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Volume 38 Issue 9
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LIN Hai, ZHANG Ling-ling, RUAN Xiao-bo, LIU Xiao-wen. Simple-shear failure characteristics of hydrated needle-punched GCL+GM composite liner[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(9): 1660-1667. DOI: 10.11779/CJGE201609013
Citation: LIN Hai, ZHANG Ling-ling, RUAN Xiao-bo, LIU Xiao-wen. Simple-shear failure characteristics of hydrated needle-punched GCL+GM composite liner[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(9): 1660-1667. DOI: 10.11779/CJGE201609013
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Simple-shear failure characteristics of hydrated needle-punched GCL+GM composite liner

  • 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;
    4. School of Transportation Engineering, Hefei University of Technology, Hefei 230009, China

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  • Received Date: September 29, 2015
  • Published Date: September 24, 2016
    Graphical Abstract
    • Abstract
  • Needle-punched GCL and HDPE geomembrane are widely used in landfill impermeable liner. The internal shear strength of GCL and shear strength of GCL/GM interface are the key factors influencing the slope stability of landfill composite liner. Large-scale simple-shear tests on hydrated needle-punched GCL+GM composite liner are conducted without forcing the shear failure to occur along a pre-determined plane. The development patterns of displacement of GCL/GM interface and internal displacement of GCL are obtained. The peak shear strengths of composite liner when the rough side of GM contacts respectively with the woven geotextile side and the nonwoven geotextile side of GCL are analyzed. The overall shear failure characteristics of hydrated needle-punched GCL+GM composite liner are revealed. The test results show that the large-scale simple-shear tests can correctly and reasonably simulate interactions of GCL and GM. The ultimate failure surface may change with the increase of normal stress, even there may exist a critical state in which both GCL internal surface and GCL/GM interface are the ultimate failure surfaces.
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    • References (16)
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