摘要
Abstract
The establishment of measuring weir can make an accurate early warning for abnormal working con-dition of the dam of the Pubugou Hydropower Station,however,the economic costs can increase significantly as the depth of the measuring weir impermeable wall.Therefore,exploring a suitable suspended cut-off wall pro-gram can not only make the measuring weir achieve the early warning function but also reduce the investment costs.The study shows that the working condition of the measuring weir depends on two main factors:the difference between the weir top elevation and the downstream water level,and the depth of the cut-off wall.The hydrogeological zoning and the range of the permeability coefficient of the Pubugou Dam foundation over-burden and the mountains on both sides of the river were determined in the range through field survey data.The depth of the impermeable wall of the measuring weir,the water blocking effect of the weir top elevation,and the economic benefits were compared comprehensively.Eventually,the construction program was deter-mined to be the weir top elevation of 674m,and the bottom of the seepage control wall was 10m deep below the original riverbed ground line.关键词
瀑布沟水电站/三维渗流模型/量水堰防渗墙方案比选Key words
Pubugou Hydropower Station/Three-dimensional seepage model/Cut-off wall scheme selection of the measuring weir分类
建筑与水利
