Seismic stability and permanent displacement of landfill along liners |
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Authors: | YunMin Chen Deng Gao Bin Zhu and RenPeng Chen |
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Affiliation: | (1) MOE Key Laboratory of Soft Solis and Geoenvironmental Engineering, Zhejiang University, Hangzhou, 310027, China |
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Abstract: | The three-part wedge limit equilibrium method for seismic stability analysis of the landfill along liners is presented. The
approximate solutions of the factor of safety and the yield acceleration coefficient are obtained. Parametric studies show
that the interface strength of liners, the shear strength of waste and the height of retaining wall can influence the seismic
stability of landfill along liners. The density and the shear wave velocity of the field waste are obtained by the borehole
investigation and the spectral analysis of surface wave (SASW), respectively. The strain-dependent shear modulus and damping
ratio of the artifical waste are obtained by the moderate-scale dynamic triaxial tests. The one-dimensional (1D) equivalent
linear dynamic response analysis is used to calculate the horizontal equivalent seismic coefficient-time history of the sliding
landfill during earthquake. The seismic permanent displacement of the landfill along liners with different site conditons
and heights is evaluated by the Newmark method. The catculated results show that ratio of k
y/k
max, site conditions, the amplitude and frequency content of the bedrock motion can affect the seismic permanent displacement
of the landfill along liners in some degree. Finally, the seismic stability and permanent displacements of three expanded
configurations of a certain landfill case are analyzed.
Supported by the National Natural Science Foundation (Grant No: 50538080) and National Distinguished Young Scientist Foundation
of China (Grant No: 50425825) |
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Keywords: | landfill liner seismic stability permanent displacement Newmark method |
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