CAJ | 학술논문

为了分析抽水井井底处不同粒径介质对抽水井周围水头高度的影响，基于Forchheimer 公式进行计算，并将数值计算的结果与所开展的相似模拟试验结果进行对比。结果表明：Forchheimer公式中表征非Darcy流的系数β主要受抽水井井底附近区域中砂粒尺寸的影响。由理论计算可得，4种不同直径（1.65～2.36 mm、0.83～1.65 mm、0.35～0.83 mm、0.25～0.35 mm）的砂粒在距井轴水平距离1 m处，压力水头的高度分别为36.02、34.95、33.94、29.84 m；由试验结果可得，在井底介质同取以上4组不同直径的砂粒时，0.1 m处测压管中水位的高度分别是0.450、0.439、0.424、0.413 m。随着砂粒直径的减小，压力水头高度也依次减小，离井底越近处，抽水井周围水流的非线性流动现象越明显。该结论对分析不同介质环境下抽水井周围水流的非线性渗流规律具有重要意义。
위료분석추수정정저처불동립경개질대추수정주위수두고도적영향，기우Forchheimer 공식진행계산，병장수치계산적결과여소개전적상사모의시험결과진행대비。결과표명：Forchheimer공식중표정비Darcy류적계수β주요수추수정정저부근구역중사립척촌적영향。유이론계산가득，4충불동직경（1.65～2.36 mm、0.83～1.65 mm、0.35～0.83 mm、0.25～0.35 mm）적사립재거정축수평거리1 m처，압력수두적고도분별위36.02、34.95、33.94、29.84 m；유시험결과가득，재정저개질동취이상4조불동직경적사립시，0.1 m처측압관중수위적고도분별시0.450、0.439、0.424、0.413 m。수착사립직경적감소，압력수두고도야의차감소，리정저월근처，추수정주위수류적비선성류동현상월명현。해결론대분석불동개질배경하추수정주위수류적비선성삼류규률구유중요의의。
In order to analyze the influence of nonlinear seepage with different medium near pum -ping well, Forchheimer equation was used for calculation and an experiment was carried out to verify the calculated results .The calculated results indicated that the coefficient βin Forchheimer equa-tion, which characterizes the nonlinear Darcy flow , mainly depends on the size of the grain at the bottom of the pumping well .When the distance from the well was 1 m, the water head height related to four different sizes of grains (1.65~2.36 mm, 0.83~1.65 mm, 0.35~0.83 mm and 0.25~0.35 mm) were 36.02 , 34.95 , 33.94 and 29.84 m respectively .Experimental results show that the water head height related to the grains (1.65~2.36 mm, 0.83~1.65 mm, 0.35~0.83 mm and 0.25~0.35 mm) were 0.450, 0.439, 0.424 and 0.413 m at 0.1 m of the piezometer, re-spectively .With the decrease of grain size , the water head height decreased accordingly .Nonlinear flow phenomenon is more obvious near the pumping wells .This conclusion could be of considerable help for understanding the nonlinear flow within the pumping well with different materials .