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反滤回灌井是山东胶东半岛地下水回灌中常用的回灌设施,它由普通回灌井和回灌池组成。在分析现有反滤回灌井存在问题的基础上,设计了一组回灌量大,又能防淤积、防低水位污水回灌、抗水流冲刷的多维反滤回灌井,给出了单井回灌量的理论计算公式和计算参数;同时,研制了室内稳定流回灌试验装置,进行了普通回灌井、现有反滤回灌井和多维反滤回灌井的室内稳定流试验研究,得出结论:1同现有反滤回灌井相比,多维反滤回灌井的单井回灌量增加了370%~420%;2多维回灌井口的形状影响单井回灌量,在过水断面面积相同的情况下,圆形多维回灌井口的单井回灌量最大;3初次回灌试验中,单井回灌量最大,随回灌试验次数增加,单井回灌量逐渐减小,并趋向于稳定;4单井回灌量与多维回灌井口过水断面开孔率是一个非线性的关系,20%的过水断面开孔率是适宜的。研究成果对于提高反滤回灌井的回灌能力和定量计算单井回灌量具有重要的现实意义。
Anti-filtration and recharge well is a commonly used recharge facility in Shandong Jiaodong Peninsula groundwater recharge, which is composed of ordinary recharge wells and recharge tanks. Based on the analysis of the existing problems in the filtration and recharge well, a set of multidimensional filtration and recharge wells with large volume of irrigation, anti-siltation, anti-low water level and water erosion resistance was designed. The theoretical calculation formula and the calculation parameters of the single-well recharging amount; at the same time, the indoor stable flow recharging test device has been developed, and the steady flow in the normal recharging well, the existing filter recharging well and the multi-dimensional filter recharging well The experimental results show that: 1 Compared with the existing filter-backfilling wells, the single-well injection volume of the multi-dimensional filter plugging wells increases by 370% ~ 420%; the shape of the 2-D recharge wellhead affects single well recharge In the case of the same cross-flow area, the single-well irrigation volume of the round multidimensional recharge wellhead is the largest. In the initial recharge experiment, the single-well irrigation volume is the largest, with the number of recharge trials increasing, The amount of recharge was gradually decreased and tended to be stable. 4 The ratio of single-well recharge to open-water ratio of wellhead cross-section in multi-dimensional recharge was a nonlinear relationship, and the porosity of 20% of the cross-flow section was suitable. The research results are of great practical significance for improving the recharge capability of the filter-backfilling wells and for calculating the single well recharge quantity.