| 公路隧道巷道式施工通风瓦斯分布研究 |
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| 引用本文： | 曾昌,姚志刚,范建国,方勇. 公路隧道巷道式施工通风瓦斯分布研究[J]. 隧道建设, 2016, 36(7): 837-843. DOI: 10.3973/j.issn.1672-741X.2016.07.011 |
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| 作者姓名： | 曾昌 姚志刚 范建国 方勇 |
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| 作者单位： | （1. 西南交通大学土木工程学院， 四川 成都 610031； 2. 西南交通大学交通隧道工程教育部重点实验室， 四川 成都 610031） |
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| 基金项目： | 国家自然科学基金资助项目(51278422)； 四川省青年科技基金项目(2012JQ0021) |
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| 摘 要： | 为探究瓦斯公路隧道巷道式施工通风中瓦斯的体积分数分布规律，利用流体力学研究软件FLUENT建立三维隧道模型并进行了数值仿真计算，通过对隧道内部整体、掌子面附近和主洞与横通道连接处瓦斯体积分数分布的研究，分析了隧道内部瓦斯分布的具体特点并深入探讨了内部回流区、涡流区和瓦斯容易聚集的位置。模拟结果表明： 瓦斯从一侧主洞涌出后，不会对另一侧造成污染； 涡流区瓦斯体积分数明显大于周围区域； 风管所在一侧截面上瓦斯体积分数分布明显低于异侧。
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| 关 键 词： | 公路隧道 巷道式通风 数值模拟 瓦斯分布 |
| 收稿时间： | 2015-06-02 |
| 修稿时间： | 2016-04-21 |
Study of Gas Distribution of Highway Tunnel Using Gallery Ventilation |
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| ZENG Chang,YAO Zhigang,FAN Jianguo,FANG Yong. Study of Gas Distribution of Highway Tunnel Using Gallery Ventilation[J]. Tunnel Construction, 2016, 36(7): 837-843. DOI: 10.3973/j.issn.1672-741X.2016.07.011 |
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| Authors: | ZENG Chang YAO Zhigang FAN Jianguo FANG Yong |
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| Affiliation: | (1. School of Civil Engineering， Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China) |
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| Abstract: | A three dimentional model of highway tunnel is established and numerically simulated by means of hydrodynamics software Fluent. The gas distribution in main tunnel and connection gallery and at working face are studied; and the gas distribution characteristics in tunnel, especially in recirculating zone, eddy zone and gas concentration zone, are analyzed. The simulation results show that: 1) The gas gushes from a main tunnel has no harm to another main tunnel. 2) The gas concentration in eddy zone is larger than that in surrounding zones. 3) The gas concentration at the side with ventilation pipe is smaller than that at the side without ventilation pipe. |
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| Keywords: | highway tunnel gallery ventilation numerical simulation gas distribution |
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