火灾工况下区间隧道疏散平台的加压送风防烟模式研究
Pressurized air supply and smoke prevention mode for evacuation platform of interval tunnel under fire conditions
摘要：
根据GB 51298—2018《地铁设计防火标准》的要求，当对地下区间进行纵向控烟时，应能控制烟流方向与乘客疏散方向相反，而在面临区间隧道车中火灾这一极致情况时，纵向通风无法有效保证所有乘客疏散时处于洁净区。通过理论分析，结合三维数值模拟，忽略土建因素制约，基于保障区间疏散平台洁净区这一理念，探究了区间隧道防灾气流组织的新模式，并对比了传统模式的防烟效果，给出了应对区间隧道车中火灾的一种新思路。
Abstract：
According to GB 51298-2018 Standard for fire protection design of metro, when longitudinal smoke control is carried out in underground section, the direction of smoke flow should be controlled opposite to the passenger evacuation direction, and when facing the extreme situation of fire in the middle of the train, longitudinal ventilation cannot effectively ensure that all passengers are in a clean zone during evacuation. Through theoretical analysis, combined with the three-dimensional numerical simulation, ignoring the constraints of objective civil construction factors, based on the concept of ensuring the clean zone of the evacuation platform in the interval, presents a new model of air distribution for disaster prevention in the interval tunnel.Compares the smoke prevention effect with the traditional mode, and gives a new idea to deal with the fire in the middle of the train.
Keywords:fire in the middle of the train, evacuation platform, clean zone, smoke prevention, pressurized air supply