|
|
|
| Analysis of unsaturated seepage siltation of groundwater source heat pump recharge |
| PAN Ding1,TANG Hong1,LIU Jun2 |
| (1. Urban Construction Institute,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;2. China Metallurgical Group Wuhan Survey Research Institute Co.,Ltd.,Wuhan,Hubei 430080,China) |
|
|
|
|
Abstract At present,analysis of recharge clogging focuses on saturated seepage,rather than unsaturated seepage which is discussed in this paper. In view of the difficult problem of water source heat pump pressure recharge in Wuhan area,using the unsaturated soil VG model and combined with relevant pumping recharge examples,the saturation of soils under different pressures is evaluated,and the change of the amount of pumped r is analyzed. It is pointed out that the pressure recharge will increase the involvement of gas phase factors and,to a certain extent,results in unsaturated seepage. Gas phase blockage maybe further causes unsaturated blockage. In addition,numerical simulation using FLAC3D is carried out,the pore pressure fields of pressure recharge and unsaturated seepage are compared. The change of the pore pressure field during the formation of unsaturated blockage is analyzed,and the area of unsaturated seepage around the back irrigation well is derived. Finally,different measures for the removal of siltation are proposed in the front and later stages,and new ideas are put forward for the study of segment blockage.
|
|
|
|
|
|
| 1] 杜新强,冶雪艳,路 莹,等. 地下水人工回灌堵塞问题研究进展[J]. 地球科学进展,2009,24(9):973–980.(DU Xinqiang,YE Xueyan,LU Ying,et al. Advances in research onblockage of artificial recharge of groundwater[J]. Progress in Earth Sciences,2009,24(9):973–980.(in Chinese))
[2] 亢 涵,王谋薇,藏春月,等. 地下水源热泵回灌堵塞的研究现状与展望[J]. 地球环境学报,2017,8(4):320–326.(YAN Han,WANG Muwei,TIBETAN Spring Moon,et al. Current situation and prospect of recharge blockage of underground water source heat pump[J]. Journal of the Earth Environment,2017,8(4):320–326.(in Chinese))
[3] 赵建康,张 勇,崔 进. 压力回灌技术在水源热泵系统中的应用研究[J]. 探矿工程(岩土钻掘工程),2010,37(3):55–58.(ZHAO Jiankang,ZHANG Yong,CUI Jin. Application of pressure recharge technology in water source heat pump system[J]. Prospecting Engineering(Geotechnical Drilling Engineering),2010,37(3):55–58.(in Chinese))
[4] 刘记来,代 维. 压力回灌中回灌量衰减因素探讨[J]. 节水灌溉,2013,(8):52–53.(LIU Jilai,DAI Wei. Discussion on attenuation factors of recharge in pressure recharge[J]. Water-saving Irrigation,2013,(8):52–53.(in Chinese))
[5] CAO G L,SCANLON B R,HAN D M,et al. Impacts of thickening unsaturated zone on groundwater recharge in the North China Plain[J]. Journal of Hydrology,2016,537:260–270.
