Smart Structures and Systems

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Two-dimensional deformation measurement in the centrifuge model test using particle image velocimetry

  • Li, J.C. (Center for Hypergravity Experimental and Interdisciplinary Research) ;
  • Zhu, B. (Center for Hypergravity Experimental and Interdisciplinary Research) ;
  • Ye, X.W. (MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering) ;
  • Liu, T.W. (MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering) ;
  • Chen, Y.M. (Center for Hypergravity Experimental and Interdisciplinary Research)
  • Received : 2019.05.26
  • Accepted : 2019.08.21
  • Published : 2019.12.25
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Abstract

The centrifuge model test is usually used for two-dimensional deformation and instability study of the soil slopes. As a typical loose slope, the municipal solid waste (MSW) landfill is easy to slide with large deformation, under high water levels or large earthquakes. A series of centrifuge model tests of landfill slide induced by rising water level and earthquake were carried out. The particle image velocimetry (PIV), laser displacement transducer (LDT) and marker tracer (MT) methods were used to measure the deformation of the landfill under different centrifugal accelerations, water levels and earthquake magnitudes. The PIV method realized the observation of continuous deformation of the landfill model, and its results were consistent with those by LDT, which had higher precision than the MT method. The deformation of the landfill was mainly vertically downward and increased linearly with the rising centrifugal acceleration. When the water level rose, the horizontal deformation of the landfill developed gradually due to the seepage, and a global slide surface formed when the critical water level was reached. The seismic deformation of the landfill was mainly vertical at a low water level, but significant horizontal deformation occurred under a high water level. The results of the tests and analyses verified the applicability of PIV in the two-dimensional deformation measurement in the centrifuge model tests of the MSW landfill, and provide an important basis for revealing the instability mechanism of landfills under extreme hydraulic and seismic conditions.

Keywords

Acknowledgement

Supported by : National Science Foundation of China, Zhejiang Provincial Natural Science Foundation of China, Central Universities of China

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