地铁长大过海区间隧道通风排烟方案

发布时间：2019-03-14 20:58

【摘要】：针对地铁长大过海区间隧道通风排烟问题,结合青岛地铁1号线瓦贵区间工程,采用理论及对比分析、数值解算等方法,分析过海区间隧道区间风井设置、火灾工况气流组织等问题。介绍青岛地铁1号线瓦贵区间概况,然后提出区间风井设置的要点,参考国内相关城市过江工程实例,采用土建排烟风道,以保证灾害工况下两车追踪人员的疏散安全。阐述陆域段防排烟和海域段防排烟方案,对于陆域段,排烟方案可以按照常规地铁区间进行设置;对于海域段,需根据区间长度,采用全吊顶或者局部吊顶排烟方案。通过研究区间火灾安全目标,设定热释放功率为10 MW,隧道临界风速为2.1 m/s,重点排烟量为80 m3/s,并绘制通风网络解算结果图,解算结果表明各区间风井的防排烟系统均满足规范要求。
[Abstract]:In view of the problem of ventilation and exhaust smoke in the inter-sea tunnel of the large-scale subway, combined with the tile-Gui interval project of Qingdao Metro Line 1, the installation of wind shafts in the cross-sea tunnel is analyzed by using the methods of theoretical and comparative analysis, numerical calculation, and so on. Problems such as air flow distribution in fire conditions. This paper introduces the general situation of tile-Gui interval of Qingdao Metro Line 1, and then puts forward the key points of setting up interval wind shafts. Referring to the example of cross-river project in relevant cities in China, the civil construction smoke exhaust duct is adopted to ensure the evacuation safety of the two-car tracker under the condition of disaster. This paper expounds the smoke control scheme for the land and sea areas, for the land area, the smoke exhaust scheme can be set in accordance with the conventional subway interval, and for the sea area, the smoke exhaust scheme with full or local ceiling should be adopted according to the length of the sea area. By studying the fire safety target in the interval, the critical wind speed of 10 MW, tunnel is set to be 2.1 mm2, the key exhaust smoke is 80 m3, and the result diagram of ventilation network calculation is drawn. The calculation results show that the smoke control system of each interval air shaft meets the requirements of the code.
【作者单位】：中铁隧道勘测设计院有限公司第五设计分院;
【分类号】：U231.5;U453.5

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