[6] 赵成刚,李 舰,刘 艳,等. 非饱和土力学中几个基本问题的探讨[J]. 岩土力学,2013,34(7):1 825–1 831.(ZHAO Chenggang,LI Jian,LIU Yan,et al. Discussion on several basic problems in mechanics of unsaturated soil[J]. Rock and Soil Mechanics,2013,34(7):1 825–1 831.(in Chinese))
[7] 束龙仓,张永杰,许 杨,等. 地下水人工回灌气相堵塞特征的试验研究[J]. 水科学进展,2017,28(5):756–762.(SHU Longcang,ZHANG Yongjie,XU Yang,et al. Experimental study on gas phase blocking characteristics of artificial irrigation of groundwater[J]. Progress in Water Science,2017,28(5):756–762.(in Chinese))
[8] 吴继强,张纪哲,李晓辉,等. 西安市城区地热水人工加压回灌试验研究[J]. 水资源与水工程学报,2014,25(5):215–218.(WU Jiqiang,ZHANG Jizhe,LI Xiaohui,et al. Experimental study on artificial pressurized recharge of geothermal water in Xi'an city[J]. Journal of Water Resources and Water Engineering,2014,25(5):215–218.(in Chinese))
[9] 刘乐军,刘记来,代 维. 关于水源热泵压力回灌中气相堵塞作用的研究[J]. 节水灌溉,2013,(12):46–47.(LIU Lejun,LIU Jilai,DAI Wei. A study on gas phase blocking in water source heat pump pressure recharging[J]. Water-saving Irrigation,2013,(12):46–47.(in Chinese))
[10] 汤连生,张鹏程,刘增贤,等. 土体饱和度确定的两个问题[J]. 水文地质工程地质,2002,(5):1–3.(TANG Liansheng,ZHANG Pengcheng,LIU Zengxian,et al. Determination of soil saturation[J]. Hydrogeological Engineering Geology,2002,(5):1–3.(in Chinese))
[11] HE J,CHU J. Undrained responses of microbially desaturated sand under monotonic loading[J]. Journal of Geotechnical and Geoenvironmental Engineering,2014,140(5):04014003.
[12] HE J,CHU J,IVANOV V. Mitigation of liquefaction of saturated sand using biogas[J]. Géotechnique,2013,63(4):267–275.
[13] 方 志,陈育民,何森凯,等. 减饱和松砂静态液化的水–气两相流耦合分析[J]. 岩土力学,2017,38(11):3 378–3 384.(FANG Zhi,CHEN Yumin,HE Senkai,et al. Analysis of water-gas two-phase flow coupling for static liquefaction of unsaturated loose sand[J]. Rock and Soil Mechanics,2017,38(11):3 378–3 384.(in Chinese))
[14] SILLS G C,WHEELER S J,THOMAS S D,et al. Behaviour of offshore soils containing gas bubbles[J]. Geotechnique,1991,41(2):227–241.
[15] 蒋彭年. 非饱和土工程性质简论[J]. 岩土工程学报,1989,11(6):39–59.(JIANG Pengying. A brief brief history of the nature of unsaturated earth engineering. Chinese Journal of Geotechnical Engineering,1989,11(6):39–59.(in Chinese))
[16] 杨佃俊. 对地下水回灌中气相堵塞的研究[C]// 地温资源与地源热泵技术应用论文集(第四集).济南:[s. n.],2011:113–116.(YANG Tianjun. A study on gas phase blockage in groundwater recharge[C]// Ground Temperature Resources and Ground Source Heat Pump Technology Application(episode 4). Jinan:[s. n.],2011:113–116.(in Chinese))
[17] 马 聪,周维博,云 涛,等. 地下水源热泵对井抽灌系统回灌能力研究[J]. 太阳能学报,2015,36(3):593–598.(MA Cong,ZHOU Weibo,YUN Tao,et al. A study on recharge capacity of well pumping system by underground water source heat pump[J]. Journal of Solar Energy,2015,36(3):593–598.(in Chinese))
[18] LU N,LIKOS W J. 非饱和土力学[M]. 北京:高等教育出版社,2012:147–175.(LU N,LIKOS W J. Unsaturated soil mechanics[M]. Beijing:Higher Education Press,2012:147–175.(in Chinese))
[19] 马洪波,师占宾,孙 文. 由土–水特征曲线预测非饱和混合填料渗透系数[J]. 中国建材科技,2018,27(1):74–77.(MA Hongbo,SHI Zhanbin,SUN Wen. Prediction of permeability coefficient of unsaturated mixed packing by soil-water characteristic curve[J]. China Building Materials Technology,2018,27(1):74–77.(in Chinese))
[20] 卢俊义,王成军,董光辉. 深基坑工程引起的地面沉降研究[J]. 低温建筑技术,2009,31(5):84–86.(LU Junyi,WANG Chengjun,DONG Guanghui. A study on ground settlement caused by deep foundation pit engineering[J]. Low Temperature Construction Technology,2009,31(5):84–86.(in Chinese))
[21] VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal,1980,44(5):892–898.
