城市轨道交通工程在联络通道不设置防火门的情况下，隧道火灾通风控烟模式研究缺少全尺寸试验验证， 针对该问题，选择郑州地铁的典型区间隧道开展列车在隧道中不同位置发生火灾的多工况通风控烟试验。通过测 试不同工况下的火灾隧道及联络通道处的控烟风速，验证不设置联络通道防火门对隧道火灾通风控烟的影响以及 不同通风控烟模式的实际效果。研究结果表明：对于车站采用全封闭站台门、区间设有1 条联络通道的试验区间 隧道，在不设置防火门条件下(即开启防火门)，试验采用的各种通风控烟模式在门洞处均可获得吹向着火侧隧道 且大于2 m/s 的风速，同时火灾隧道内的排烟风速也大于2 m/s，可满足相关规范的控烟要求，在类似工程中取消 防火门具有可行性；不同通风控烟模式在门洞处获得的风速有所不同，采用送风车站的2 台隧道风机向火灾隧道 送风、2 台隧道风机向非火灾隧道加压送风，排烟车站的4 台隧道风机均用于火灾隧道排烟的控烟模式，可以在 联络通道门处获得较大的风速。

In response to the absence of experimental verification of smoke control and ventilation models for tunnel fires without fire doors in cross-passageways of urban rail transit projects, this study conducted a comprehensive ventilation and smoke control experiment in a typical tunnel of the Zhengzhou Metro. The experiment focused on varying locations of train fires within the tunnel. By assessing smoke control wind speeds in both the fire tunnel and cross-passageway under different conditions, our objective was to validate the impact of not installing fire doors in cross-passageways on tunnel fire ventilation and smoke control, and to evaluate the effectiveness of different ventilation and smoke control models. The results indicated that in tunnels with fully enclosed platform doors and one cross-passageway in the test sections, the absence of fire doors (i.e., with open fire doors) resulted in all tested ventilation and smoke control models achieving wind speeds exceeding 2 m/s blowing towards the side where the fire occurred at the door openings. Simultaneously, exhaust wind speeds inside the fire tunnels exceeded 2 m/s, meeting the regulatory requirements for smoke control. These findings suggest the feasibility of omitting fire doors in similar projects. Different ventilation and smoke control models demonstrated varying wind speeds at door openings. Models utilizing two tunnel fans to supply air to the fire tunnel and pressurize non-fire tunnels, coupled with four exhaust fans to extract smoke from the fire tunnel, achieved higher wind speeds at cross-passageway entrances.

U231

北京市自然科学基金资助项目(8172006)