的影响机理，介绍了纹理 GMB/GTX 界面和光滑 GMB/GTX 界面的剪切行为。温度对 GMB/GTX 界面的峰值强度和后峰值强度有显著影响，当温度约为 30-40 ℃ 时可获得最大界面剪切强度。详细讨论了温度对 GMB/GTX 界面剪切强度的影响机制。不同温度下 GMB/GTX 界面的剪切特性对特殊条件下土工合成材料边坡的稳定性分析至关重要，本研究也可为温度对其他土工合成材料剪切行为的影响提供参考。

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.