[22] 冯 君,巫锡勇,孟少伟. 非饱和黏性土土水特征曲线的分形特性研究[J]. 铁道科学与工程学报,2017,14(7):1 435–1 441.(FENG Jun,WU Xiyong,MENG Shaowei. Fractal characteristics of water characteristic curves of unsaturated clay soils[J]. Journal of Railway Science and Engineering,2017,14(7):1 435–1 441.(in Chinese))
[23] 任 佳,简文星,陈小龙,等. 树坪滑坡非饱和土的土–水特征曲线试验研究[J]. 安全与环境工程,2016,23(4):14–19.(REN Jia,JANE Wenxing,CHEN Xiaolong,et al. Experimental study of unsaturated hydraulic characteristics of Shuping Landslide[J]. Safety and Environmental Engineering,2016,23(4):14–19.(in Chinese))
[24] 夏 雄,董亮亮,张爱琴,等. 考虑气相堵塞的土样渗透试验分析[J]. 常州大学学报:自然科学版,2012,24(1):55–58.(XIA Xiong,DONG Liangliang,ZHANG Aiqin,et al. Analysis of soil sample penetration test considering gas phase blockage[J]. Journal of Changzhou University:Natural Science,2012,24(1):55–58.(in Chinese))
[25] 田湖南,孔令伟. 细粒对砂土持水能力影响的试验研究[J]. 岩土力学,2010,31(1):56–60.(TIAN Hunan,KONG Lingwei. Experimental study on effect of fine grain on water holding capacity of sand[J]. Rock and Soil Mechanics,2010,31(1):56–60.(in Chinese))
[26] 陈卫金,程东会,陶 伟. Van Genuchten模型参数的物理意义[J].水文地质工程地质,2017,44(6):147–153.(CHEN Weijin,CHENG Donghui,TAO Wei. Physical meaning of Van Genuchten model parameters[J]. Hydrogeological Engineering Geology,2017,44(6):147–153.(in Chinese))
[27] 周跃峰,谭国焕,甄伟文,等. 非饱和渗流分析在FLAC3D中的实现和应用[J]. 长江科学院院报,2013,30(2):57–61.(ZHOU Yuefeng,TAN Guohuan,ZHEN Weiwen,et al. Realization and application of unsaturated seepage analysis in FLAC3D[J]. Journal of Changjiang Academy of Sciences,2013,30(2):57–61.(in Chinese))
[28] 李 毅,伍 嘉,李 坤. 基于FLAC~(3D)的饱和–非饱和渗流分析[J]. 岩土力学,2012,33(2):617–622.(LI Yi,WU Jia,LI Kun. Saturated-unsaturated seepage analysis based on FLAC~(3D)[J]. Rock and Soil Mechanics,2012,33(2):617–622.(in Chinese))
[29] 陈育民,徐鼎平. FLAC/FLAC3D 基础与工程实例[M]. 北京:中国水利水电出版社,2013:408–424.(CHEN Yumin,XU Dingping. FLAC/FLAC3D basis and engineering instance[M]. Beijing:China Water Power Press,2013:408–424.( in Chinese))
[30] 赵成刚,李 舰,宋朝阳,等. 土力学理论需要发展与变革[J]. 岩土工程学报,2018,40(8):1 383–1 394.(ZHAO Chenggang,LI Jian,SONG Chaoyang,et al. The theory of geomechanics needs development and change[J]. Chinese Journal of Geotechnical Engineering,2018,40(8):1 383–1 394.(in Chinese))
[31] 赵 军,张程远,刘泉声. 地下水源热泵砂层阻塞试验研究(II)[J].岩石力学与工程学报,2013,32(增2:3 363–3 369.(ZHAO Jun,ZHANG Chengyuan,LIU Quansheng. Experimental study on blocking of sand layer of groundwater heat pump (II)[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(Supp.2):3 363–3 369.(in Chinese)) |
|
|
|