海岛环境下地下水封油库海水入侵数值模拟研究
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摘要
海水入侵是影响海岛地下水封油库施工及运营安全的重要因素。海岛环境下建设地下水封油库,大规模的地下开挖将显著改变海岛天然地下水渗流场,海水入侵地下洞室一方面引发突水风险,另一方面海水中的氯离子将会对地下洞库结构设施造成侵蚀,影响地下油库的使用寿命。因此在海岛环境下建造地下水封油库,除了需要考虑水封可靠性与岩体稳定性外,还需要关注海水入侵等现象。科学设置水幕系统可以有效地减弱海水入侵风险,论文基于污染质运移相关理论,采用有限元数值模拟方法,以拟建浙江省舟山市某海岛大型地下水封油库为例,模拟了地下油库建造及运营期的海水入侵现象,研究表明:若不设置淡水水幕系统,开挖地下洞室会直接导致海水入侵;设置水平水幕后在确保水封可靠性的前提下,能在一定程度上减弱海水入侵;而设置垂直水幕系统则能较为明显地抑制海水入侵的发生。该成果为海岛环境下建造地下水封油库可能遇到的海水入侵问题研究提供了理论依据。
Seawater intrusion is an important factor affecting the safety of construction and operation of underground water-sealed oil caverns.In the island environment,massive excavation of underground caverns can significantly change the natural groundwater seepage field of the island,causing seawater intrusion.On the one hand,seawater intrusion can increase the risk of water inrush.On the other hand,the chloride ion in the seawater can cause erosion of the structure and facilities of underground caverns,which can affect the service life of the underground oil storage cavern.Therefore,consideration is necessary about the water-sealed reliability and the stability of rock masses in the construction of groundwater oil storage cavern in island environment.Attention must be paid on seawater intrusion.Scientifically deployed water curtain systems can effectively reduce the risk of seawater intrusion.The study is based on the related theory of pollution transport,and uses finite element numerical simulation method.A simulation of seawater intrusion is carried out about the proposed large scale underground oil storage cavern of an island in Zhejiang province.Research results show the follows.Without fresh water curtain system,excavation of underground caverns can cause seawater intrusion.Horizontal water curtain system can weaken seawater intrusion to a certain extent on the basis of satisfying the reliability of water-sealed.Vertical water curtain system can obviously inhibit the occurrence of seawater intrusion.The research results provide a theoretical basis for the study of seawater intrusion in underground oil storage cavern in island environment.
Seawater intrusion is an important factor affecting the safety of construction and operation of underground water-sealed oil caverns.In the island environment,massive excavation of underground caverns can significantly change the natural groundwater seepage field of the island,causing seawater intrusion.On the one hand,seawater intrusion can increase the risk of water inrush.On the other hand,the chloride ion in the seawater can cause erosion of the structure and facilities of underground caverns,which can affect the service life of the underground oil storage cavern.Therefore,consideration is necessary about the water-sealed reliability and the stability of rock masses in the construction of groundwater oil storage cavern in island environment.Attention must be paid on seawater intrusion.Scientifically deployed water curtain systems can effectively reduce the risk of seawater intrusion.The study is based on the related theory of pollution transport,and uses finite element numerical simulation method.A simulation of seawater intrusion is carried out about the proposed large scale underground oil storage cavern of an island in Zhejiang province.Research results show the follows.Without fresh water curtain system,excavation of underground caverns can cause seawater intrusion.Horizontal water curtain system can weaken seawater intrusion to a certain extent on the basis of satisfying the reliability of water-sealed.Vertical water curtain system can obviously inhibit the occurrence of seawater intrusion.The research results provide a theoretical basis for the study of seawater intrusion in underground oil storage cavern in island environment.
引文
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Cao Q,Yang A W,Li Q M,et al.2016.Statistic analysis of groundwater corrosion to subway tunnel structure under seawater intrusion[J].Journal of Engineering Geology,24(3):345-351.
Chen Q M.1991.Research on flowing character of phreatic water and the prevention of pollution after seawater intrusion into sea island[J]Journal of Fuzhou University(Natural Science),19(3):95-100.
