城际铁路隧道携火列车进地下站烟流控制技术研究

发布时间：2018-03-04 03:03

本文选题：城际铁路隧道　切入点：地下车站　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,我国城际铁路发展迅猛,由于线路标准、土地资源紧张等因素,不可避免将会遇到大量的隧道及隧道群,鉴于火灾可能造成的灾难性后果,开展城际铁路隧道相关的防灾疏散救援技术研究显得尤为紧迫和重要。城际铁路隧道的特点介于山岭铁路隧道和地铁之间,其站间距为5～20km,列车在隧道内发生火灾后若不能驶出洞外,地下车站成为了最佳的紧急疏散点,因此,本文采用理论分析、现场调研、数值计算相结合的方法对城际铁路携火列车进地下站的烟流控制技术进行了研究,主要成果体现在以下几个方面:1.采用理论分析和现场调研的方法,对城际铁路地下站防排烟系统及携火列车进站模拟技术进行了研究,探明了城际铁路地下站的防排烟模式,确定了城际列车的火灾规模及烟气生成率,提出了携火列车进地下站的模拟技术。2.基于动网格技术和三维不可压缩Navier-Stokes方程,采用湍流模型、辐射模型及组分运输模型建立了携火列车进地下站的数值模型,分析了有无屏蔽门情况下的烟气扩散规律及影响范围,并对火灾情况下屏蔽门玻璃破裂行为进行了研究,得到了有屏蔽门情况下的温度场分布规律。3.采用非恒定流活塞风计算理论,推导了活塞风速的解析解,得到了列车制动车速与活塞风速的关系,通过数值模拟的方法分析了活塞风的衰减过程及携火列车进地下站排烟阀的风速、压力、温度变化规律,确定了活塞风对排烟阀排烟效率、排热效率的影响规律。4.考虑火灾模式下人员的心理、生理、组成、速度等行为特征对疏散时间的影响,提出了基于人员行为特征的疏散时间修正系数,建立了城际铁路地下站人员疏散时间的计算方法。
[Abstract]:In recent years, the inter-city railway in China has developed rapidly. Due to such factors as line standard and land resource shortage, there will inevitably be a large number of tunnels and tunnel groups. In view of the disastrous consequences of the fire, It is particularly urgent and important to study the disaster prevention, evacuation and rescue technology related to inter-city railway tunnel. The characteristics of inter-city railway tunnel are between mountain railway tunnel and subway. If the train can not leave the tunnel after fire, the underground station has become the best emergency evacuation point. Therefore, the theoretical analysis and field investigation are adopted in this paper. The control technology of smoke flow in underground station of intercity railway fire carrying train is studied by the method of numerical calculation. The main results are as follows: 1. The method of theoretical analysis and field investigation is adopted. The smoke prevention and exhaust system of intercity railway underground station and the simulation technology of fire carrying train entry station are studied, the smoke prevention and exhaust mode of intercity railway underground station is proved, and the fire scale and smoke generation rate of intercity train are determined. Based on the dynamic grid technique and three-dimensional incompressible Navier-Stokes equation, the numerical model of fire carrying train entry underground station is established by using turbulence model, radiation model and component transport model. In this paper, the law of smoke diffusion and its influence range are analyzed, and the rupture behavior of glass in the case of fire is studied. The distribution law of temperature field in the case of shielded door is obtained. 3. The analytical solution of piston wind speed is derived by using the calculation theory of unsteady flow piston wind, and the relationship between train braking speed and piston wind speed is obtained. By means of numerical simulation, the attenuation process of piston air and the variation law of wind speed, pressure and temperature of exhaust valve in underground station of carrying fire train are analyzed, and the efficiency of exhaust gas from piston wind to exhaust valve is determined. Considering the influence of psychological, physiological, composition, speed and other behavior characteristics on evacuation time in fire mode, a correction coefficient of evacuation time based on human behavior characteristics is proposed. The method of calculating evacuation time of intercity railway underground station is established.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U458;U298.4

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