主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (7): 1009-1012.

• • 上一篇    下一篇

烟囱效应下山岭隧道火风压特性模拟研究

蒋浩锴1，李智胜1，蔡鑫2，张玉春1，孔祥岁3   

  1. 1. 西南交通大学地球科学与环境工程学院，四川成都610031；2. 深圳市交通运输局，广东深圳518040；3. 深圳市交通公用设施建设中心，广东深圳518000
  • 出版日期:2021-07-15 发布日期:2021-07-15
  • 通讯作者: 张玉春(1980-)，男，西南交通大学地球科学与环境工程学院教授，博士生导师。
  • 作者简介:蒋浩锴(1997-)，男，四川遂宁人，西南交通大学地球科学与环境工程学院硕士研究生，主要从事隧道火灾防治的研究，四川省成都市郫都区犀安路999 号，611756。
  • 基金资助:
    国家自然科学基金项目（51578464）

Simulation study on fire pressure characteristics of mountain tunnel under chimney effect

JIANG Hao-kai1，LI Zhi-sheng1，CAI Xin2， ZHANG Yu-chun1，KONG Xiang-sui3   

  1. 1. Faculty of Geosciences and Environmental Engineering，Southwest Jiaotong University，Sichuan Chengdu 610031，China; 2. Shenzhen Municipal Transportation Bureau，Guangdong Shenzhen 518040，China; 3. Shenzhen Transportation Public Facilities Construction Center， Guangdong Shenzhen 518000，China
  • Online:2021-07-15 Published:2021-07-15

摘要： 为探究山岭隧道火灾模式下竖井内火风压的变化特性，采用数值模拟方法，选取火灾发生在竖井附近及远离竖井时的烟气流动特性为研究对象，分析烟气在纵向通风作用下竖井内火风压的变化规律。研究表明：与传统斜坡隧道火灾不同，由于烟气涡流影响，竖井内火风压在纵向通风作用下均呈现非单调的变化趋势，故隧道火风压理论模型不能直接用于竖井内火风压预测；竖井内火风压随纵向风速从0 m/s 增大至3.5 m/s 时呈现逐渐增加趋势，最大差值约为40 Pa；火源靠近竖井时比远离竖井时，竖井内火风压更大，纵向无风时，两者最大差值约为25 Pa。

关键词: 隧道火灾, 竖井, 纵向通风, 火风压

Abstract: In order to explore the variation characteristics of fire pressure in the shaft during mountain tunnel fire，numerical simulation method (FDS) is used to research the flow characteristics of smoke when the fire source is near the shaft or away from the shaft，and analyze fire pressure's variation law in the shaft under longitudinal ventilation. The results showed that，due to the influence of flue gas vortex，the fire pressure in the shaft shows a non-monotonic tendency，which is different from the traditional slope tunnel fire. Thus the theoretical model of tunnel fire pressure can't be used to predict the fire pressure in the shaft directly. With the longitudinal wind speed from 0 m/s to 3.5 m/s，the fire pressure in the shaft increases gradually，and the maximum difference is about 40 Pa. When the fire source is near the shaft，the fire pressure in the shaft is higher than that is away from the shaft. When there is without longitudinal wind，the maximum difference is about 25 Pa.

Key words: tunnel fire, numerical simulation, shaft, longitudinal ventilation, fire pressure