水利水电技术（中英文）

【目的】在城市地下空间综合化高速开发的同时，极端降雨所引发的城市内涝灾害频繁发生，洪水倒灌入侵地铁车站事故导致了严重的人员伤亡和财产损失。洪水经由车站流入隧道对运营中的车辆设备及乘客人员造成重大威胁，为预防和应对多种工况下洪水侵入地铁系统灾害，通过数值分析方法，模拟不同工况洪水入侵和淹没复杂地铁车站的全过程，并预测计算流入隧道的洪水量。【方法】以南宁市地铁换乘车站明秀路站为原型，构建三维数值仿真模型。研究防淹门不同启闭条件下，百年一遇入侵洪水高度、50 cm和30 cm入侵洪水高度水位洪水入侵复杂地铁车站的全过程。基于Volume of Fluid (VOF)模型方法，模拟分析了不同工况下洪水在地铁车站内的淹没区域范围与积聚深度，探讨洪水激增规律以及危险区域分布情况。针对百年一遇洪水入侵工况，分析了物业开发层的水深分布规律，并通过计算得到该区域的人员疏散路径。【结果】结果显示：在洪水入侵灾害中，明秀路站被淹没速度和淹没高度随入侵洪水高度的提升而加快和增加；关闭防淹门可以防止大量洪水流入隧道，但是将会严重加剧站内积水；与地铁车站相连的物业开发层可能导致洪水更快更多地入侵淹没明秀路站，分布密集且狭小的通道口处积水较深。【结论】结果表明：数值模拟的方法可以较为容易地计算得到洪水入侵灾害中地铁车站的淹没过程和范围，通过改变出入口条件可以得到例如防淹门启闭措施对不同入侵洪水高度洪水入侵的影响，可为灾前预防隐患和灾时应急措施提供参考。

[Objective] Along with the rapid development of integrated urban underground space, urban flooding disasters caused by extreme rainfall have occurred frequently, and the intrusion of flood water into metro stations has led to serious casualties and property damage. Flood flows through the station into the tunnel pose a major threat to the operating vehicle equipment and passengers. Therefore, in order to prevent and cope with the disaster of flooding into the metro system under various working conditions, the whole process of flooding into and inundating the complex metro stations under different working conditions was simulated by numerical analysis method, and the amount of flooding into the tunnel was predicted and calculated. [Methods]A three-dimensional numerical simulation model was constructed based on a prototype of Nanning Metro Transfer Station: Mingxiu Road Station. The whole process of floodwater intrusion into a complex metro station under different opening and closing conditions of floodgates at high ground water levels, including 100-year flood height, 50 cm flood height and 30 cm flood height was studied. Based on the Volume of Fluid(VOF) modeling method, the flood area and accumulation depth in the metro station were simulated and analyzed under various working conditions, and the surge laws of flooding and the distribution of hazard areas were discussed. For the 100-year flood intrusion working condition the flood depth distribution law of the property development floor was analyzed and the evacuation route of the people in the area was proposed by the calculated. [Results] The results show that in the flood intrusion disaster, the submersion speed and submerged height of Mingxiu Road Station accelerate and increase with the increase of ground water levels. Closing flood gates can prevent large amounts of floodwater from flowing into the tunnel, but it will seriously exacerbate floodwater accumulation in the station. The property development floor connected to the metro station may cause flooding to intrude Mingxiu Road Station more quickly, and there is deep water accumulation at the entrance of the densely distributed and narrow passages. [Conclusion] The numerical simulation method can easily calculate the inundation process and scope of metro stations in flood intrusion disasters, and the impact of flood gates opening and closing measures on flood intrusion in different areas of water can be obtained by changing the boundary conditions, which can provide reference for prevention hidden dangers and emergency measures during disasters.