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 (1): 42-46.

• • 上一篇    下一篇

综合管廊坡度对燃气泄漏扩散影响研究

李惊涛1,2,3，戚承志1,2,3，陈昊祥1,2,3，王皓楠1,2,3，靳天伟1,2,3   

  1. 1. 北京未来城市设计高精尖创新中心，北京100044；2. 北京城市交通基础设施建设国际合作基地，北京100044；3. 北京建筑大学土木与交通工程学院，北京100044

  • 出版日期:2021-01-15 发布日期:2021-01-15
  • 作者简介:李惊涛（1996-），男，湖北十堰人，北京建筑大学土木与交通工程学院硕士研究生，主要从事地下结构防灾减灾工程研究，北京市西城区展览馆路1 号，10004
  • 基金资助:
    国家自然科学基金项目（51774018）；长江学者和创新团队发展计划（IRT_17R06）

Study on the influence of the gradient of utility tunnel on the gas leakage and diffusio

LI Jing-tao1,2,3，QI Cheng-zhi1,2,3， CHEN Hao-xiang1,2,3，WANG Hao-nan1,2,3， JIN Tian-wei1,2,3   

  1. 1. School of Civil and Transportation Engineering, Beijing 100044, China; 2. Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044, China; 3. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
  • Online:2021-01-15 Published:2021-01-15

摘要： 利用Fluent 软件研究纵向坡度为0̊ 、5̊ 、10̊ 、15̊ 和不同通风方向情况下，燃气舱内发生小孔泄漏从正常通风到报警器响应切换事故通风的过程。结果表明：燃气泄漏扩散方向与坡度和通风方向有关，事故通风后扩散方向与通风方向相同，距离泄漏口30 m 以上扩散速度与坡度呈正相关。通风方向相同，坡度越大报警器响应时间越短。各坡度下根据首先响应两个报警器的响应时间均可初步判断泄漏源位置。对于甲烷报警器的布置，建议坡度增大时可以适当降低该侧壁报警器的布置高度。

关键词: 综合管廊, 泄漏扩散, 纵向坡度, 报警时间, 数值模拟

Abstract: Fluent software was used to study the process of small hole leakage in gas tank from normal ventilation to alarm response switching emergency ventilation under the conditions of longitudinal slope of 0̊, 5̊, 10̊ and 15̊ and different ventilation directions. The results show that: the diffusion direction of gas leakage is related to the slope and ventilation direction. After the accident ventilation, the diffusion direction is the same as the ventilation direction, and the diffusion speed is positively correlated with the gradient when the distance is more than 30 m from the leakage port. With the same ventilation direction, the greater the slope is, the shorter the alarm response time will be. According to the response time of the first two alarms, the location of the leakage source can be preliminarily determined under each slope. Therefore, for methane alarm arrangement, it is suggested that the layout height on the side wall can be appropriately reduced with greater slope.

Key words: utility tunnel, leakage diffusion, gradient, alarm time, numerical simulatio