| 渗流井合理竖井降深确定 |
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| 引用本文： | 王玮,刘基,陈立,宁丽娜,薛璐.渗流井合理竖井降深确定[J].西安地质学院学报,2009(3):281-284. |
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| 作者姓名： | 王玮 刘基 陈立 宁丽娜 薛璐 |
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| 作者单位： | 长安大学环境科学与工程学院,陕西西安710054 |
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| 基金项目： | 国家自然科学基金项目（40502025）;长安大学科学基金项目（05Q12） |
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| 摘 要： | 通过采用单位面积河流在单位水头差作用下的渗漏量来表征河流渗漏能力,建立渗流井取水理想模型,分别计算了在不同河流渗漏能力和含水层渗透性能条件下,竖井降深对渗流井出水量的影响。建立渗流井取水非稳定流模型,计算了在前期稳定竖井降深不同条件下,河流断流后渗流井出水量衰减过程及竖井降深发展过程。提出渗流井合理竖井降深应根据河流与地下水是否脱节以及含水层渗透性能,在岸边渗流井中部及一侧各布设一个观测孔,根据观测孔水位进行确定。对于含水层渗透性能较强地区,渗流井竖井降深应使得渗流井范围内地下水位与河流脱节,但高于辐射孔顶面;对于含水层渗透性能较差地区,渗流井竖井降深应使得侧部观测孔水位接近河床底面或刚出现脱节。
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| 关 键 词： | 渗流井 合理降深 渗漏能力 脱节 数值模拟 |
Determination on the Reasonable Drawdown of Vertical Well of a Seepage Well |
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| Authors: | WANG Wei LIU Ji CHEN Li NING Li-na XUE Lu |
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| Institution: | (School of Environmental Sciences and Engineering, Chang＇an University, Xi＇an 710054, Shaanxi, China) |
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| Abstract: | By using an ideal model for seepage well and the leakage with specific head difference in specific area to represent the leakage capability of the river,the effects of different drawdown on the yield of seepage well are calculated under different leakage capability of river and different permeability of aquifer.The process of the flow rate reduction of the seepage well and the process of the drawdown development of vertical well while the river dried up are illustrated by the transient model of seepage well under different previous steady drawdown ofvertical well. The results show that the reasonable drawdown of vertical well of seepage well should be determined by the water level of observation wells located in both central part and side part of the seepage well based on whether the river disconnects groundwater, and the permeability of aquifer. As for the high permeability aquifer, drawdown of vertical well should make the groundwater level disconnect the river, but higher than the top of the radiate bores as for the poor permeability aquifer, the drawdown should make the water level of the side observation well close to the bottom of riverbed or just disconnect with river. |
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| Keywords: | seepage well reasonable drawdown leakage ability disconnection numerical modeling |
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