Cheng J M,Chen C X,Ji M R,et al.2001.Three-dimensional numerica study for salt water intrusion in multi-layered coastal aquifers in the Jahe river basin,Shandong Province,China[J].Earth Science Frontiers,8(1):179-184.
Cheng X L,Cui C Y,Sun S J.2014.Application of COMSOLmultiphysicsin geotechnical engineering[M].Beijing:China Architecture and Building Press.
Gupta A D,Yapa P N D D.1982.Saltwater encroachment in an aquifer:A case study[J].Water Resources Research,18(3):546-556.
Huyakorn P S,Andersen P F,Mercer J W,et al.1987.Saltwater intrusion in aquifers:Development and testing of a three-dimensional finite element model[J].Water Resources Research,23(2):293-312.
Jo Y J,Lee J Y,Choi M J,et al.2010.Characteristics of seepage water and groundwater in Incheon Coastal LPG storage cavern[J].The Journal of Engineering Geology,20(1):1-12.
Kim J H,Kim R H,Lee J,et al.2003.Hydrogeochemical characterization of major factors affecting the quality of shallow groundwater in the coastal area at Kimje in South Korea[J].Environmental Geology,44(4):478-489.
Lee C,Cheng R T.1974.On seawater encroachment in coastal aquifers[J].Water Resources Research,10(5):1039-1043.
Lee E,Lim J W,Moon H S,et al.2015.Assessment of seawater intrusion into underground oil storage cavern and prediction of its sustainability[J].Environmental Earth Sciences,73(3):1179-1190.
Lee J Y,Cho B W.2008.Submarine groundwater discharge into the coast revealed by water chemistry of man-made undersea liquefied petroleum gas cavern[J].Journal of Hydrology,360(1):195-206.
Lee J,Kim J H,Kim H M,et al.2007.Statistical approach to determine the salinized ground water flow path and hydrogeochemical features around the underground LPG cavern,Korea[J].Hydrological Processes,21(26):3615-3626.
Li S C,Ping Y,Wang Z C,et al.2012.Assessments of containment and stability of underground crude oil storage caverns based on fluidsolid coupling theory for discrete medium[J].Chinese Journal of Rock Mechanics and Engineering,31(11):2161-2170.
Moor Y H,Stoessell R K,Easley D H.1992.Fresh-water/sea-water relationship within a ground-water flow system.Northeastern coast of the Yucatan Peninsula[J].Ground Water,30(3):343-350.
Park H Y,Jang K,Ju J W,et al.2012.Hydrogeological characterization of seawater intrusion in tidally-forced coastal fractured bedrock aquifer[J].Journal of Hydrology,446-447:77-89.
Pinder G F,Jr H H C.1970.A numerical technique for calculating the transient position of the saltwater front[J].Water Resources Research,6(3):875-882.
Shi L,Zhang B,Wang L,et al.2018.Functional efficiency assessment of the water curtain system in an underground water-sealed oil storage cavern based on time-series monitoring data[J].Engineering Geology,239:79-95.
The National Standards Compilation Group of the People's Republic of China.2009.Code for design of underground oil storage in rock caverns(GB 50455-2008)[S].Beijing:China Planning Press.
Voss C I,Souza W R.1987.Variable density flow and solute transport simulation of regional aquifers containing a narrow freshwatersaltwater transition zone[J].Water Resources Research,23(10):1851-1866.
Xue Y Q.1986.Theory of groundwater hydrodynamics[M].Beijing:Geology Press.
Yang R,Hu C,Chen G,et al.2018.Multi-joint water curtain borehole test method and application case[J].Journal of Engineering Geology,26(3):817-824.
Zhang B,Shi L,Yang S,et al.2016.Minimum separation distance between existing and newly constructing underground water-sealed oil storages[J].Journal of Engineering Geology,24(5):815-822.
Zhang B,Li W M,Feng F,et al.2012.Numerical ssimulation for fluidsolid coupling characteristics in surrounding rock of underground water-sealed oil storage based[J].Journal of Engineering Geology,20(5):789-795.
