公路隧道集中排烟系统非火灾时风压分布现场测试研究  

Field Test and Research on Wind Pressure Distribution of Centralized Smoke Exhaust Systems in Highway Tunnels in Absence of Fire

作　　者：王少锋 刘邱林 徐志胜[2] 陈玉远[1] 胡丙伟 王悦琳 甄雅星 WANG Shaofeng;LIU Qiulin;XU Zhisheng;CHEN Yuyuan;HU Bingwei;WANG Yuelin;ZHEN Yaxing(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China;Disaster Prevention Science and Safety Technology Institution,Central South University,Changsha 410075,Hunan,China;Yuzhou Coal Industry Administration Bureau,Yuzhou 461670,Henan,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]中南大学防灾科学与安全技术研究所,湖南长沙410075 [3]禹州市煤炭工业管理局,河南禹州461670

出　　处：《隧道建设（中英文）》2023年第5期797-803,共7页Tunnel Construction

基　　金：中南大学中央高校基本科研经费(2021zzts235)。

摘　　要：为得到集中排烟模式下排烟道内压力分布与沿程阻力,以梅子洲长江隧道为研究对象,对排烟道内风速与静压进行现场测试,分析排烟道内的沿程阻力。结果显示:1)风流进入排烟道后形成负压,其大小逐渐下降,并在排烟道末端达到绝对值最大;2)两端风机匹配的风压、风量与两端排烟道管线长度有关,当开启的排烟阀靠近风机时,风机匹配到的风压较小;3)不同排烟阀开启方式下排烟道内沿程阻力系数为0.01~0.03,平均值为0.018。研究结果表明,在工程中选取风机时要综合考虑管线长度,管线长度的最不利工况为开启的排烟阀位于某一端工作井时,最不利管线长度为两端工作井之间的距离。在施工时提高排烟道两端的排烟阀质量,改善排烟阀漏风情况,可有效降低排烟道两端的沿程阻力。To investigate the pressure distribution laws and along-range resistance in the exhaust flue under the centralized smoke exhaust mode,the wind speed and static pressure in the exhaust flue of the Meizizhou Yangtze river tunnel are experimentally tested in the field and the along-range resistance in the exhaust flue is analyzed.The results reveal the following.(1)The negative pressure formed after the wind flow enters the exhaust flue gradually decreases and reaches the maximum absolute value at the end of the exhaust flue.(2)The wind pressure and air volume matched by fans at both ends are related to the length of the exhaust flue pipeline at both ends,and the wind pressure matched by the fans is lower when the exhaust valve is opened near the fans.(3)The along-range resistance coefficient in the exhaust flue under the various modes of exhaust valve opening ranges from 0.01 to 0.03 with an average value of 0.018.The results reveal that the length of the pipeline should be comprehensively considered when selecting a fan,and the most unfavorable pipeline length is the distance between the two ends of the work shaft when the open smoke exhaust valve is located at one end of the work shaft.Furthermore,improving the quality of smoke exhaust valves at both ends of the flue during construction to reduce wind leakage effectively lowers the resistance along both ends of the flue.

关 键 词：公路隧道 集中排烟 排烟道风压 沿程阻力系数 现场测试 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]