地下水源热泵运行期地质环境监测与响应特征
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摘要
以上海某地下水源热泵实际工程为例,通过设置监测设施对换热区地温、水位、沉降及水质等地质环境要素进行了监测,根据地下水源热泵系统稳定运行3a的监测数据,分析评价了地质环境要素变化特征及与工程运行的关系。研究结果表明:受地下水抽/灌的影响,监测井处含水层地温随季节呈波状起伏变化,制冷季末不同深度地温均呈逐年降低趋势且含水层上部地温高于下部;监测孔中地下水位呈季节性上升下降,最大变幅约1. 1m;各分层沉降标均呈下沉趋势且不同深度的分层标变形量存在差异;含水层发生季节性的压密和回弹,上覆隔水层与含水层的变形特征相反,最大累计变形量达1. 2mm;监测期内地下水水质未产生明显变化。
Taking the groundwater source heat pump( GWHP) project in Shanghai as an example,the ground temperature,water level,settlement and water quality are collected for three years from the monitoring facilities. The relationship between the characteristics of geological environment changes and the project operation are analyzed according to the monitoring results. The study results show that the aquifer's temperature in the monitoring well fluctuates with the seasons from the influences of pumping and pouring groundwater. At the end of the refrigeration season,the ground temperature at different depths decreases year by year,and the aquifer temperature at the upper part is higher than the lower part. The water level is rising and falling seasonally in the monitoring well with the maximum change range about 1. 1 m. The subsidence marks of different depths are sinking down,but the deformation is different with the depth. The seasonal compaction and rebound deformation occur in the aquifer. The deformation characteristics of the upper aquifuge are contrary to the aquifer. The maximum cumulative deformation is about 1. 2 mm. The groundwater quality has not changed obviously during the monitoring period.
Taking the groundwater source heat pump( GWHP) project in Shanghai as an example,the ground temperature,water level,settlement and water quality are collected for three years from the monitoring facilities. The relationship between the characteristics of geological environment changes and the project operation are analyzed according to the monitoring results. The study results show that the aquifer's temperature in the monitoring well fluctuates with the seasons from the influences of pumping and pouring groundwater. At the end of the refrigeration season,the ground temperature at different depths decreases year by year,and the aquifer temperature at the upper part is higher than the lower part. The water level is rising and falling seasonally in the monitoring well with the maximum change range about 1. 1 m. The subsidence marks of different depths are sinking down,but the deformation is different with the depth. The seasonal compaction and rebound deformation occur in the aquifer. The deformation characteristics of the upper aquifuge are contrary to the aquifer. The maximum cumulative deformation is about 1. 2 mm. The groundwater quality has not changed obviously during the monitoring period.
引文
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[2]骆祖江,周世玲,张德忠等.浅层地温能开发地下水源热泵系统热平衡分析三维数值模型[J].工程勘察,2013,41(10):33~37.Luo Zujiang, Zhou Shiling, Zhang Dezhong et al. Threedimensional numerical model for evaluation on development and utilization of shallow geothermal energy[J]. Geotechnical Investigation&Surveying, 2013, 41(10):33~37.(in Chinese)
[3] Russo S L, Civita M V. Hydrogeological and thermal characterization of shallow aquifers in the plain sector of Piemonte region(NW Italy):Implications for groundwater heat pumps diffusion[J]. Environmental Earth Sciences,2010,60(4):703~713.
[4] Yu Z,Zhang Y,Hao S et al. Numerical study based on one-year monitoring data of groundwater-source heat pumps primarily for heating:A case in Tangshan,China[J]. Environmental Earth Sciences,2016,75(14):1070.
[5] Masciale R, Carlo L D, Caputo M C et al. Groundwater exploitation as thermal fluid in very-low enthalpy geothermal plants in coastal aquifers[M]. Emerging Issues in Groundwater Resources. Springer International Publishing,2016.
[6]王琰,骆祖江,李伟等.浅层地温能开发与地下水环境影响模拟预测[J].太阳能学报,2015,36(5):1231~1238.Wang Yan,Luo Zujiang,Li Wei et al. Simulation of shallow geothermal energy development and groundwater environmental influence[J]. Acta Energiae Solaris Sinica. 2015,36(5):1231~1238.(in Chinese)
[7]杨勇,郑凡东,刘立才等.北京平原区地下水水位与地面沉降关系研究[J].工程勘察,2013,41(8):44~48.Yang Yong,Zheng Fandong, Liu Licai et al. Study on the correlation between groundwater level and ground subsidence in Beijing plain areas[J]. Geotechnical Investigation&Surveying,2013,41(8):44~48.(in Chinese)
[8]主灿,张云,何国峰等.天津滨海新区抽水引起地面沉降现场试验研究[J].水文地质工程地质,2018,45(2):159~164.Zhu Can,Zhang Yun,He Guofeng et al. In-situ tests of land subsidence caused by pumping in the Tianjin Binhai New Area[J]. Hydrogeology and Engineering Geology,2018,45(2):159~164.(in Chinese)
[9]陈文芳,杜尚海,张一博等.水源热泵运行中多组份溶质的反应迁移模拟[J].工程勘察,2017,45(7):32~38.Chen Wenfang, Du Shanghai, Zhang Yibo et al. Reactive transport simulation of multi-component solute in the operation of water source heat pump system[J]. Geotechnical Investigation&Surveying,2017,45(7):32~38.(in Chinese)
[10]陆海田,陶月赞,韩进军等.某地下水源热泵运行对水质因子影响研究[J].人民长江,2016,(S1):16~18.Lu Haitian,Tao Yuezan,Han Jinjun et al. Analysis on influence of groundwater heat pump system running on water quality factors[J]. Yangtze River,2016,(S1):16~18.(in Chinese)
[11]何国峰,张云,孙铁等.周期性开采和回灌条件下浅层地下水位变化特征研究——以天津滨海新区为例[J].水文地质工程地质,2016,43(6):27~34.He Guofeng,Zhang Yun,Sun Tie et al. Variation characteristics of shallow groundwater levels under periodic pumping and recharge test:Examplified by Tianjin Binhai New Area[J].Hydrogeology and Engineering Geology,2016,43(6):27~34.(in Chinese)
[12]栾长青.上海轨道交通9号线宜山路站基坑降水开挖工程性状及室内模型试验研究[D].上海:同济大学,2009.Luan Changqing. The research about influence on land subsidence due to pit drainage at the Yi Shan road station of Shanghai rail transit line 9 and indoor model test[D].Shanghai:Tongji University,2009.(in Chinese)
[13]徐红霞,黄驰.某地下水源热泵诱发地下水水质变异成因分析[J].水利与建筑工程学报,2016,14(6):157~161.Xu Hongxia,Huang Chi. Groundwater quality variation reasons induced by groundwater heat pumps[J]. Journal of Water Resources and Architectural Engineering,2016,14(6):157~161.(in Chinese)