圆形盾构结构过江隧道火灾烟气运动模拟分析  

Simulation Analysis of Fire Smoke Movement in a Circular Shield Structure River-crossing Tunnel

作　　者：张建一 李建军 李沙 金诗奇 ZHANG Jianyi;LI Jianjun;LI Sha;JIN Shiqi(Hangzhou Qianjiang New Town Construction and Development Co.,Ltd.,Hangzhou 310000,Zhejiang,China;Hangzhou Qiantang District Transportation Development Center,Hangzhou 310000,Zhejiang,China;Hangzhou Qiantang New Area Construction Investment Group Co.,Ltd.,Hangzhou 310000,Zhejiang,China;The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310000,Zhejiang,China)

机构地区：[1]杭州市钱江新城建设开发有限公司,浙江杭州310000 [2]杭州市钱塘区交通运输发展中心,浙江杭州310000 [3]杭州钱塘新区建设投资集团有限公司,浙江杭州310000 [4]浙江大学建筑设计研究院有限公司,浙江杭州310000

出　　处：《工程技术研究》2023年第12期40-42,共3页Engineering and Technological Research

摘　　要：我国公路隧道的建设正处于快速发展的阶段,隧道排烟系统设计以及火灾时的烟气运动情况对于隧道安全至关重要。过江隧道普遍采用盾构法及重点排烟的方式,当前对于此排烟方式的研究仍较少。文章针对杭州某过江隧道中实际采用的圆形盾构结构建立了三维模型,采用火灾动态模拟器FDS软件进行了火灾模拟,分析了火灾时隧道内烟层厚度、温度、能见度等烟气运动参数的变化情况。模拟结果表明:火灾发生后排烟系统可以将高温烟气有效控制在火源位置前后250 m的范围,验证了排烟系统的有效性,并为隧道人员疏散设计以及火灾应急响应预案提供了参考。The construction of highway tunnels in China is in a rapidly developing stage.The design of tunnel smoke exhaust system and the smoke movement during fire are very important for tunnel safety.Shield method and key smoke exhaust method are widely used in river-crossing tunnels,and there are still few studies on this smoke exhaust method at present.A three-dimensional model was established for the circular shield structure actually used in a rivercrossing tunnel in Hangzhou.The fire dynamic simulator FDS software was used to simulate the fire,and the changes of smoke movement parameters such as smoke layer thickness,temperature and visibility in the tunnel during fire were analyzed.The simulation results show that the smoke exhaust system can effectively control the high temperature smoke in the range of 250 m in front of and behind the fire source location after a fire occurs,which verifies the effectiveness of the smoke exhaust system and provides a reference for the tunnel people evacuation design and fire emergency response plan.

关 键 词：隧道火灾 烟气运动 数值模拟 排烟道 

分 类 号：U231.96[交通运输工程—道路与铁道工程]