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Influence of Physical and Mechanical Properties of Overlying Filler on Shear Strength Characteristics of Composite Liner Interface
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Guihua YANG1, Xiangchun WANG2, Jianqing HE2, Qiunan CHEN2, Junwei LI3
Mining and Metallurgical Engineering | 2024, 44(1) : 16 - 20
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Mining and Metallurgical Engineering | 2024, 44(1): 16-20
• MINING •
Influence of Physical and Mechanical Properties of Overlying Filler on Shear Strength Characteristics of Composite Liner Interface
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Guihua YANG1, Xiangchun WANG2, Jianqing HE2, Qiunan CHEN2, Junwei LI3
Affiliations
  • 1.Geological Survey Institute of Hunan Province, Changsha 410014, Hunan, China
  • 2.Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411100, Hunan, China
  • 3.Natural Resources Survey Institute of Hunan Province, Changsha 410014, Hunan, China
Published: 2024-02-01 doi: 10.3969/j.issn.0253-6099.2024.01.004
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The influences of physical and mechanical properties of overlying filler on the shear strength characteristics of composite liner interface were studied by adopting a modified ZLB-1 triple rheological direct shear apparatus, and shear stress-strain curves of overlying filler under different normal stresses were obtained. The experimental results show that both clay and sand present displacement softening behavior, which becomes more obvious with the increase of sand content. Among the interface of composite liners, the interface between geomembrane and sodium bentonite pad has the lowest friction coefficient, and the friction coefficient in saturated state is significantly lower than that in the unsaturated state. As the sand content increases, the pseudo-cohesion between the interface of composite liner decreases, while the pseudo-friction angle initially decreases, and then increases followed by another decrease. As the water content increases, both the pseudo-cohesion and pseudo-friction angle decrease after an initial increase.

overlay  /  filler  /  direct shear instrument  /  liner material  /  anti-seepage material  /  interface friction coefficient
Guihua YANG, Xiangchun WANG, Jianqing HE, Qiunan CHEN, Junwei LI. Influence of Physical and Mechanical Properties of Overlying Filler on Shear Strength Characteristics of Composite Liner Interface[J]. Mining and Metallurgical Engineering, 2024 , 44 (1) : 16 -20 . DOI: 10.3969/j.issn.0253-6099.2024.01.004
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doi: 10.3969/j.issn.0253-6099.2024.01.004
  • Receive Date：2023-08-23
  • Online Date：2026-03-20
  • Published：2024-02-01
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  • Received：2023-08-23
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Affiliations
    1.Geological Survey Institute of Hunan Province, Changsha 410014, Hunan, China
    2.Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411100, Hunan, China
    3.Natural Resources Survey Institute of Hunan Province, Changsha 410014, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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