JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2016, Vol. 33 ›› Issue (4): 86-90.DOI: 10.11988/ckyyb.20150060

• ROCK-SOIL ENGINEERING • Previous Articles     Next Articles

Influence of Water Level Fluctuation on the HorizontalDisplacement of Core Wall of Rockfill Dam

ZHAO Bo-chao, YIN Qi, DENG Gang, WANG Xiao-gang   

  1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research, Beijing 100038, China
  • Received:2015-01-16 Published:2016-04-01 Online:2016-04-08

Abstract: The core wall of earth-rockfill dam is considered as a vertical cantilever beam, the upstream side of which is controlled by the pockety earth pressure of the upstream shell and the time-varying water pressure, and the downstream side is also controlled by the corresponding earth pressure of the downstream shell and the water pressure similarly. When the reservoir water level rises and the core wall has a tendency to turn to the downstream side, the upstream earth pressure gradually decreases and the downstream earth pressure gradually increases. Once the earth pressure on both sides reaches the limit active and passive earth pressure respectively, slippage is likely to take place, and the core wall deflection at this time is defined as the safe deflection fs. If the measured actual lateral displacement of the core wall is larger than fs, we can roughly determine that relative sliding of the soil on both sides of core wall exists, which may generate local longitudinal crack. The research result can be applied directly to the calculation of horizontal deformation and safety assessment for concrete core wall of similar conditions.

Key words: rock-fill dam, water level fluctuation, active earth pressure, passive earth pressure, deflection of core wall, longitudinal crack

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