The objective of this study was to evaluate the effect of temperature on the shear behavior and critical strength of composite systems comprising of a geosynthetic clay liner (GCL) and textured geomembrane (GMX). For this purpose, displacement-controlled internal and interface direct shear tests were performed at both room temperature (≈20 °C) and an elevated temperature of 80 °C on three GCL/GMX composite systems at normal stresses varying from 100 kPa to 2000 kPa. An increase in the test temperature resulted in peak shear strength reduction up to 45% in GCL internal shear tests and up to 46% in GCL-GMX interface shear tests. The large-displacement shear strength at the elevated temperature was also reduced by up to 32% in GCL internal shear tests and up to 48% in GCL-GMX interface shear tests.

本研究的目的是评估温度对由土工合成粘土衬垫(GCL) 和纹理土工膜 (GMX)组成的复合系统的剪切行为和临界强度的影响。为此，在室温（约 20 °C）和 80 °C 高温下，对三个 GCL/GMX 复合材料系统在 100 kPa 至 2000 kPa 的法向应力下进行了位移控制的内部和界面直剪测试。测试温度的升高导致 GCL 内部剪切测试中的峰值剪切强度降低高达 45%，GCL-GMX 界面剪切测试中的峰值剪切强度降低高达 46%。在GCL内部剪切测试中，高温下的大位移剪切强度也降低了高达32%，在GCL-GMX界面剪切测试中降低了高达48%。