超长地铁区间隧道高压细水雾试验与应用研究  

Study on Tests and Application of High Pressure Water Mist in Long Metro Tunnel

作　　者：丛北华[1] 韩新[1] 干思诗 孙少华 Cong Beihua;Han Xin;Gan Sishi;SunShaohua(Shanghai Institute of Disaster Prevention and Relief,Tongji University,Shanghai 200023,P.R.China)

机构地区：[1]同济大学上海防灾救灾研究所,上海200092

出　　处：《地下空间与工程学报》2021年第3期706-711,共6页Chinese Journal of Underground Space and Engineering

基　　金：上海市2018年度“科技创新行动计划”社会发展领域项目(18DZ1201500)。

摘　　要：地铁作为人员高度密集的地下公共场所,一旦发生火灾事故,人员易受到火灾高温烟气的不利影响导致中毒进而发生伤亡。本文针对地铁超长区间隧道人员安全疏散的难题,开展了高压细水雾在地铁区间隧道火灾下分隔有毒烟雾以保障人员安全逃生的研究。通过建立1∶2.5的缩尺度区间隧道火灾试验模型,设置多种着火工况,比较高压细水雾系统在不同风速、不同喷雾强度、不同喷头工作压力下的隔烟、消烟效果,并以烟气蔓延情况和有毒气体(CO)浓度作为主要标准进行评判。结果表明,环状设置的高压细水雾形成雾幕有效隔离和消减区间隧道火灾有毒烟气,在区间隧道人员逃生路径上形成“准安全区”,为人员疏散创造有利的安全环境。As a highly crowded underground public place,once the fire accident brekes out,casualties may occur when the people are exposed to the toxicity and high temperature.In this paper,the separating toxic smoke from the fire in long metro tunnel by using high pressure water mist curtain was carried out to ensure the safety of people's evacuation.By establishing a 1:2.5 scale tunnel model to simulate the subway tunnel fire,the smoke isolation and elimination effects of the high pressure water mist system under different wind speeds,spray intensities and nozzle working pressures were compared.The smoke spreading state and the concentration of toxic gas(CO)were used as test criteria.Results shows that the high pressure fine water mist nozzles setting as rings could effectively isolate and reduce the toxic smoke of the fire in tunnel,which forms a“quasi-safety zone”on the escape path to protect people evacuating more safely.

关 键 词：超长区间隧道 高压细水雾 烟气分隔 安全疏散 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]