张彬, 李玉涛, 石磊, 彭振华, 李俊彦. 2018: 海岛环境下地下水封油库海水入侵数值模拟研究. 工程地质学报, 26(5): 1366-1374. DOI: 10.13544/j.cnki.jeg.2018058
    引用本文: 张彬, 李玉涛, 石磊, 彭振华, 李俊彦. 2018: 海岛环境下地下水封油库海水入侵数值模拟研究. 工程地质学报, 26(5): 1366-1374. DOI: 10.13544/j.cnki.jeg.2018058
    ZHANG Bin, LI Yutao, SHI Lei, PENG Zhenhua, LI Junyan. 2018: NUMERICAL SIMULATION OF SEAWATER INTRUSION IN UNDERGROUND OIL STORAGE CAVERN IN ISLAND ENVIRONMENT. JOURNAL OF ENGINEERING GEOLOGY, 26(5): 1366-1374. DOI: 10.13544/j.cnki.jeg.2018058
    Citation: ZHANG Bin, LI Yutao, SHI Lei, PENG Zhenhua, LI Junyan. 2018: NUMERICAL SIMULATION OF SEAWATER INTRUSION IN UNDERGROUND OIL STORAGE CAVERN IN ISLAND ENVIRONMENT. JOURNAL OF ENGINEERING GEOLOGY, 26(5): 1366-1374. DOI: 10.13544/j.cnki.jeg.2018058

    海岛环境下地下水封油库海水入侵数值模拟研究

    NUMERICAL SIMULATION OF SEAWATER INTRUSION IN UNDERGROUND OIL STORAGE CAVERN IN ISLAND ENVIRONMENT

    • 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。

       

      Abstract: 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.

       

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