Influence of Chimney Effect on Fire Spread in Cable Tunnel

doi:10.3969/j.issn.1674-0696.2023.02.09

Journal of Chongqing Jiaotong University(Natural Science) ›› 2023, Vol. 42 ›› Issue (2): 60-66.DOI: 10.3969/j.issn.1674-0696.2023.02.09

• Transportation Infrastructure Engineering • Previous Articles

Influence of Chimney Effect on Fire Spread in Cable Tunnel

WU Zhi1, ZHANG Wuchao2, WANG Lang1, PENG Jing1, LI Linjie2

(1. Shinan Power Supply Branch of State Grid Chongqing Electric Power Company, Chongqing 401336, China; 2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China)

Received:2021-03-02 Revised:2021-08-19 Published:2023-04-18

烟囱效应对电缆隧道火灾蔓延影响研究

吴执1，张武超2，王琅1，彭璟1，李林杰2

(1. 国家电网重庆市电力公司市南供电分公司，重庆 401336； 2. 重庆交通大学土木工程学院，重庆 400074)

作者简介:吴执(1988—)，男，重庆人，高级工程师，硕士，主要从事电网运维检修方面的工作。E-mail：zhikaixin@126.com 通信作者：李林杰(1986—)，男，重庆人，副教授，博士，主要从事地下建筑火灾方面的研究。E-mail：lilj@cqjtu.edu.cn
基金资助:
重庆市教委科学技术研究资金项目(KJ1705120)

Abstract

Abstract: In order to study the development process and law of cable tunnel fire in mountainous terrain, and provide the basis for the prevention and control of cable tunnel fire and the design of tunnel structure, the three-dimensional fire dynamics simulation software (FDS) was used to simulate the fire in cable tunnels with different slope sections. The laws of smoke spread, flame spread speed and temperature distribution in cable tunnel fire were analyzed. The research results show that the slope sections in cable tunnel would form chimney effect in the fire process, and then affect the development of cable tunnel fire. With the increase of the slope of the cable tunnel slope section, the high temperature area in the tunnel decreases and moves towards the side of the slope section. The slope of the tunnel has a positive correlation with the air inlet velocity at the left end of the tunnel.

Key words: cable tunnel; cable fire; FDS; numerical simulation

摘要： 为了研究电缆隧道火灾在山地地形中的发展过程及规律，为电缆隧道火灾的防治与隧道结构的设计提供基础依据，利用三维火灾动力学模拟软件FDS对含不同坡度段的电缆隧道火灾进行了模拟试验研究，分析了电缆隧道发生火灾时烟气蔓延情况、火焰蔓延速度以及温度分布情况等规律。研究结果表明：电缆隧道内的坡度段在火灾过程中会形成烟囱效应，进而影响电缆隧道火灾的发展；随着电缆隧道坡度段坡度的增加，隧道内的高温区域减小并向着有坡度段的一侧移动；隧道的坡度与隧道左端面的进风速度有正相关的关系。

关键词: 电缆隧道；电缆火灾；FDS；数值模拟

CLC Number:

WU Zhi1, ZHANG Wuchao2, WANG Lang1, PENG Jing1, LI Linjie2. Influence of Chimney Effect on Fire Spread in Cable Tunnel[J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(2): 60-66.

吴执1，张武超2，王琅1，彭璟1，李林杰2. 烟囱效应对电缆隧道火灾蔓延影响研究[J]. 重庆交通大学学报（自然科学版）, 2023, 42(2): 60-66.

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Influence of Chimney Effect on Fire Spread in Cable Tunnel

烟囱效应对电缆隧道火灾蔓延影响研究

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