大口径塑料井管开孔率与水力特性的关系研究
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摘要
灌溉用大口径塑料井管的应用受试验研究滞后制约,致使至今未能被推广应用。选择开孔率分别为1.54%,3.09%,5.83%,8.75%,11.06%,14.24%,16.52%,21.38%和26.24%的井管,对大口径塑料井管的水力学特性进行试验研究,分析其开孔率大小与出水量、水跃等水力学特性的关系。结果表明:从流量因素分析,开孔率的适宜范围为5.83%~14.24%;从水跃因素分析,开孔率应不小于8.75%;综合流量和水跃的实验结果,Φ300 mm、厚9.82 mm的光壁管,在细砂含水层、滤料为中粗砂的情况下,适宜开孔率大小为8.75%~14.24%。
For the reason of backward research,the application of large- caliber plastic well tubes for irrigation has been restricted. The relationships between opening ratio of large- caliber plastic well tube and water yield amount,water jump etc. were studied by selecting the opening ratio of 1. 54%,3. 09%,5. 83%,8. 75%,11. 06%,14. 24%,16. 52%,21. 38%,26.24%. The results indicated that the opening ratio of large- caliber plastic well tube should be 5. 83% ~ 14. 24% in the view of water yield amount and larger than 8. 75% in the view of water jump; by comprehensively considering the test results of water yield amount and water jump,the suitable opening ratio of 8. 75% ~14. 24% for smooth- wall pipe with diameter of 300 mm and thickness of 9. 82 mm,is recommended in the case of fine sand aquifer with a filter of coarse sand.
For the reason of backward research,the application of large- caliber plastic well tubes for irrigation has been restricted. The relationships between opening ratio of large- caliber plastic well tube and water yield amount,water jump etc. were studied by selecting the opening ratio of 1. 54%,3. 09%,5. 83%,8. 75%,11. 06%,14. 24%,16. 52%,21. 38%,26.24%. The results indicated that the opening ratio of large- caliber plastic well tube should be 5. 83% ~ 14. 24% in the view of water yield amount and larger than 8. 75% in the view of water jump; by comprehensively considering the test results of water yield amount and water jump,the suitable opening ratio of 8. 75% ~14. 24% for smooth- wall pipe with diameter of 300 mm and thickness of 9. 82 mm,is recommended in the case of fine sand aquifer with a filter of coarse sand.
引文
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[16]Mohamed A,Rushton K.Horizontal wells in shallow aquifers:field experiment and numerical model[J].Journal of Hydrology,2006,329:98-109.
[17]郭雷,张宗孝,马斌,等.竖井溢洪道水力特性试验研究[J].人民长江,2007,38(6):110-112.
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[2]Slowik V,Saouma V E.Water pressure in propagating concrete cracks[J].Journal of Structural Engineering,2000,126(2):235-242.
[3]H Yurdem,V Demir,A Degirmencioglu.Development of a mathematical model to predict headlosses from disc filters in drip irrigation systems using dimensional analysis[J].Biosystems Engineering,2008,130(3):25-30.
[4]Renard P.The future of hydraulic tests[J].Hydrogeology Journal,2005,13(1):259-262.
[5]Carrera J,Alcolea A,Medina A et al.Inverse problem in hydrogeology[J].Hydrogeology Journal,2005,13(1):206-222.
[6]Ravina E,Paz Z,Sofer et al.Control of clogging in drip irrigation with stored treated municipal sewage effluent[J].Agricultural Water Management,1997,352(3):56-60.
[7]李宗利,王纪科,周建召.双壁波纹塑料滤水管耐围压能力分析[J].西北农业大学学报,1996,24(6):69-73.
[8]陈松山,葛强,严登丰,等.泵站竖井进水流道数值模拟与装置特性试验[J].农业机械学报,2006,37(10):58-61.
[9]李宗利,王亚红,金学洋,等.恒定光滑裂缝宽度缝内水压发展过程试验与分析[J].水力发电学报,2011,(3):169-174.
[10]王纪科.薄壁低强度塑料滤水管适宜开孔率的研究[J].西北农业大学学报,1998,26(2):27-30.
[11]陈崇希,胡立堂.渗流-管流耦合模型及其应用综述[J].水文地质工程地质,2008,35(3):70-75.
[12]齐学斌.非稳定流抽水试验参数计算的迭代算法及计算机模拟[J].水利学报,1995,35(7):67-71.
[13]邹正盛,郑清洁.用抽水试验确定水跃值的计算机方法[J].勘察科学技术,2000,20(8):13-14.
[14]Dongmin Sun,Hongbin Zhan.Flow to a horizontal well in an aquitard-aquifer system[J].Journal of Hydrology,2006,321(4):364-376.
[15]Chang Y C,Yeh H D.New solutions to the constant-head test performed at a partially penetrating well[J].Journal of Hydrology,2009,369:90-97.
[16]Mohamed A,Rushton K.Horizontal wells in shallow aquifers:field experiment and numerical model[J].Journal of Hydrology,2006,329:98-109.
[17]郭雷,张宗孝,马斌,等.竖井溢洪道水力特性试验研究[J].人民长江,2007,38(6):110-112.
[18]徐亚,胡立堂,仪彪奇.井孔-含水层系统数值模拟方法研究进展[J].水文地质工程地质,2011,38(4):26-31.