SEEPAGE CHARACTERISTICS OF A BUTTRESSED EMBANKMENT WITH A LOW PERMEABLE FOUNDATION: CENTRIFUGE AND NUMERICAL STUDIES

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The importance of levee stability is increasingly being recognized due to critical failures of river embankments and levees worldwide. On the basis of centrifuge tests and numerical analysis, this study presents seepage characteristics of embankments with buttressed slopes on low permeable, thick clay foundations. Two models of embankments having reinforcement placed on opposite slopes and constructed on a low permeable foundation were designed for centrifuge tests. Seepage centrifuge tests were performed at a high water level and beyond a high water level. Seepage characteristics of the embankment and foundation were analyzed by means of embedded pore water transducers. Moreover, numerical analysis results under various conditions simulated by SEEP/W were compared with the test results. Safety factors simulated by SLOPE/W were also compared with both models under the same water levels. The results show that the low permeable foundation above groundwater level presented a high degree of saturation before submerging, and the riverside buttressed slope embankment is safer than the land-side buttressed slope embankment. The conditions of the foundation and the reinforcement direction of the embankment should be considered when the seepage behavior and stability of an embankment are determined.
Publisher
AMER SOC AGRICULTURAL & BIOLOGICAL ENGINEERS
Issue Date
2014
Language
English
Article Type
Article
Keywords

GEOTECHNICAL CENTRIFUGE

Citation

TRANSACTIONS OF THE ASABE, v.57, no.2, pp.463 - 477

ISSN
2151-0032
URI
http://hdl.handle.net/10203/189185
Appears in Collection
CE-Journal Papers(저널논문)
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