Effect of hydration state on shear strength of composite liner with needle-punched GCL
LIN Hai1, 2, ZHANG Ling-ling3
1. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China; 2. Key Laboratory of Geomechanics and Embankment Engineering of the Ministry of Education, Hohai University, Nanjing 210098, China; 3. Department of Architectural Engineering, Jiangxi V&T College of Communication, Nanchang 330013, China;
Abstract：Needle-punched GCL and HDPE geomembrane (GM) are widely used in impermeable engineering, and the whole shear strength of multi-layer composite liner with GCL is crucial for the slope stability. A large simple-shear testing method for composite liner with needle-punched GCL is introduced, and the whole peak shear strength of composite liner with dry GCL is compared with that with GCL in hydration state. The results show that the shear failure of composite liner does not occur at the dry GCL internal face. The shear strength of composite liner with dry GCL is not always larger than that with hydrated GCL. Combined with the shear failure mechanism of composite liner with GCL, the influence of GCL hydration state is illustrated for the shear strength of composite liner. The translational interface stability of composite liner with GCL in different hydration states should draw engineers’ attention.
林海,章玲玲. 水化状态对含针刺GCL复合衬里抗剪强度的影响分析[J]. 岩土工程学报, 2017, 39(s1): 219-223.
LIN Hai, ZHANG Ling-ling. Effect of hydration state on shear strength of composite liner with needle-punched GCL. Chinese J. Geot. Eng., 2017, 39(s1): 219-223.
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