| 黄修东,束龙仓,刘佩贵,王恩.注水井回灌过程中堵塞问题的试验研究[J].水利学报,2009,40(4): |
| 注水井回灌过程中堵塞问题的试验研究 |
| Experimental study on clogging of recharge well |
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| DOI： |
| 中文关键词: 人工回灌 机械堵塞 生物堵塞 粒径特征 |
| 英文关键词: artificial recharge well sand column physical clogging biological clogging sand size experimental study |
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| 中文摘要: |
| 采用砂柱在试验室内模拟井灌过程中注水井周围砂层的堵塞过程。通过测定渗透系数的变化来分析堵塞的程度，同时，通过测定水样悬浮物浓度(SS)、细菌数目、溶解氧(DO)、TOC等水质参数的变化来分析井灌过程中可能发生的物理、生物堵塞。试验分别采用平均粒径为0.59mm和0.34mm的两种砂样。试验结果分析表明：悬浮物颗粒填充砂粒介质空隙引起的机械堵塞和微生物积聚、繁殖堵塞介质空隙引起的生物堵塞是砂柱堵塞的主要原因；砂柱上部对悬浮物和微生物的过滤、吸附作用强，堵塞也更严重；介质粒径差异对堵塞过程和堵塞程度的影响明显，平均粒径较小的砂柱更容易发生堵塞，而平均粒径为059mm的砂柱渗透系数减小的持续时间长，渗透系数减小的幅度大。 |
| 英文摘要: |
| The clogging process of recharge well surrounded with sand was experimentally studied in laboratory using a sand column. The clogging degree was determined according to the changes of hydraulic conductivity and flow rate. At the same time the possible physical clogging and biological clogging were analyzed according to the measured suspended substance (SS), dissolved oxygen (DO), total organic carbon (TOC) and amount of bacteria in water. The experiments for two kinds of sand with averaged diameter 059mm and 034mm were carried out. The experimental result shows that the clogging due to suspended substance and accumulation of bacteria as well as the consequent reproduction of bacteria are the main causes giving rise to clogging. The upper part of the sand column plays the major role in filtration and adsorption so that the clogging is more severe. The sand particle size has apparent influence on the clogging process and clogging degree, the smaller size corresponding to higher possibility of clogging. |
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