泥膜厚度对渗渠渗透系数的影响
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摘要
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.
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.
引文
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[2]?阁士勤,牛富敏,翟建,等.中条山供水工程渗渠设计研究[J].人民黄河,2001,23(4):13-14.
[3]刘持峰,刘焕芳,程琨,等.渗管长度对渗渠产水量的影响[J].人民黄河,?2008,39(2):30-32.
[4]?程琨,刘焕芳,吕宏兴,等.渗渠取水量变化过程初步分析[J].中国农村水利水电,?2007,39(8):39-44.
[5]刘持峰,刘焕芳,程琨,等.河床床面冲淤变化对渗渠产水量的影响[J].水资源与水工程学报[J],?2007,?18(3):10-13.
[6]时伯华,王惠.渗管在临沂城引水工程中的应用[J].水利水电科技进展,?2000,20(5):58-59.
[7]刘焕芳,程琨,吕宏兴.渗渠取水压力变化过程分析[J].西北农林科技大学学报,?2007,?35(8):211-216.
[8]邓方霞.渗渠取水的建议与计算[J].甘肃水利水电技术,2002,?38(1):36-38.