| 地下咸水储能回灌含水层胶体释放动力学与渗透性变异 |
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| 引用本文： | 李海明,翟 菁,顾晓明,刘月辉,李 云.地下咸水储能回灌含水层胶体释放动力学与渗透性变异[J].岩土力学,2010,31(Z2):170-174. |
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| 作者姓名： | 李海明 翟 菁 顾晓明 刘月辉 李 云 |
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| 作者单位： | 1. 天津科技大学 滨海地下水利用与保护研究室，天津 300457；2.天津市勘察院，天津 300191 |
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| 基金项目： | 国家自然科学基金项目(No.40872156)；国家水体污染控制与治理科技重大专项(No.2009ZX07212-003)。 |
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| 摘 要： | 为了揭示天津滨海地区咸水储能回灌过程中含水层渗透性变化的机制,采用室内土柱试验的方法研究不同温度下咸水储能回灌过程中含水层胶体的释放量、释放速率以及胶体释放对含水层渗透性的影响,同时探讨了胶体释放过程中Ca2+的变化特征。研究结果表明,咸水储能回灌过程中含水层胶体释放是脉冲式的,表现为突然增加,然后缓慢降低,大约20个孔隙体积为一个周期;胶体累积释放量随着孔隙体积数的增加而增加;胶体释放量与孔隙体积数为分段函数,不同阶段胶体累积释放量增长幅度和释放速率发生变化。胶体释放过程中含水层的渗透系数随着孔隙体积数的增加呈"S"型曲线;0℃、10℃和20℃情况下咸水含水层渗透系数分别增加了4.02倍、12.21倍和6.63倍;不同温度下虽然含水层渗透系数开始有差异,但60个孔隙体积数后渗透系数均接近15cm/d左右。胶体释放过程中也存在着Ca2+-K+、Na+阳离子交换作用,不同的温度下这种交换作用动态特征不同。
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| 关 键 词： | 滨海地区 地下咸水 储能回灌 胶体释放 渗透性变异 |
| 收稿时间： | 2010-05-17 |
Dynamics of colloid release and variation of permeability of saline aquifer during aquifer thermal energy storage with recharging |
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| LI Hai-ming,ZHAI Jing,GU Xiao-ming,LIU Yue-hui,LI Yun.Dynamics of colloid release and variation of permeability of saline aquifer during aquifer thermal energy storage with recharging[J].Rock and Soil Mechanics,2010,31(Z2):170-174. |
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| Authors: | LI Hai-ming ZHAI Jing GU Xiao-ming LIU Yue-hui LI Yun |
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| Institution: | 1. Laboratory of Coastal Groundwater Utilization and Protection, Tianjin University of Science & Technology, Tianjin 300457, China; 2. Tianjin Investigation Institute, Tianjin 300191, China |
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| Abstract: | In order to reveal the mechanism of permeability variation of the aquifer in the process of the saline water energy storage with recharging in Tianjin coastal area, laboratory column experiments were conducted to investigate the capability and rate of colloid release at different temperatures, the effect of colloid release on the permeability of the aquifer, and the change characteristics of Ca2+ during colloid release. The research results show that the colloid release from saline aquifer water-bearing media is pulse type, and presents to increase suddenly and decrease slowly with the period of 20 pore volumes in the saline water energy storage recharging process. The cumulative release capacity of colloids from saline aquifer increases with increasing pore volumes; and the release dynamic curve of colloid is segmental straight-line, and release rate and growth range of colloid is decreased. The permeability of the aquifer varies in the process of colloid release. The permeability coefficient of the saline aquifer shows a curve of “S” type with increasing pore volumes. In the condition of 0℃,10℃ and 20℃, the permeability coefficient increass by 4.02, 12.21 and 6.63 times respectively. Although the initial permeability coefficients of the saline aquifer vary at different temperatures, and increases gradually to reach about 15 cm/d after 60 pore volumes. Ion exchange reactions of Ca2+ with K+, Na+ exist in the process of colloid release; but the dynamic features of the reactions change with temperatures. |
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| Keywords: | coastal area saline groundwater recharge of energy storage colloid release permeability variation |
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