JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2015, Vol. 32 ›› Issue (8): 61-64.DOI: 10.3969/j.issn.1001-5485.2015.08.011

• ROCK SOIL ENGINEERING • Previous Articles     Next Articles

Shear Properties of GM/GCL Interface under Multilevel Loading

XU Tian-jie1,LIU Bin-yun1,2,LI Wei-chao3,CAI Hong3   

  1. 1.College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124,China;
    2.Beijing Key Lab of Water Quality Science and Water Environmental Restoration, Beijing University of Technology, Beijing 100124,China;
    3.Department of Geotechnical Engineering,China Institute of Water Resources and Hydropower,Beijing 100037,China
  • Received:2014-03-12 Online:2015-08-20 Published:2015-08-18

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Abstract: As an impermeable material, geomembrane (GM) has been widely used in engineering and environmental fields, but the damage during construction will reduce its shear strength. In view of this we conducted multilevel loading and direct shear tests on GM/GCL (geosynthetic clay liner) interfaces using a large size direct shear apparatus. Results show that the peak shear strength under multilevel loading is much lower than that under direct shear, and obvious strain softening of the interface occurs under both shear modes; the peak shear strength and residual strength under multilevel loading are close to those under direct shear when the normal stress is from 7.1 to 52.1kPa; repeated shearing under large normal stress has great damage on geomembrane which leads to a loss of 7.05 ° in terms of peak friction angle and 3.09 ° in terms of residual friction angle when the normal stress is greater than 102.1kPa under multilevel loading.

Key words: geomembrane, GCL, multilevel loading, shear strength, strain softening

CLC Number: 

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