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Advances in Materials Science and Engineering
Volume 2014, Article ID 184359, 9 pages
Research Article

Mechanical Behavior of Interface between Composite Geomembrane and Permeable Cushion Material

1State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
2College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

Received 28 July 2014; Accepted 26 September 2014; Published 22 October 2014

Academic Editor: Mohd Sapuan

Copyright © 2014 Haimin Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An accurate description of composite geomembrane-cushion interface behavior is of great importance for stress-deformation analysis and stability assessment of geomembrane surface barrier of rock-fill dam. A series of direct shear tests were conducted to investigate the friction behaviors of interfaces between composite geomembrane and two different permeable cushion materials (crushed stones and polyurethane mixed crushed stones). The shear stress-displacement relationships of the two interfaces show different characteristics and were described by the nonlinear-elastic model and nonlinear-elastic perfectly plastic model, respectively. Then the two models were implemented into the Fast Lagrangian Analysis of Continua in Three Dimensions () procedure correctly. By verification of a numerical example, numerical calculation results showed a good agreement with the theoretical solutions and test results.