泥膜厚度对渗渠渗透系数的影响

Influence of Mud Film Thickness on Seepage Canal Permeability Coefficient

泥膜厚度是影响渗渠渗透系数的重要因素之一。独石化金沟河引水工程采用室内水工模型试验,得出泥膜厚度与渗透系数的关系曲线图,根据河流特点提出减小泥膜淤积厚度的建议,建议在渗管上设闸阀,在大洪水期时,可以关闭闸阀不取水,利用下渗水往上移动,对反滤料进行反冲洗,以提高反滤料的寿命,延长取水时间。

The mud film thickness is one of the important factors that have influence on seepage canal permeability coefficient.The laboratory hydraulic model test was conducted for construction of the Jingouhe river water diversion project and the mud film thickness-permeability coefficient relation curves were obtained from the model test.It is proposed to reduce the mud film thickness according to the river characteristics.Gate valves are recommended to be installed on the seepage pipes,which can be closed to stop water taking during large floods,driving lower seepage water to move upward to flush filter material so that the life of filter material and the time of taking water could both be extended.