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隧道建设(中英文) ›› 2017, Vol. 37 ›› Issue (11): 1409-1416.DOI: 10.3973/j.issn.2096-4498.2017.11.008

• 研究与探索 • 上一篇    下一篇

城市地下道路分(合)流匝道通风阻力特性

袁浩庭1, 陈超1, *, 李琼1, 2, 王陆瑶1, 李亚茹1   

  1. (1. 北京工业大学建筑工程学院, 北京 100124; 2. 华北科技学院建筑工程学院, 北京 101601)
  • 收稿日期:2017-03-01 修回日期:2017-05-04 出版日期:2017-11-20 发布日期:2017-12-09
  • 作者简介:袁浩庭(1990—),男,河北沧州人,北京工业大学暖通专业在读硕士,研究方向为隧道通风。Email: yhtbjut1990@163.com。*通信作者: 陈超, Email: chenchao@bjut.edu.cn。
  • 基金资助:

    国家自然科学基金项目(51378024); 北京市自然科学基金项目(8162006)

Ventilation Resistance Characteristics of Confluence  and Distributary Ramps of Urban Tunnel

YUAN Haoting1, CHEN Chao1, *, LI Qiong1, 2, WANG Luyao1, LI Yaru1   

  1. (1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;  2. Architectural Engineering College, North China Institute of Science and Technology, Beijing 101601, China)
  • Received:2017-03-01 Revised:2017-05-04 Online:2017-11-20 Published:2017-12-09

摘要:

为分析多点进出结构的城市地下道路空气流动特性,以长沙市营盘路湘江隧道为原型,通过现场实测、缩尺模型试验以及CFD软件数值模拟方法,对分(合)匝道通风阻力特性进行了研究,考察了雷诺数、风量比、分岔角度对分(合)流匝道阻力特性的影响规律。研究结果表明: 1)主隧道与匝道风量比、主隧道与匝道夹角是影响分(合)流匝道局部阻力系数的关键因素; 2)城市地下道路分(合)流匝道局部阻力变化特性,不宜简单套用通风管道的三通构件的参数; 3)结合最小二乘法和Matlab软件对计算结果进行多因素回归分析,给出了基于长沙营盘路湘江隧道的分(合)流匝道主隧道和匝道的局部阻力系数关联式。研究结果可为复杂结构城市地下道路通风系统阻力特性分析及通风工程优化设计提供方法参考。

关键词: 多点进出城市地下道路, 分(合)流匝道, 局部阻力系数, 缩尺模型实验, 数值模拟

Abstract:

The ventilation resistance characteristics of confluence and distributary ramps of Xiangjiang Rivercrossing Tunnel on Yingpan Road in Changsha is studied by field monitoring, scale model experiment and software CFD numerical simulation; and then the influences of Reynolds number, air volume ratio and bifurcation angle on resistance characteristic of confluence and distributary ramps of the tunnel are analyzed so as to know the air flowing characteristics of urban underground passageway with bifurcated ramps. The results show that: 1) The air volume ratio and bifurcation angle are the key factors on the local resistance coefficients of confluence and distributary ramps. 2) The parameters of triplet joint component of ventilation pipe cannot be applied to characterize the variation of local resistance of confluence and distributary ramps. 3) The multiplefactor regression analysis of calculation results is carried out by least square method and software Matlab, which provides the expression equation of local resistance coefficient of confluence and distributary ramps of Xiangjiang Rivercrossing Tunnel on Yingpan Road in Changsha. The study results can provide reference for analysis of resistance characteristics of ventilation system and optimization of ventilation engineering design of urban underground passageway with complex structure.

Key words: urban bifurcate tunnel, confluence and distributary ramp, local resistance coefficient, scale model experiment, numerical simulation

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