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Studv on Distribution Mechanism of Percolation Pressure of Gravity Dam Bottom
Author(s): 
Pages: 71-73
Year: Issue:  9
Journal: YELLOW RIVER

Keyword:  重力坝坝基渗流场渗透压力;
Abstract: 基于重力坝坝基渗流压力水头与渗流流速的微分关系,导出渗流压力水头控制偏微分方程,从而得出混凝土重力坝坝底扬压力分布规律:重力坝坝底面的渗透压力分布形状由坝基岩的渗透系数和渗流沿坝底的水平向流速的变化率确定.坝底面渗流水头曲线在某点向下游变化趋势的弯曲方向,与该点渗流向下游的水平向流速变化率的正负相反;渗流沿坝底面某微段作用水头的改变量,与该微段渗流向下游的水平向流速平均变化率成正比,与水平向渗透系数的大小成反比.
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