Zhao Z K,Jia Y G,Guo L,et al.2012.Experimental research on monitoring of seawater intrusion process using high-density resistivity probe[J].Journal of Engineering Geology,20(5):868-876.
曹权,杨爱武,李清明,等.2016.海水入侵对地铁地下结构侵蚀性的统计分析[J].工程地质学报,24(3):345-351.
陈祺模.1991.对海岛潜水流动特性和防止海水入侵污染问题的探讨[J].福州大学学报(自然科学版),19(3):95-100.
成建梅,陈崇希,吉孟瑞,等.2001.山东烟台夹河中、下游地区海水入侵三维水质数值模拟研究[J].地学前缘,8(1):179-184.
程学磊,崔春义,孙世娟.2014.COMSOL Multiphysics在岩土工程中的应用[M].北京:中国建筑工业出版社.
李术才,平洋,王者超,等.2012.基于离散介质流固耦合理论的地下石油洞库水封性和稳定性评价[J].岩石力学与工程学报,31(11):2161-2170.
薛禹群.1986.地下水动力学原理[M].北京:地质出版社.
杨荣,胡成,陈刚,等.2018.多孔联合水幕效率试验方法及应用实例[J].工程地质学报,26(3):817-824.
张彬,李卫明,封帆,等.2012.基于COMSOL的地下水封油库围岩流固耦合特征模拟研究[J].工程地质学报,20(5):789-795.
张彬,石磊,杨森,等.2016.新建地下水封油库对附近运行油库水封可靠性影响研究[J].工程地质学报,24(5):815-822.
赵战坤,贾永刚,郭磊,等.2012.高密度电阻率探针原位监测海水入侵过程试验研究[J].工程地质学报,20(5):868-876.
中华人民共和国国家标准编写组.2009.地下水封石洞油库设计规范(GB 50455-2008)[S].北京:中国计划出版社.
Cao Q,Yang A W,Li Q M,et al.2016.Statistic analysis of groundwater corrosion to subway tunnel structure under seawater intrusion[J].Journal of Engineering Geology,24(3):345-351.
Chen Q M.1991.Research on flowing character of phreatic water and the prevention of pollution after seawater intrusion into sea island[J]Journal of Fuzhou University(Natural Science),19(3):95-100.
Cheng J M,Chen C X,Ji M R,et al.2001.Three-dimensional numerica study for salt water intrusion in multi-layered coastal aquifers in the Jahe river basin,Shandong Province,China[J].Earth Science Frontiers,8(1):179-184.
Cheng X L,Cui C Y,Sun S J.2014.Application of COMSOLmultiphysicsin geotechnical engineering[M].Beijing:China Architecture and Building Press.
Gupta A D,Yapa P N D D.1982.Saltwater encroachment in an aquifer:A case study[J].Water Resources Research,18(3):546-556.
Huyakorn P S,Andersen P F,Mercer J W,et al.1987.Saltwater intrusion in aquifers:Development and testing of a three-dimensional finite element model[J].Water Resources Research,23(2):293-312.
Jo Y J,Lee J Y,Choi M J,et al.2010.Characteristics of seepage water and groundwater in Incheon Coastal LPG storage cavern[J].The Journal of Engineering Geology,20(1):1-12.
Kim J H,Kim R H,Lee J,et al.2003.Hydrogeochemical characterization of major factors affecting the quality of shallow groundwater in the coastal area at Kimje in South Korea[J].Environmental Geology,44(4):478-489.
Lee C,Cheng R T.1974.On seawater encroachment in coastal aquifers[J].Water Resources Research,10(5):1039-1043.
Lee E,Lim J W,Moon H S,et al.2015.Assessment of seawater intrusion into underground oil storage cavern and prediction of its sustainability[J].Environmental Earth Sciences,73(3):1179-1190.
Lee J Y,Cho B W.2008.Submarine groundwater discharge into the coast revealed by water chemistry of man-made undersea liquefied petroleum gas cavern[J].Journal of Hydrology,360(1):195-206.
