铁路盾构隧道火灾烟气控制数值模拟研究  

Numerical Simulation Study on Fire Smoke Controlling in Railway Shield Tunnel

作　　者：资谊[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道标准设计》2013年第9期82-86,共5页Railway Standard Design

基　　金：铁道部科技研究开发计划项目(2006G007-C)

摘　　要：提出人员危害耐受度、衬砌结构的危害温度、车窗玻璃破碎温度3个烟气流动控制有效性的判据。以狮子洋水下盾构铁路隧道为研究对象,采用FDS4.0对-3%坡度隧道列车头部15 MW火灾时,烟气在1、2、3 m/s和4m/s等纵向风速下的控制效果进行模拟计算。对比分析不同风速下隧道内火灾烟气的温度、能见度、CO浓度等分布情况。模拟分析表明,在3 m/s的通风速度下火灾烟气流动得到了有效控制。其结果可为狮子洋隧道通风排烟系统设计提供参考。Three criterions of fire smoke flow control were proposed here, including the damage tolerance of human, harmful temperature of lining structure, the breaking temparature of window glass. Taking Shiziyang underwater shield tunnel as the research object, a numerical calculation on fire smoke flow control effects was conducted by using FDS4.0, for the fire hazard of 15MW at train head in tunnel with-3% slope repectively with 1, 2, 3 m/s and 4 m/s longitudinal wind speeds. And then contrast analysis was performed about the fire smoke flow temparature, visibility, CO concentration distribution in the tunnel under different wind speeds. Simulation analysis shows that, the fire smoke flow can be effectively controled on the condition of 3m/s ventilation speed. The results can serve as reference for the design of ventilation and smoke exhaust system in Shiziyang Tunnel.

关 键 词：铁路盾构隧道 火灾烟气控制 数值模拟 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]