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Volume 40 Issue S2
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LU Bin, XIE Xing-hua, WU Shi-qiang, WU Wei-xing, DA Ming-chang, GONG Yan. Unsteady seepage analysis of super-high core wall dams using 3D finite element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 73-76. DOI: 10.11779/CJGE2018S2015
Citation: LU Bin, XIE Xing-hua, WU Shi-qiang, WU Wei-xing, DA Ming-chang, GONG Yan. Unsteady seepage analysis of super-high core wall dams using 3D finite element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 73-76. DOI: 10.11779/CJGE2018S2015
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Unsteady seepage analysis of super-high core wall dams using 3D finite element method

  • 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;
    2. Power China Guiyang Engineering Corporation Limited, Guiyang 550081, China;
    3. Department of Water Resources of Qinghai Province, Xi'ning 810001, China

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  • Received Date: July 21, 2018
  • Published Date: October 29, 2018
    Graphical Abstract
    • Abstract
  • The processes of reservoir impoundment and emptying have important impact on seepage safety of earth-rock dams. The seepage control is one of the key technical problems for 300 m-level super-high core wall dams. To investigate the effect of change rate of water level on the seepage stability of dams, a three-dimensional (3D) finite element model for a 300 m-level gravel-soil core wall rock-fill dam is established. The seepage processes of reservoir impoundment and emptying are simulated, and the change of seepage surface and seepage gradient of core wall are analyzed. The simulated results show that the seepage surface has a steep drop in the core wall and continues to develop from the upstream to the downstream when the water level rises during the impoundment. The faster the water level rises, the steeper the seepage surface in the core wall. When the reservoir is be emptying, the seepage surface in the core wall lags behind with the reservoir water level, and the free surface has convex shape. The faster the water level drops, the greater the difference of the convex seepage surface forms in the core wall.
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    • References (7)
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