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应力场与渗流场耦合是影响水封式地下储油洞库群稳定性的重要因素之一。洞库群的开挖导致形成区域地下水降落漏斗,因此储库水封系统必须保证稳定的地下水位。以“黄岛地下水封洞库工程”的设计方案为模型,基于流固耦合分析理论,采用有限差分软件Flac3D进行数值模拟,主要分析了饱和水状态下,渗流场对洞库周围围岩应力、位移变形和孔隙水压力的影响,并确定合理的水封方案和最优的水封巷道高度。文中所得结论对实际地下洞库群的设计施工具有一定的参考价值。
The coupling of stress field and seepage field is one of the important factors that affect the stability of the water sealed underground reservoir group. The excavation of the caverns led to the formation of regional groundwater descent funnel, so the reservoir water seal system must ensure a stable groundwater table. Based on the design scheme of “Huangdao Groundwater Sealing and Cavern Engineering”, based on the fluid-solid coupling analysis theory, finite difference software Flac3D was used to carry out numerical simulation. It mainly analyzed the influence of seepage field on the surrounding rock Stress, displacement deformation and pore water pressure, and determine the reasonable water seal scheme and the optimal water seal tunnel height. The conclusions obtained in this paper have certain reference value for the design and construction of the actual underground caverns.