Lee J,Kim J H,Kim H M,et al.2007.Statistical approach to determine the salinized ground water flow path and hydrogeochemical features around the underground LPG cavern,Korea[J].Hydrological Processes,21(26):3615-3626.
Li S C,Ping Y,Wang Z C,et al.2012.Assessments of containment and stability of underground crude oil storage caverns based on fluidsolid coupling theory for discrete medium[J].Chinese Journal of Rock Mechanics and Engineering,31(11):2161-2170.
Moor Y H,Stoessell R K,Easley D H.1992.Fresh-water/sea-water relationship within a ground-water flow system.Northeastern coast of the Yucatan Peninsula[J].Ground Water,30(3):343-350.
Park H Y,Jang K,Ju J W,et al.2012.Hydrogeological characterization of seawater intrusion in tidally-forced coastal fractured bedrock aquifer[J].Journal of Hydrology,446-447:77-89.
Pinder G F,Jr H H C.1970.A numerical technique for calculating the transient position of the saltwater front[J].Water Resources Research,6(3):875-882.
Shi L,Zhang B,Wang L,et al.2018.Functional efficiency assessment of the water curtain system in an underground water-sealed oil storage cavern based on time-series monitoring data[J].Engineering Geology,239:79-95.
The National Standards Compilation Group of the People's Republic of China.2009.Code for design of underground oil storage in rock caverns(GB 50455-2008)[S].Beijing:China Planning Press.
Voss C I,Souza W R.1987.Variable density flow and solute transport simulation of regional aquifers containing a narrow freshwatersaltwater transition zone[J].Water Resources Research,23(10):1851-1866.
Xue Y Q.1986.Theory of groundwater hydrodynamics[M].Beijing:Geology Press.
Yang R,Hu C,Chen G,et al.2018.Multi-joint water curtain borehole test method and application case[J].Journal of Engineering Geology,26(3):817-824.
Zhang B,Shi L,Yang S,et al.2016.Minimum separation distance between existing and newly constructing underground water-sealed oil storages[J].Journal of Engineering Geology,24(5):815-822.
Zhang B,Li W M,Feng F,et al.2012.Numerical ssimulation for fluidsolid coupling characteristics in surrounding rock of underground water-sealed oil storage based[J].Journal of Engineering Geology,20(5):789-795.
Zhao Z K,Jia Y G,Guo L,et al.2012.Experimental research on monitoring of seawater intrusion process using high-density resistivity probe[J].Journal of Engineering Geology,20(5):868-876.
曹权,杨爱武,李清明,等.2016.海水入侵对地铁地下结构侵蚀性的统计分析[J].工程地质学报,24(3):345-351.
陈祺模.1991.对海岛潜水流动特性和防止海水入侵污染问题的探讨[J].福州大学学报(自然科学版),19(3):95-100.
成建梅,陈崇希,吉孟瑞,等.2001.山东烟台夹河中、下游地区海水入侵三维水质数值模拟研究[J].地学前缘,8(1):179-184.
程学磊,崔春义,孙世娟.2014.COMSOL Multiphysics在岩土工程中的应用[M].北京:中国建筑工业出版社.
李术才,平洋,王者超,等.2012.基于离散介质流固耦合理论的地下石油洞库水封性和稳定性评价[J].岩石力学与工程学报,31(11):2161-2170.
薛禹群.1986.地下水动力学原理[M].北京:地质出版社.
杨荣,胡成,陈刚,等.2018.多孔联合水幕效率试验方法及应用实例[J].工程地质学报,26(3):817-824.
张彬,李卫明,封帆,等.2012.基于COMSOL的地下水封油库围岩流固耦合特征模拟研究[J].工程地质学报,20(5):789-795.
张彬,石磊,杨森,等.2016.新建地下水封油库对附近运行油库水封可靠性影响研究[J].工程地质学报,24(5):815-822.
赵战坤,贾永刚,郭磊,等.2012.高密度电阻率探针原位监测海水入侵过程试验研究[J].工程地质学报,20(5):868-876.
中华人民共和国国家标准编写组.2009.地下水封石洞油库设计规范(GB 50455-2008)[S].北京:中国计划出版社.