高心墙堆石坝库水位骤降非稳定渗流计算分析
首发时间:2008-10-17
摘要:超高心墙堆石坝在库水位骤降时,由于库水位降落较快,当放水完成时,心墙内仍保持较高的孔隙水压力。这种孔隙水压力,恰是导致许多工程失事的直接原因。本文将采用多孔介质的非稳定饱和-非饱和渗流理论,以及固定网格的三维有限元方法,对某一超高心墙堆石坝心墙的非稳定渗流场特性以及孔隙水压力问题进行研究,为大坝安全运行提供依据。
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Unsteady seepage analysis of sudden drawdown for high rock-fill dam
Abstract:When the speed of sudden drawdown is so quick that the pore pressure in the clay core wall of the high rock-fill dam remains high .The high pore pressure is the direct cause of some accident .In this article ,by using unstable saturated-unsaturated seepage theory and the fixed mesh 3-D FEM, analyzed the unstable saturated-unsaturated seepage field and the high pore pressure in the clay core wall of the high rock-fill dam, in order to provide a basis for the safe operation of the dam.
Keywords: high rock-fill dam unstable seepage water release from reservoir pore pressure
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