Stability Analysis and Application of Semi-directional T-type Underground Interchange Wind Network

被引：0
|
作者：
Zeng Y.-H. [1 ]
Zhao D.-X. [1 ]
Tao L.-L. [1 ]
Yang G.-C. [1 ]
Liu Z.-H. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Sichuan, Chengdu
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2023年 / 36卷 / 11期
基金：
中国国家自然科学基金;
关键词：
branch classification method; coefficient of stability; tunnel engineering; ventilation system Received 15 Nov. 2022; wind network stability;
D O I：
10.19721/j.cnki.1001-7372.2023.11.017
中图分类号：
学科分类号：
摘要：
To explore the variation law of airflow stability of other branches in the ventilation system when the ventilation power of a branch in the semi-directional T-type underground interchange tunnel changes, and based on the stability characteristics of the ventilation network, the stability of a semi-directional T-type underground interchange ventilation network was analyzed through theoretical derivation and ventilation network calculation. In addition, a method for qualitative analysis of air volume change was proposed. Taking the traffic block in the e3 branch of the underground ventilation network of Jianning West Road as an example, the jet fan opening scheme that meets the requirements of the branch air volume was examined. The results show that when the ventilation power of a branch of the semi-directional T-type underground interchange network changes, the influence on the air volume of other branches conforms to the stability change law of the simple diagonal network. When the natural wind pressure is constant,the influence of the change of the virtual edge air volume on the stability of the wind network can be ignored. When the ventilation power of multiple branches in the ventilation network changes simultaneously, the influence on the air volume of a branch can be calculated via simple mathematical superposition. The stability of the semi-directional T-typc underground ventilation network can be simplified into the stability problem between multiple simple corner ventilation networks in the form of a tree. The sensitivity coefficient of the e5 branch of the ramp in the semi-directional T-type underground interchange of Jianning West Road is the largest, of 3. 33, and is mostly affected by the change in the ventilation power of the wind network. The dominant coefficient of the main tunnel e3 branch is 1. 91, and the change in ventilation power has the greatest influence on other branches. Moreover, ei, e2, e3, and e5 open 6, 4, 9, and 2 jet fans, respectively, for optimal ventilation when a traffic block occurs in the main tunnel e3 branch. © 2023 Xi'an Highway University. All rights reserved.
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页码：367 / 374
页数：7
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